g 1.90 kg textbook rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.150 m, to a hanging book with mass 3.10 kg. The system is released from rest, and the books are observed to move 1.20 m in 0.900 s . Part A What is the tension in the part of the cord attached to the textbook? Express your answer with the appropriate units. T1 = nothing nothing Request Answer Part B What is the tension in the part of the cord attached to the hanging book? Express your answer with the appropriate units. T2 = nothing nothing Request Answer Part C What is the moment of inertia of the pulley about its rotation axis? Express your answer with the appropriate units. I = nothing nothing Request Answer Provide Feedback
Answers
Answer:
Explanation:
First of all we shall calculate the acceleration of the system . Let it be a .
s = ut + 1/2 a t²
1.2 = 1/2 x a x .9²
a = 2.963
A ) Applying 2nd law of motion on textbook
T₁ = ma , m is mass of the textbook a is its acceleration
T₁ = 1.9 x 2.963
= 5.63 N .
B ) Applying 2nd law of motion on hanging book
mg - T₂ = ma , m is mass of hanging book , a is its acceleration
T₂ = mg - ma
= m ( g - a )
= 3.1 x ( 9.8 - 2.963 )
= 21.2 N
C )
Torque on the pulley
= ( T₂ - T₁ ) x R
R is radius of the pulley
= (21.2 - 5.63 ) x .075
= 1.16775 Nm
angular acceleration of pulley
α = linear acceleration / radius
= 2.963 / .075
= 39.5 rad / s²
torque on pulley = moment of inertia x angular acceleration
1.16775 = moment of inertia x 39.5
moment of inertia = 29.56 x 10⁻³ kg m² .
(a) The tension of the chord attached to the textbook is 5.624 N.
(b) The tension of the chord attached to the hanging book is 21.2 N.
(c) The moment of inertia of the pulley about its rotation axis is 0.0296 kgm².
The given parameters:
Mass of the text book, m = 1.90 kgDiameter of the pulley, d = 0.15 mMass of hanging book = 3.10 kgdistance traveled by the book, s = 1.2 mtime of motion of the book, t = 0.9 sThe acceleration of the book at the given displacement and time is calculated as;
\(s = ut \ + \ \frac{1}{2} at^2\\\\s = 0 + \frac{1}{2} at^2\\\\s = \frac{1}{2} at^2\\\\a = \frac{2s}{t^2} \\\\a = \frac{2 \times 1.2 }{0.9^2} \\\\a = 2.96 \ m/s^2\)
The tension of the chord attached to the textbook is calculated as follows;
T = ma
T = 1.9 x 2.96
T = 5.624 N
The tension of the chord attached to the hanging book is calculated as follows;
T = mg - ma
T = m(g - a)
T = 3.1(9.8 - 2.96)
T = 21.2 N
The torque on the pulley is calculated as;
\(\tau = \Delta T R\\\\ \tau = (T_2-T_1)R\\\\ \tau = (21.2 - 5.624) \times 0.075\\\\ \tau = 1.168 \ Nm\)
The angular acceleration of the books is calculated as;
\(\alpha = \frac{a}{R} \\\\\alpha = \frac{2.964}{0.075}\\\\\alpha =39.52 \ rad/s^2\)
The moment of inertia of the pulley about its rotation axis is calculated as follows;
\(\tau = I \alpha\\\\I = \frac{\tau }{\alpha} \\\\I = \frac{1.168}{39.52} \\\\I = 0.0296 \ kg m^2\)
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Related Questions
If a 3.5 kg object is accelerating at 0.80 /s^2, the net force F causing this motion is ____ N.
A) 2.2
B)2.8
C)3.4
D)4.0
Answers
Answer:
The answer is option BExplanation:
To find the force acting on an object we use the formula
force = mass × accelerationFrom the question
mass = 3.5 kg
acceleration = 0.80 m/s²
We have
Force = 3.5 × 0.8
We have the final answer as
2.8 NHope this helps you
Which statement is true about the theory of plate tectonics and the theory of continental drift?
A) The theory of plate tectonics proves the theory of continental drift completely wrong.
B) The theory of plate tectonics tells exactly where the continents were before Pangaea divided.
C) The theory of plate tectonics gives the method by which continents can move as part of plates.
