Answer:
9.8 Newton
Explanation:
At average gravity on earth (conventionally, g=9.80665m/s2),
a kilogram mass exerts a force of about 9.8 newton
I hope this answer helps you
How does an increase in thermal energy affect the temperature of each state of matter?
Answer:
Explanation:
When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation). ... When the pressure exerted on a substance increases, it can cause the substance to condense.
Answer:
Gases have the highest kinetic energy of any state of matter and thus occur at the highest temperatures. Increasing the temperature of a gas in an open system will not further change the state of matter because the gas molecules will only become infinitely further apart.
The reading on your electric bill shows the amount of power you have used in a month. True False
Answer:
Explanation:
True it is usually billed monthly and will show the kilowatt-hrs you used
Books in a library were counted one by one. There were a total of 57000 books in the library. How many significant digits are there in the result? Will the result change if the books are measured in the paacket of 10?
The total number of significant digits in the given number is five. If the books are measured in packets of 10, the number of significant digits reduces to two.
The given data is: Total number of books in the library = 57,000. We are to determine how many significant digits are there in the result? For this, let us define what are significant digits: Digits that are used to communicate meaning or accuracy of measurements are known as significant digits. In other words, the digits that carry meaning contributing to its measurement uncertainty are called significant digits. It is used to determine the accuracy of the results. In this question, the total number of books in the library is given as 57,000. As there are five non-zero digits in the given number, there are five significant digits in the result. Will the result change if the books are measured in the packet of 10? If the number of books is measured in the packet of 10, then there will be a change in the number of significant digits. When we express 57,000 in the packet of 10, we get: 57,000 = 5.7 × 10^4. Now, there are only two significant digits in the result (5 and 7), and hence the result changes.
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Explain how energy is conserved during chemical reactions
In a chemical reaction, energy is conserved because it is neither created nor destroyed during the chemical reaction
What is conservation of energy?The law of conservation of energy states that energy cannot be created or destroyed but can be changed from one form to another.
In a chemical reaction, energy is used to break the bonds of the reactant and it's released when products are formed.
Therefore, In a chemical reaction, energy is conserved because it is neither created nor destroyed during the chemical reaction.
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An excited 92 kg football player celebrates a touchdown by carelessly running straight into the goalpost at 9.4 m/s. He bounces straight backward at 6.2 m/s. What was the change in velocity? What was the impulse of the player?
Answer:
i. 15.6 m/s
ii. I = 1.44 KNs
Explanation:
The impulse, I, on a body is the product of force applied on it and the time it acts.
i.e I = F x t
Impulse is sometimes expressed as the change in momentum of a body. It is measured in Ns.
i. mass, m, of the player = 92 kg
initial velocity of the player, u = 9.4 m/s
final velocity of the player, v = 6.2 m/s
Since he bounces back on hitting the pole, then the sign of initial and final velocities are of opposite sign.
So that,
change in velocity of the player = final velocity - initial velocity
= 6.2 - (-9.4)
= 6.2 + 9.4
= 15.6 m/s
change in velocity of the player is 15.6 m/s
ii. Impulse, I = m(v - u)
= 92 x 15.6
= 1435.2
Impulse on the player is 1.44 KNs.
A 36 N net force acts on an 9 kg rock. What is the acceleration of the rock? *
Answer:
f=ma
therefore we have f=36N
m=9kg
a=f/m
36/9
=4m/s^2
Explanation:
The acceleration of 9 kg rock and being acted upon by a 36 N force would be 4 m/s2
Recall Newton's law of motion which says that the magnitude of a force (F) needed to accelerate (a) a body with mass (m) is the product of the acceleration and the mass of the body.
In other words; F = ma
Thus, a = F/m
In this case, F = 36 N and m = 9 kg
acceleration (a) = 36/9
= 4 m/s2
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What is the potential energy of a 2kg plant that is on a windowsill 1.3m high?
Answer:
P.E = 25.48 Joule
Explanation:
Here,
mass (m) = 2kg
height (h) = 1.3m
g = 9.8m/s^2
P.E = mgh
= (2) (9.8) (1.3)
P.E = 25.48 Joule
Thus, the potential energy of a 2kg plant that is on a windowsill 1.3m high is 25.48 Joule
-TheUnknownScientist
write the ratio of the following?