D) The theory of plate tectonics does not explain how continental movements could occur.
Answers
The statement that is true about the theory of plate tectonics and the theory of continental drift C. The theory of plate tectonics gives the method by which continents can move as part of plates .
What is theory of plate tectonics and the theory of continental drift ?According to the scientific hypothesis of plate tectonics, the underground movements of the Earth create the primary landforms. By explaining a wide range of phenomena, including as mountain-building events, volcanoes, and earthquakes, the theory, which became firmly established in the 1960s, revolutionized the earth sciences.
The scientist Alfred Wegener is most closely connected with the concept of continental drift. Wegener wrote a paper outlining his notion that the continents were "drifting" across the Earth, occasionally crashing through oceans and into one another, in the early 20th century.
According to tectonic theory, the Earth's surface is dynamic and can move up to 1-2 inches every year. The numerous tectonic plates constantly move and interact. The outer layer of the Earth is altered by this motion. The result is earthquakes, volcanoes, and mountains.
Therefore, option C is correct.
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Two friends stand at the top of the White Cliffs of Dover in England. One throws a
stone with a velocity of 11 m/s at an angle of 30° above the horizontal off the cliff
and into the water below. The second drops the stone from rest. Both release the
stones at exactly the same time from a height of 110 m above the water. Assuming
no air resistance, how long after the first splash is the second splash?
F
0.60 s
G
1.1 s
H
3.6 s
J
4.7 s
Answers
The second splash is 1.1 s after the first splash.
What is velocity?The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction is displacement.
Given parameters:
Initial velocity of the First stone; u₁ = 11 m/s.
Initial velocity of the Second stone; u₂= 0 m/s.
Height of both cases; h = 110 m.
Acceleration due to gravity; g = 9.8 m/s².
So, If time taken by the first stone is t₁; then
h = u₁t₁ + 1/2 * gt₁²
⇒ 110 = 11 t₁ + 1/2*9.8 t₁²
⇒ 4.9 t₁² + 11 t₁ -110 = 0
So, by solving this quadratic equation we get: t₁ =3.73s.
And if time taken by the second stone is t₂; then
h = 1/2*g t₂²
⇒ t₂ = √(2h/g) = √(2×110/9.8) = 4.74 s.
Hence, the second splash happens after first splash by a time = (4.74 - 3.73) s = 1.01 s = 1.1 second ( approx.).
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Choose True or False. If False, choose the statement that makes it True.
James Clerk Maxwell laid the foundation for the discovery of electromagnetism.
Answers
A parallel-plate capacitor is constructed of two disks spaced 2.00 mm apart. It is charged to a potential difference of 500. V. A proton is shot through a small hole in the negative plate with a speed of 2.0 × 105 m/s. What is the farthest distance from the negative plate that the proton reaches?
Answers
Answer:
\(0.000835\ \text{m}\)
Explanation:
d = Distance between plates = 2 mm
V = Potential difference = 500 V
v = Velocity of proton = \(2\times 10^5\ \text{m/s}\)
a = Acceleration
m = Mass of proton = \(1.67\times 10^{-27}\ \text{kg}\)
Electric field is given by
\(E=\dfrac{V}{d}\\\Rightarrow E=\dfrac{500}{2\times 10^{-3}}\\\Rightarrow E=250000\ \text{V/m}\)
Force balance is given by
\(ma=qE\\\Rightarrow a=\dfrac{qE}{m}\\\Rightarrow a=\dfrac{1.6\times 10^{-19}\times 250000}{1.67\times 10^{-27}}\\\Rightarrow a=2.395\times 10^{13}\ \text{m/s}^2\)
We have the relation
\(v^2=u^2+2as\\\Rightarrow s=\dfrac{v^2-u^2}{2a}\\\Rightarrow s=\dfrac{(2\times 10^5)^2-0}{2\times 2.395\times 10^{13}}\\\Rightarrow s=0.000835\ \text{m}\)
The farthest distance from the negative plate that the proton reaches is \(0.000835\ \text{m}\).
The farthest distance from the negative plate that the proton reaches will be s=0.000835 m
What is electric field?The electric field is defined as the force across the charged particles which attract or repel the other charged particles.
Now it is given in the question that
d = Distance between plates = 2 mm
V = Potential difference = 500 V
v = Velocity of proton = \(2\times 10^5\ \dfrac{m}{s}\)
a = Acceleration
m = Mass of proton = \(1.67\times10^{-27} kg\)
The Electric field will be calculated as
\(E=\dfrac{V}{d}\)
\(E=\dfrac{500}{2\times10^{-3}} =250000\ \frac{V}{m}\)
Force balance is given by
\(ma=qe\)
\(a=\dfrac{qE}{m}\)
\(a=\dfrac{1.6\times10^{-19}\times250000}{1.67\times10^{-27}}\)
\(a=2.395\times 10^{13}\frac{m}{s^2}\)
Now from equation of motion
\(v^2=u^2+2as\)
\(s=\dfrac{v^2-u^2}{2a}\)
\(s=\dfrac{(2\times10^5)^2-0}{2\times 2.395\times 10^{13}}\)
\(s=0.000875 m\)
Thus the farthest distance from the negative plate that the proton reaches will be s=0.000835 m
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Laasya is lifting a table and moving it to another room to expand the space in her room. What mode of
strength-training
is Laasya performing?
Answers
Laasya is performing resistance training by lifting a table and moving it to another room to expand the space in her room. The correct option to this question is D.
Strength training By putting your muscles up against resistance, resistance training builds muscle strength. Free weights, weight machines, resistance bands, and your own body weight are all used in various types of resistance training. To get the most out of their training, beginners should go two or three times per week.Resistance training is founded on the idea that, when called upon, the body's muscles will struggle to overcome a resisting force. Resistance exercise has both advantages and disadvantages.Resistance exercises include planks, sit-ups, squats, push-ups, leg raises, and leg extensions. You and a small amount of room are all that are needed for these strength training exercises.For more information on resistance training kindly visit to
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Complete question : Laasya is lifting a table and moving it to another room to expand the space in her room. What mode of strength-training is Laasya performing?
a. Endurance
b. Isometric
c. Isotonic
d. Resistance
define the principal focus of a concave mirror
Answers
The principal focus of a concave mirror is a point on the axis of the mirror at which parallel rays of light are brought to focus after being reflected by the mirror. A concave mirror is a mirror with a curved surface that is shaped like the inside of a bowl, with the center of the curve facing outward. When light rays are reflected by a concave mirror, they are brought to a focus at the principal focus of the mirror. The distance from the center of the mirror to the principal focus is known as the focal length of the mirror. The principal focus of a concave mirror is an important concept in optics and is used in the design and operation of various optical instruments, such as telescopes and cameras.
You are working in the finance department of Innotech Ltd (INT). The Company has spent $5 million
in research and development over the past 12 months developing cutting-edge battery technology
which will be incorporated into the electric vehicle market. INT now need to choose between the
following three options for bringing the product to market. These options are:
Option 1: Manufacturing the product “in-house” and selling directly to the market
Option 2: Licensing another company to manufacture and sell the product in return for a royalty
Option 3: Sell the patent rights outright to the company mentioned in option 2
Your task
Your manager, INT’s CFO, Mr Barry Smith, has asked you to evaluate the three different options and
draft a memo to the Board of Directors providing recommendations on the alternatives, along with
supporting analyses.
Mr Smith has outlined the following three (3) areas you need to cover in your memo:
a) Analyse base case figures for the three options and using NPV as the investment decision
rule;
b) Provide recommendations based on the base-case analyses;
c) Provide recommendations on further analyses and discuss factors that should be considered
prior to making a final decision on the three options (Note. You do NOT have to undertake
any further financial analyses).
Further details for the various options are as follows:
Option 1: Manufacturing the product “in-house” and selling directly to the market
Three months ago, INT paid an external consultant $1.5 million for a production plan and demand
analysis. The consultant recommended producing and selling the product for five years only as
technological innovation will likely render the market too competitive to be profitable enough after
that time. Sales of the product are estimated as follows:
In the first year, it is estimated that the product will be sold for $45,000 per unit. However, the price
will drop in the following three years to $40,000 per unit and fall again to $36,000 per unit in the
final year of the project, reflecting the effects of anticipated competition and improving technology
Year Estimated sales volume
(units)
1 5,200
2 4,600
3 4,200
4 3,800
5 3,600
In the first year, it is estimated that the product will be sold for $45,000 per unit. However, the price
will drop in the following three years to $40,000 per unit and fall again to $36,000 per unit in the
final year of the project, reflecting the effects of anticipated competition and improving technology
in the market. Variable production costs are estimated to be $29,000 per unit for the entire life of the
project.