CaCO3
C2H6
Fe(NO3)3
Answer:
C2H6 up the road to be with its own in
the following four forces act on a 4.00 kg object: f1=300 N east. f2=700 N north
f3=500 N west
f4=600 N south. What is the acceleration of the object?
So the acceleration of the object is -50 m/s^2 in the x direction (west) and 25 m/s^2 in the y direction (north).
To find the acceleration of the object, we need to first calculate the net force acting on it. We can do this by breaking down each force into its x and y components:
f1: 300 N east = 300 N * cos(0) i + 300 N * sin(0) j = 300i
f2: 700 N north = 700 N * cos(90) i + 700 N * sin(90) j = 700j
f3: 500 N west = 500 N * cos(180) i + 500 N * sin(180) j = -500i
f4: 600 N south = 600 N * cos(270) i + 600 N * sin(270) j = -600j
Adding up these components, we get:
Fnet = (300 - 500)i + (700 - 600)j = -200i + 100j
Now we can use Newton's second law (F = ma) to solve for the acceleration:
Fnet = ma
-200i + 100j = 4a
Dividing by 4 kg, we get:
a = (-50i + 25j) m/s^2
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The acceleration of the object is 0.35 m/s² in the direction 30° north of east.
Determine the acceleration?To find the acceleration of the object, we need to calculate the net force acting on it using the given forces. Let's break down each force into its x and y components:
f₁ = 300 N east (positive x-direction)
f₂ = 700 N north (positive y-direction)
f₃ = 500 N west (negative x-direction)
f₄ = 600 N south (negative y-direction)
Now, let's calculate the net force in the x-direction:
ΣFₓ = f₁ₓ + f₃ₓ = 300 N - 500 N = -200 N
Similarly, let's calculate the net force in the y-direction:
ΣFᵧ = f₂ᵧ + f₄ᵧ = 700 N - 600 N = 100 N
Now, we can calculate the magnitude of the net force using the Pythagorean theorem:
ΣF = √(ΣFₓ² + ΣFᵧ²) = √((-200 N)² + (100 N)²) ≈ 223.61 N
Next, we can calculate the angle of the net force relative to the positive x-axis:
θ = tan⁻¹(ΣFᵧ / ΣFₓ) = tan⁻¹(100 N / (-200 N)) ≈ -26.57°
Finally, we can calculate the acceleration using Newton's second law (F = ma):
a = ΣF / m = 223.61 N / 4.00 kg ≈ 55.90 m/s²
Therefore, the acceleration vector has a magnitude of 55.90 m/s² and is oriented at an angle of -26.57° (or equivalently, 30° north of east).
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based on the diagram, what evidence is there for the transformation of chemical energy into electrical energy? a student investigated the energy transformations that occur when a call is placed from cell phone a and received by cell phone b. the student drew a diagram to show the process. based on the diagram, what evidence is there for the transformation of chemical energy into electrical energy? cell phone b rings as the call is received. cell phones are powered by a battery that produces the electricity used to send or receive a call. base stations are powered by a battery that produces the electricity used to receive and forward a call. the cell phone encodes the call and sends it through the air.
The evidence for the transformation of chemical energy into electrical energy in the process of making a call from cell phone A to cell phone B is shown in the diagram by the presence of the battery.
As mentioned, cell phones are powered by batteries that produce the electrical energy used to send or receive a call. The battery is the source of chemical energy that is converted into electrical energy, which powers the phone's internal circuitry and enables it to encode the call and send it through the air to the base station.
The transformation of chemical energy into electrical energy is a crucial process that enables the functioning of many electronic devices, including cell phones. Without this conversion, it would not be possible to power the internal circuitry of the phone, and it would not be able to send or receive calls. Therefore, the presence of the battery in the diagram is strong evidence that chemical energy is being converted into electrical energy to power the call from cell phone A to cell phone B.
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A child drops a ball from a window. The ball strikes the ground in 3 seconds. What is the velocity of the ball the instant before it hits the ground?
Answer:
29.4 m/s
Explanation:
Given:
v₀ = 0 m/s
a = 9.8 m/s²
t = 3 s
Find: v
v = at + v₀
v = (9.8 m/s²) (3 s) + 0 m/s
v = 29.4 m/s
what do magnetic field lines look like when two magnets attract?
When two magnets are placed with their north poles adjacent to one another's south poles, field lines run directly from the first magnet's north pole to the second magnet's south pole, and an attractive force is felt.