Fixed production costs (excluding depreciation) are predicted to be $3 million per year and marketing
costs will be $1.6 million per year.
Production will take place in factory space the company owns and currently rents to another business for $2.5 million per year. Equipment costing $87 million will have to be purchased. This
equipment will be depreciated for tax purposes using the prime cost method at a rate of 10% per
annum. At the end of the project, the company expects to be able to sell the equipment for $37
million.
Investment in net working capital will also be required. It is estimated that accounts receivable will
be 30% of sales, while inventory and accounts payable will each be 25% of variable and fixed
production costs (excluding depreciation). This investment is required from the beginning of the
project because credit sales, inventory stocks and purchases on trade credit will begin building up
immediately. All accounts receivable will be collected, suppliers paid and inventories sold by the end
of the project, thus the investment in net working capital will be returned at that point. (Refer to
spreadsheet example provided in Assessment Details).
Option 2: Licensing another company to manufacture and sell the product in return for a royalty
Lion Batteries Ltd (LIB), a multinational corporation, has expressed an interest in manufacturing and
marketing the pro
Answers
Answer: The Company has spent $5 million in research and development over the past 12 months developing cutting-edge battery technology which will be incorporated ...
Explanation: uhmmmmmm i dont know this one but it is pretty ez
What is sound waves
Answers
Sound waves are a type of mechanical wave that propagate through a medium, typically air but also other materials such as water or solids.
Characteristics of sound wavesFrequency: the frequency of a sound wave refers to the number of cycles or vibrations it completes per second and is measured in Hertz (Hz).
Amplitude: the amplitude of a sound wave refers to the maximum displacement or intensity of the wave from its equilibrium position. It represents the loudness or volume of the sound, with larger amplitudes corresponding to louder sounds and smaller amplitudes corresponding to softer sounds.
Wavelength: the wavelength of a sound wave is the distance between two consecutive points in the wave that are in phase, such as from one peak to the next or one trough to the next. It is inversely related to the frequency of the wave.
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Pls help I will mark
BRAINLIEST
Which state of category of elements has the greatest number of elements? Least?
Answers
The metal category of elements has the greatest number of elements while the metalloids category of elements is the least in the periodic table.
What are metalloids?The elements of the periodic tables that behave as metal, as well as the nonmetal in some chemical or physical aspects, are known as metalloids. Some examples of metalloids are Boron, silicon, germanium, arsenic, antimony, tellurium, etc.
The nonmetals are to the right of the line, the metalloids are exactly next to it, and the metals are to the left of the line (except for hydrogen, which is a nonmetal).
Thus, In the periodic table, the category of metals has the most elements, whereas the category of metalloids has the fewest.
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ANSWER QUICKLY PLEASE <3
Ampère placed two 1.50-m wires parallel to each other so that they were 4.80 cm apart.
He delivered a current of 6.50 A to the wires. Both wires experienced an external
magnetic field of 2.71 X 10^−5 T. Determine the force on one of the wires.
Answers
The forces on one of the wires will be 0.000264 N.It is the field sensed around a moving electric charge that gives rise to the magnetic force.
What is a magnetic field?It is the type of field where the magnetic force is obtained. With the help of a magnetic field. The magnetic force is obtained it is the field felt around a moving electric charge.
The given data in the problem is;
I is the current = 6.50 A
B is the magnetic field=f 2.71 X 10⁻⁵ T
The force on the wire is;
\(\rm F= BIL \\\\\ F=2.71 \times 10^{-5} \ T \times 6.50 \ A \times 1.50 \ m \\\\\ F=0.000264225 \ N\)
Hence, the force on one of the wires will be 0.000264 N.
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In the diagram, q1, q2, and q3 are in a striaght line. each of these particles has a charge of -2.35 x 10^-6 C. Particles q1 and q2 are separated by 0.100 m and particles q2 and q3 are separated by 0.100 m. What is the net force on particle q1?