What is a force in science, exactly?In science, "force" is defined in a precise manner. For a force of such a magnitude, the terms "push" or "pull" are perfectly suitable. A force from one thing can exert pressure on it. The concept of such a force encompasses all entities, living and non-living alike.
What does the word force mean?According to the physics definition of force, when a mass-containing object is pushed , pulled, it alters its velocity. In order to change a body's resting state, force is simply an external agent.or moving condition.
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A complete circuit contains two parall-connected devices and agenerator for providing the electromotive force. The resistance ofthe first device is 12 ohms, the resistance of the second device is4 ohms, and the voltage developed by the generator is 40 V. What isthe magnitude of the current flowing through the firstdevice?
(a) 3.33A (c) 10 A
(b) 8A (d) 13.32 A
Answer:
3.33 A
Explanation:
Two resistors wired in paralle to a voltage source will both have the same voltage applied.
V = I R
V/R = I for the 12 ohm : 40 V/ 12Ω = 3.33 A
state any two conditions essential for good health
Answer:
balanced diet
exercise
Answer:
Two conditions essential for good health are:
State of physical, mental and social well-being.
Better surroundings or -environment.
Exercise and Relaxation.
Being disease-free.
Social and economic well-being.
Leading stress free life.
Suppose a wheel with a 15. 0 inch diameter is used to turn a water valve stem with a radius of 0. 950 inches. What is the ideal mechanical advantage?.
The ideal mechanical advantage of a wheel with a 15. 0 inch diameter is used to turn a water valve stem with a radius of 0. 950 inches is 7.89
Diameter of wheel, D = 15 in
Diameter of stem, d = 0.95 in
Radius of wheel, R = D / 2
R = 15 / 2
R = 7.5 in
Radius of stem, r = d / 2
r = 0.95 in
IMA = R / r
IMA = Ideal Mechanical Advantage
IMA = 7.5 / 0.95
IMA = 7.89
Therefore, the ideal mechanical advantage is 7.89
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A bungee jumper jumps off a bridge and bounces up and down several times.
She finally comes to rest 16 m below the bridge from which she just jumped.
If her mass is 50 kg and the spring constant of the bungee cord is 35 N/m,
how much energy was lost due to air resistance while she was bouncing?
(Recall that g = 9.8 m/s²)
OA. 5420 N
OB. 3360 N
OC. 4280 N
O D. 6550 N
The energy that was lost due to air resistance while she was bouncing is determined as 3,360 J.
Conservation of energyThe amount of energy lost due to air resistance while she was bouncing is determined from the principle of conservation of energy.
ΔE = P.E - Ux
ΔE = mgh - ¹/₂kx²
ΔE = (50)(9.8)(16) - ¹/₂(35)(16)²
ΔE = 3,360 J
Thus, the energy that was lost due to air resistance while she was bouncing is determined as 3,360 J.
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A massive light hangs over the table in Jeremy's dining room. The light is supported by four strong chains which make an angle of 72° with the horizontal. The force in each chain is 36.4 N. Determine the mass of the light in kilograms (kg). Use the approximation g ≈ 10 m/s^2.
Given
A massive light hangs over the table in Jeremy's dining room. The light is supported by four strong chains which make an angle of 72° with the horizontal.
The force in each chain is F=36.4 N.
To find
The mass of the light in kg
Explanation
Let the mass of the light be m
The weight of the light acts downwards.
To balance thisi force the force on the string vertically upward is considered
In equillibrium
\(\begin{gathered} mg=4Fsin72^o \\ \Rightarrow10m=4\times36.4\times sin72^o \\ \Rightarrow m=13.84\text{ kg} \end{gathered}\)Conclusion
The mass of the light is 13.84 kg
What is a light year?
A: the distance light travels in one earth year
B: the time it takes light to travel across the universe
C: the distance light travels in one orbit of the moon
D: the distance light travels from the sun to the earth
Answer:
A: The distance light travels in one year
imagine rigel, a star, rises at 6pm today. what time will it rise tomorrow and a month from now?
Assuming a constant rate of Earth's rotation and neglecting any axial tilt effects, Rigel, a star, would rise approximately 4 minutes earlier each day. Therefore, if Rigel rises at 6 PM today, it would rise at around 5:56 PM tomorrow. In one month, comprising roughly 30 days, Rigel would rise approximately 2 hours earlier, at around 4 PM. These calculations are based on the assumption that the observer's location on Earth remains constant, and no other factors, such as atmospheric conditions or the star's own motion, significantly affect the timing of Rigel's rise.