PLEASE ANSWER IVE BEEN STUCK ON THIS SECTION FOR A WEEK
Answers
The net force on q1 is 9.94 N.
What is the net force on q1?From Coulomb's Law, the force between two point charges is given by:
F = (k * q1 * q2) / r²where;
F is the force,k is Coulomb's constant (9 * 10⁹ N * m²/C²),q1 and q2 are the charges,r is the distance between the charges.All the charges have the same charge and magnitude and are separated by the same distance.
The force between q1 and q2 is:
F12 = (9 * 10⁹ N * m²/C²) * (-2.35 x 10⁻⁶ C)² / (0.100 m)²
F12 = 4.97 N
The positive sign indicates that the force is repulsive
Similarly, the force between q2 and q3 is:
(9 * 10⁹ N * m²/C²) * (-2.35 x 10⁻⁶ C)² / (0.100 m)²
F12 = 4.97 N
The positive sign indicates that the force is repulsive
The net force on q1 will be:
Fnet = F12 + F23
Fnet = 4.97 N + (4.97)
Fnet = 9.94 N
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Explain the theory of plate tectonics and how they have changed Earth’s surface over time. Include the role of plate tectonics in the creation of landforms.
Answers
Plate tectonic theory is the movement of the plates or slabs of rigid rocks over the surface of the earth or the molten rocks that is the mantel.
It explains how the continents have drifted over time due to the changes in the earth's geology over the years. It also explains how earthquakes, volcanic eruptions, and mountain ranges are created. Hence the arrangement and formation of the present shape of the earth continents.Learn more about plate tectonics and how they have changed Earth.
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3. Looking at the image below label the areas of highest and lowest kinetic energy of both gravitational potential
energy
+PE = Max Potential Energy
-PE = Least Potential Energy
+KE = Max Kinetic Energy
-KE = Least Kinetic Energy
IKE = Increasing Kinetic Energy
DKE = Decreasing Kinetic Energy
Answers
Explanation:
max potential your welcome i love helping outhers :)
Please solve this.. I can't find R_th and V_oc at 6kohm....
Answers
The current I through the 4 kΩ resistor in the original circuit is 0.199 mA.
Thévenin's theorem states that any linear network of voltage and current sources and resistors can be replaced by an equivalent circuit consisting of a single voltage source and a single resistor. The equivalent circuit provides the same output voltage and current as the original circuit for any external load connected to it.
To find the current I in the circuit using Thévenin's theorem, we need to follow these steps:
Step 1: Find the Thévenin equivalent voltage (Vth) across the 4 kΩ resistor.
To find Vth, we need to first find the open circuit voltage (Voc) across the 4 kΩ resistor. We can do this by removing the 4 kΩ resistor and finding the voltage between its two terminals using a voltage divider:
Voc = 6 kΩ/(2 kΩ + 6 kΩ) x 2 mA = 1.2 V
Next, we need to find the Thévenin equivalent resistance (Rth) across the 4 kΩ resistor. To do this, we need to short-circuit all the independent voltage sources (in this case, there is only one) and find the equivalent resistance seen from the terminals of the 4 kΩ resistor. With the 2 mA current source shorted out, the 2 kΩ and 4 kΩ resistors are in parallel:
Rth = 2 kΩ || 4 kΩ = 1.33 kΩ
Step 2: Replace the original circuit with the Thévenin equivalent circuit.
We can now replace the original circuit with the Thévenin equivalent circuit, which consists of a voltage source Vth = 1.2 V in series with a resistor Rth = 1.33 kΩ.
Step 3: Find the current I through the 4 kΩ resistor in the Thévenin equivalent circuit.
To find the current I, we can use Ohm's law:
I = Vth/(Rth + 4 kΩ) = 1.2 V/(1.33 kΩ + 4 kΩ) = 0.199 mA
Therefore, the current I through the 4 kΩ resistor in the original circuit is 0.199 mA.
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Airflow lifts a 3.6 kg bird 50 m up. How much work was done by the flow?
Answers
If airflow lifts a 3.6 kg bird 50 m up, then the work done by the airflow is 1764 joules.
Given,
Mass of the bird = 3.6 kg,displacement covered by the bird due to airflow d) = 50 m,Work done against the friction (W) =?
We know that :
Work done against the friction (W) = force × displacement
W = F × d
W = m × g x d [ Force = mass × acceleration due to gravity ]
W = 3.6 × 9.8 × 50 [ g = 10 m/s2 ]
W = 1764 joules
Hence, the work done by the airflow is 1764 joules.
A force is an influence that has the power to alter an object's motion. A force can cause an object with mass to accelerate when it changes its velocity, for as when it moves away from rest.
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The picture shows two solutions of salt water. Which solution is more concentrated (has a higher concentration)?
Question 15 options:
The first solution is more concentrated
The second solution is more concentrated
The solutions have the same concentration.
Answers
In order to determine which of the two solutions of salt water is more concentrated, we need to first understand what concentration means and how it is measured. Concentration refers to the amount of solute dissolved in a given amount of solvent. It is typically measured in units of mass per volume, such as grams per liter (g/L) or milligrams per milliliter (mg/mL). so The second solution is more concentrated
When comparing the concentration of two solutions, the one with a higher concentration has more solute dissolved in the same amount of solvent. Therefore, in the picture provided, we can determine which solution is more concentrated by looking at the relative amounts of solute in each solution.If the solutions have the same concentration, then they must have the same amount of solute dissolved in the same amount of solvent. From the picture, we can see that both solutions are in the same size container and have the same amount of solvent (water) in them. Therefore, we can conclude that they have the same concentration of salt.The amount of solute dissolved in a solution can be increased by either adding more solute or by reducing the amount of solvent. If we were to add more salt to one of the solutions, we would increase the concentration of that solution. Alternatively, if we were to evaporate some of the water from one of the solutions, we would reduce the amount of solvent and increase the concentration of that solution.
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Once you have possession of the disk, you can run only 5 steps before you have to pass it to a teammate.
true
false
Answers
Answer:
If this is for Ultimate Frisbee, then FALSE
Explanation:
According to the rules, "In order for the disc to go from one player to another, it must at some time be in the air. No player may walk, run, or take steps in possession of the disc. The momentum of the receiver, however, must be taken into consideration." (crec.unl.edu) This means that if the player is already moving, they may take a maximum of two steps to come to a stop. (www.csun.edu).
.
.
.
Hope that helps?
How are magnetic fields like vectors?
Answers
Answer:Magnetic fields from two sources add up as vectors at each point, so the strength of the field is not necessarily the sum of the strengths1. Magnetic fields are vectors, which means they have direction as well as size. Therefore, the sum of two magnetic fields is not simply the sum of their magnitudes2.
Explanation:
Directions: Read the following excerpts carefully, then identify whether they employ informative, persuasive, or argumentative writing technique.
ENGLISH Subject:
I am really confused, might anyone know?
Answers
Hi there!
Informative writing has the intent to inform or educate us on a particular topic or event. It gives us more information and insight onto something.
Persuasive writing has the intent of convincing us to believe in a certain idea or to perform a certain action. For instance, advertisements have a persuasive intent; they are persuading us to buy a product or service.
Argumentative writing is similar to persuasive writing in the sense that they are persuading us to believe a certain idea. However, they are often based on logic and fact rather than opinions.
Let's look at the first excerpt.
This morning at 9 a.m., a school bus collided with a car at the intersection of Osmena and Cabrera streets. The passengers were not injured, but the medical personnel checked each student as well as the driver before they were transported to their school.
This text doesn't try to convince us in believing something. It doesn't argue anything and it only tries to give us more insight onto the event, which is a car accident. No opinions are stated and only events are given.
Therefore, this excerpt uses an informative writing technique.
Answer:
1. Informative
2. Persuasive
3. Informative
4. Persuasive
5. Argumentative
Explanation:
Informative is a way to inform the audience on a particular topic throughout the reading. Common examples of an informative paragraph would be to inform people on different situations around the world or a news outlet some would say.
Persuasive is a way to convince one to change/commit an act of sorts. Through persuasion you can convince your audience to look at a situation from a different perspective and perhaps convince the person to be more willing to do change the way they do something else. Common example of a persuasive paragraph would be trying to persuade someone to use less water through telling them the importance of water conservation and how water is a nonrenewable source.
Argumentative somewhat similar to persuasive but is more assertive you are trying to convince the audience why the side you're apart of is more better then the opposite side through a means of ethos, pathos, and logos. Common example of a argumentative paragraph would be something like why pizza is better then hamburgers.