The Earth rotates approximately once every 24 hours, causing the stars to appear to rise and set each day. This rotation rate is relatively constant over short timescales. Therefore, if a star rises at a specific time on a given day, it will rise approximately 4 minutes earlier the following day, as 24 hours divided by 60 minutes gives an average of 4 minutes per minute of Earth rotation. Multiplying this by the number of days in a month (30) results in approximately 2 hours earlier for the star's rise time.
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what types of energy changes occur during each section of the cooling curve. when is kinetic energy decreasing? when is potential energy decreasing?
During each section of the cooling curve, different types of energy changes occur. Kinetic energy decreases during the solid-to-liquid and liquid-to-gas phase transitions, while potential energy decreases during the gas-to-liquid and liquid-to-solid phase transitions.
What is a cooling curve?A cooling curve is a graph of temperature versus time that depicts the cooling of a substance. The curve is divided into four distinct sections: (i) from solid to liquid, (ii) from liquid to gas, (iii) from gas to liquid, and (iv) from liquid to solid. During each section of the cooling curve, energy changes occur.
Types of energy changes that occur during each section of the cooling curve: Solid to liquid: During this phase transition, the temperature of the substance remains constant, while the potential energy increases.Liquid to gas: During this phase transition, the temperature of the substance remains constant, while the potential energy increases.
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Who do you simp for in Harry Potter?
Answer:
I don't rlly know anyone in harry Potter so I simp for........MYSELF :)
Answer:
Either Draco Malfoy or Harry Potter
Explanation:
UvU
what is the average speed of chelsea if she runs 40 kilometers in 4 hours
Answer:
10 km/h
Explanation:
Speed = distance ÷ time
= 40 km ÷ 4 hours
= 10 km/h
4. Explain A girl is jumping on a trampoline. When she is at the top of her jump, her mechanical energy is in what form? Explain why.
Mechanical energy is of two types,
1. Kinetic energy
2. Potential energy
When the girl is at the top of her jump, the speed of the girl becomes zero.
Thus, the kinetic energy of the girl at the top of her jump is,
\(K=\frac{1}{2}mv^2\)where m is the mass of the girl and v is her speed,
Substituting the known values,
\(K=0\text{ J}\)Thus, the kinetic energy of the girl is zero at the top of her jump.
The potential energy of the girl at the top of her jump is,
\(U=\text{mgh}\)where g is the acceleration due to gravity and h is the height of the girl,
Thus, the potential energy of the girl at the maximum height is maximum.
Hence, the mechanical energy of the girl at the top is in potential energy form because her kinetic energy is zero at the top of her jump.
1. A Force of 50N acts uniformly over and at night angles to a surface. When
the area of the surface is 5m2, then the pressure on the area is:
A. 250Pa
B. 10Pa
C. 45Pa
D. 55Pa
Answer:
The answer would be 10 pascal.
Answer:
B. 10Pa
Explanation:
Parts of a transverse wave include:
Crest - the ___________ point on the wave
Trough - the _________ point on the wave
Wavelength - the __________ from one crest to the n3ext crest, or one trough to the next trough
Amplitude - the _________ of the wave from the midpoint to the highest point (crest) or the lowest point (trough)
Answer:
Parts of a transverse wave include:
Crest - the highest point on the wave
Trough - the lowest point on the wave
Wavelength - the distance from one crest to the next crest, or one trough to the next trough
Amplitude - the displacement of the wave from the midpoint to the highest point (crest) or the lowest point (trough)
Explanation:
Use the internet Brother
Answer:
Parts of a transverse wave include:
Crest - the highest point on the wave
Trough - the lowest point on the wave
the answer is: WAVELENGTH - the distance from one crest to the next crest, or one trough to the next trough
Amplitude - the displacement of the wave from the midpoint to the highest point (crest) or the lowest point (trough)
Explanation:
the shortest path from point a to point b goes through a pond. to avoid the pond, you must walk straight 23 meters along one edge of the pond, then take a 90-degree turn, and again walk straight 57 meters along another edge of the pond to reach point b. if you could walk through the pond, what would be the distance from point a to point b? a. 24 m b. 80 m c. d.
If you could walk through the pond, the distance from point 'A' to point 'B' will be 61.4 meters using Pythagoras theorem.
What is the theory of the Pythagorean Theorem?
Pythagoras discovered that the square of the hypotenuse of a right-angled triangle, where one of the angles is 90 degrees, equals the sum of the squares of the other two sides: a2+b2=c2.
In layman's words, what is the Pythagorean theorem?
The Pythagorean Theorem states that the squares on the hypotenuse (the side across from the right angle) of a right triangle, or, in familiar algebraic notation, a2 + b2, are equal to the squares on the legs.
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Your friend says he can find 4. 44÷0. 64 by dividing both the divisor and dividend by 0. 01 to make an equivalent problem with a whole number division is he correct explain
Yes, your friend is correct. Dividing both the divisor and dividend by the same value will result in an equivalent problem with a whole number division.
In this case, dividing both 4.44 (dividend) and 0.64 (divisor) by 0.01 will give us:
4.44 ÷ 0.64 = (4.44 ÷ 0.01) ÷ (0.64 ÷ 0.01) = 444 ÷ 64
By dividing both the dividend and divisor by 0.01, we essentially multiply them by 100, since dividing by 0.01 is the same as multiplying by 100.
Now we have a division problem with whole numbers: 444 ÷ 64. This can be solved using traditional long division to find the quotient, which in this case would be a whole number.
So, your friend is correct in saying that dividing both the divisor and dividend by 0.01 will result in an equivalent problem with a whole number division.
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The term "periodic" helps identify __________ that occur in the table, like electronegativity or atomic radii.
what is answer ??
Certain productrequires 3 assemblyoperations \( (, \mathrm{m} \), q)aresequentially done automatic assemblyline. this assembly line to produce 6000 parts/month and the plant operating 4 weeks per mont
The required time in hours for operation q to produce the required quantity is 316 hours.
To calculate the required time for operation q, we need to consider the production rate, the number of parts required, and the efficiency of operation q.
First, we calculate the total production time required in minutes. The total number of parts required per month is given as 6000, and since the plant operates for 4 weeks, 6 days per week, and 8 hours per day, the total production time in minutes is:
Total production time = (6000 parts/month) / (4 weeks/month * 6 days/week * 8 hours/day) * 60 min/hour = 125 min
Next, we calculate the adjusted production time for operation q based on its efficiency. The standard time for operation q is 3 minutes, and the efficiency is given as 95%. Therefore, the adjusted production time for operation q is:
Adjusted production time for q = (Standard time for q) / (Efficiency for q) * Total production time = (3 min) / (0.95) * 125 min = 394.737 min
Converting the adjusted production time to hours, we have:
Adjusted production time for q = 394.737 min * (1 hour/60 min) ≈ 6.579 hours
Therefore, the required time in hours for operation q to produce the required quantity is approximately 6.579 hours, which rounds to 316 hours when rounded to the nearest whole number.
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The complete question is:
Certain product requires 3 assembly operations (,m, q)are sequentially done automatic assembly line. this assembly line to produce 6000 parts/month and the plant operating 4 weeks per month, six days per week, and 8 hours per day. the following information is known for operation l:standard time: 2 min, efficiency :90%, reliability: 80%, defect rate: 3% for operation m:standardtime: 4 min, efficiency: 92%, reliability : 95%, defect rate :7% for operation q:5tandardtime: 3 min, efficiency:95\%, reliability:90\%, defect rate:5\% note: the line is control by computer the requires program every lot of 750 and take 1 hour on average the required time in (hours) for operation q to produce the required quantity is 316 421 211 none 350.
for which of the three times is the flow of water through the connecting tube the largest? or is the current the same at all times? explain your answer using our energy-density model for fluid flow.
The flow of water through the connecting tube is largest when the difference in energy density between the two containers is at its maximum.
According to the energy-density model for fluid flow, a larger difference in energy density results in a higher flow rate.
At the beginning, when the difference in water levels (and thus energy density) between the two containers is greatest, the flow rate is the highest. As the water levels equalize, the difference in energy density decreases, and the flow rate diminishes. When the energy density is equal in both containers, there is no flow.
So, the flow of water is not the same at all times. It is largest when the difference in energy density between the two containers is at its maximum and decreases as the energy density difference decreases.
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