Now that we know this information it's time to answer:
Excerpt one:
Excerpt one is known "informative excerpt" because we are informing the readers about how a school bus collided with a car nearby, and how thankfully none of the passengers were injured.
Excerpt two:
Excerpt two would be known as a "persuasive writing." We aren't trying to convince the audience on our side of donating blood so this won't be an argumentative writing, we are trying to persuade them by saying the benefits of how donating blood can save a person's life.
Excerpt three:
Excerpt three would be known as an "informative writing." We aren't trying to persuade or convince we are trying to inform the audience of the dangers of drinking while in high school by listing all the negative effects drinking has on a highschooler like unsafe encounters.
Excerpt four:
Excerpt four would be known as an "persuasive writing." This writing is trying to convince the reader about how the death penalty is a good punishment for criminals because the bible says an eye for an eye and how we should keep it on the books.
Excerpt five:
The final excerpt will be known as an "argumentative writing." This writing is again assertive, and it lists both sides of the spectrum how parents won't let their children study abroad because of how expensive it costs for things like tuition, food, shelter along with other necessities. It even goes as far as stating it's own position by saying how it's expensive to study abroad.
Hope this helps.
A magnetic field is entering into a coil of wire with radius of 2(mm) and 200 turns. The direction of magnetic field makes an angle 25° in respect to normal to surface of coil. The magnetic field entering coil varies 0.02 (T) in every 2 seconds. The two ends of coil are connected to a resistor of 20 (Ω).
A) Calculate Emf induced in coil
B) Calculate the current in resistor
C) Calculate the power delivered to resistor by Emf
Answers
Answer:
a) 2.278 x 10^-5 volts
b) 1.139 x 10^-6 Ampere
c) 2.59 x 10^-11 W
Explanation:
The radius of the wire r = 2 mm = 0.002 m
the number of turns N = 200 turns
direction of the magnetic field ∅ = 25°
magnetic field strength B = 0.02 T
varying time = 2 sec
The cross sectional area of the wire = \(\pi r^{2}\)
==> A = 3.142 x \(0.002^{2}\) = 1.257 x 10^-5 m^2
Field flux Φ = BA cos ∅ = 0.02 x 1.257 x 10^-5 x cos 25°
==> Φ = 2.278 x 10^-7 Wb
The induced EMF is given as
E = NdΦ/dt
where dΦ/dt = (2.278 x 10^-7)/2 = 1.139 x 10^-7
E = 200 x 1.139 x 10^-7 = 2.278 x 10^-5 volts
b) If the two ends are connected to a resistor of 20 Ω, the current through the resistor is given as
\(I\) = E/R
where R is the resistor
\(I\) = (2.278 x 10^-5)/20 = 1.139 x 10^-6 Ampere
c) power delivered to the resistor is given as
P = \(I\)E
P = (1.139 x 10^-6) x (2.278 x 10^-5) = 2.59 x 10^-11 W
1. A ball is at rest on the top of a hill (see the figure).
At the top of the hill, the ball will have [the maximum value of its, no, the minimum value of its] gravitational potential energy and [no, the maximum value of its] kinetic energy. If the ball rolls down the hill then, its [gravitational potential energy, kinetic energy] is converted to [gravitational potential energy, kinetic energy] when it gets to the ground.
2. Get your stopwatch ready and prepare to drop the object from the height h you selected in the previous step. You should drop the object so its [bottom, top, middle] part is initially at the height h. The initial speed of the ball [zero, 9.8 m/s, 9.8 m/s^2, depends on the height h] You'll need to measure the time from when the ball leaves your hand to exactly when it hits the ground [ for the first time it bounces, after it bounces and then comes to rest, both the first time and then after it bounces; then average the two times]
.
Answers
2. When dropping the object, you should drop it so its top part is initially at the height h. The initial speed of the ball will be zero since it starts from rest. To measure the time it takes for the ball to hit the ground, you should start the stopwatch when the ball leaves your hand and stop it when the ball hits the ground for the first time. It is recommended to perform multiple trials and calculate the average time to minimize errors.
When an object levitates, the magnetic force causes the object to repel. Without this magnetic force, ________ would pull the object down.
Answers
Answer:
gravity
Explanation:
I don't know what the explanations would be
Your car gets a flat! You go from 90 kilometers per hour to a stop in 6 seconds. What is your rate of deceleration?
Answers
Answer:
The rate of deceleration is 15 km/h^2.
Explanation:
Since the car comes in 90km/h, it will need deceleration for 15 km/h for 6 seconds to finally stop the car. 15*6=90
HELP PLEASEEEEEE HELP PLEASE
Answers
The letter that represents the various descriptions is as follows:
5.) Angle of incidence: B
6.) Object: D
7.) Plain mirror:A
8.) Reflection: E
9.) Angle of reflection: C
10.) Normal: F
How does the diagram explain the law of reflection?The law of reflection in a plain mirror states that the angle of reflection is equal to the angle of incidence.
The diagram explains the law of reflection on a plain mirror because it shows the reflection of the object D as E after creating an angle of incidence B on the plane mirror surface A which is equal to the angle of reflection C.
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i need help question confuseing
Answers
Answer:
could you tell me what the question is pls, that way I can help you
Explanation:
what do you mean by kinetic energy and potential energy ?
state the formulas used to calculate them !
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ty! :)
Answers
Where,
. m is the mass in kilograms
. g is the acceleration due to gravity
. h is the height in meters
Hope it helpz~ uh..
2. Gerard is riding his bicycle directly east. His maximum
instantaneous velocity was 8 meters per second and his
minimum instantaneous velocity was 0 meters per second. He
covered 7.20 kilometers in 20.0 minutes. What is his average
velocity for the ride?
Answers
Gerard's average velocity for the ride is 6 meters per second.
To find Gerard's average velocity for the ride, we can use the formula:
Average velocity = Total displacement / Total time
First, we need to convert the distance traveled from kilometers to meters:
7.20 kilometers * 1000 = 7200 meters
Next, we convert the time from minutes to seconds:
20.0 minutes * 60 = 1200 seconds
Now, we can calculate the total displacement by subtracting the initial position from the final position. Since Gerard is riding directly east, there is no change in the east-west direction, so the displacement is equal to the distance traveled:
Total displacement = 7200 meters
Finally, we substitute the values into the average velocity formula:
Average velocity = 7200 meters / 1200 seconds
Average velocity = 6 meters per second
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When you sweat, what is the external stimuli? I need help asap.
Answers
Answer:
An External Stimulus is a stimulus that comes from outside an organism. Examples: You feel cold so you put on a jacket. When you sweat, the external stimulus is either you're anxious or hot.
Explanation:
hope it helps! <3
A cannon sends a projectile towards a target a distance 1270 m away. The initial velocity makes an angle 26◦ with the horizontal. The target is hit. The acceleration of gravity is 9.8 m/s^2. How high is the highest point of the trajectory?
(Note the magnitude of the initial velocity is 125.6749804)
Answers
The maximum height achieved by the projectile shot at an angle of 26° with the horizontal is 155.79 meters.
What is Projectile Motion?
Projectile motion is a form of motion experienced by an object or particle that is projected near earth's surface and moves along a curved path under the action of gravity only.
Given is a projectile projected towards a target a distance 1270 m away. Initial velocity of the projectile is 125.6 m/s and makes an angle 26° with the horizontal.
The vertical component of the initial velocity →
u[y] = 125.6 sin(26°) = 125.6 x 0.44 = 55.26 m/s.
The horizontal component of the initial velocity →
u[x] = 125.6 cos(26°) = 125.6 x 0.89 = 111.78 m/s
Horizontal distance covered →
h[x] = 1270 m
Time taken to travel the horizontal range →
t = h[x] / u[x]
t = 1270 / 111.78 = 11.36 seconds
The time at which the height is maximum →
t [max] = 11.36/2 = 5.68 s
Using Newton's second law of motion for vertical direction -
S[y] = u[y] t + 1/2 a[y] t²
At t = t [max], the vertical height will be maximum -
S[y] (max) = 55.26 x 5.68 - 1/2 x 9.8 x 5.68 x 5.8 =
S[y] (max) = 313.87 - 158.08
S[y] (max) = 155.79 meters.
Hence, the maximum height achieved by the projectile shot at an angle of 26° with the horizontal is 155.79 meters.
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