A small glass bead has been charged to 1.9 nc. what is the strength of the electric field 2.0 cm from the center of the bead?
Answers
The electric field is 42750 N/C.
We need to know about the electric field to solve this problem. The electric field is the area that is affected by electric energy. The magnitude of the electric field can be determined as
E = k . Q / R²
where E is electric field, k is coulomb's constant (9 x 10⁹ Nm²/C²), Q is charge and R is radius.
From the question above, we know that
Q = 1.9 nC = 1.9 x 10¯⁹ C
R = 2 cm = 0.02 m
By substituting the parameters, we get
E = k . Q / R²
E = 9 x 10⁹ . 1.9 x 10¯⁹ / 0.02²
E = 42750 N/C
Hence, the electric field is 42750 N/C
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Related Questions
Every second the sun gives out 400 million joules of energy, but how much of that actually reaches the earth?
Answers
Answer:
about 50 million
Explanation:
100% guessing lol
Answer:
the best thing about this place was to have the kids to do it and
when classifying the 36 cells into their individual phases of mitosis, which phase had the highest representation of cells? (From the table on page 3)
Metaphase
Interphase
Prophase
Answers
When classifying the 36 cells into their individual phases of mitosis ,Inter phase had the highest representation of cells .So option B is correct.
Pro phase is the first phase of mitosis, and it is when the chromosomes condense and become visible. The nuclear envelope breaks down, and the spindle fibers form.
Meta phase is the second phase of mitosis, and it is when the chromosomes line up along the spindle fibers. The chromosomes are then pulled apart by the spindle fibers.
Ana phase is the third phase of mitosis, and it is when the chromosomes are pulled to opposite poles of the cell. The cell then begins to divide.
Telophase is the final phase of mitosis, and it is when the cell divides into two daughter cells. The chromosomes uncoil, and the nuclear envelope reforms.Therefore option B is correct.
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Jumping up before the elevator hits. After the cable snaps and the safety system fails, an elevator cab free-falls from a height of 30.0 m. During the collision at the bottom of the elevator shaft, a 87.0 kg passenger is stopped in 3.00 ms. (Assume that neither the passenger nor the cab rebounds.) What are the magnitudes of the (a) impulse and (b) average force on the passenger during the collision
Answers
Given that,Height from which the elevator is falling, h = 30.0 mMass of the passenger, m = 87.0 kgTime taken by the passenger to stop, Δt = 3.00 ms = 3.00 × 10⁻³ s(a) Impulse, I = Δp = mΔvWe know that, v = u + atwhere u = initial velocity = 0a = acceleration = g = 9.8 m/s²t = time taken = Δt = 3.00 × 10⁻³ s∴ v = 0 + gt = 9.8 × 3.00 × 10⁻³ = 2.94 × 10⁻² ms⁻¹∴ Δv = final velocity - initial velocity= 0 - 2.94 × 10⁻² = - 2.94 × 10⁻² ms⁻¹∴ Impulse, I = Δp = mΔv= 87.0 × (- 2.94 × 10⁻²)= - 2.55 N s(b) Average force on the passenger during the collision, F = Δp/ΔtWe know that,Δp = - 2.55 N sΔt = 3.00 × 10⁻³ s∴ Average force, F = Δp/Δt= (- 2.55)/(3.00 × 10⁻³)= - 850 NTherefore, the magnitudes of the impulse and the average force on the passenger during the collision are, (a) - 2.55 N s and (b) - 850 N, respectively.
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Which two statements are true about how a thermal power generation system works?
Heat energy is converted to mechanical energy and then electricity.
Steam spins a generator shaft turning turbine blades to create electricity.
Mechanical energy is converted to heat energy and then electricity.
Steam spins turbine blades, turning a generator shaft to create electricity.
Kinetic energy is converted to heat energy and then electricity.
Reset
Next
Answers
Answer:
Explanation:
Steam spins turbine blades, turning a generator shaft to create electricity.
Heat energy is converted to mechanical energy and then electricity.
if a car has a constant acceleration of 4 m/s^2, starting from rest, how fast is it traveling after 5 seconds?
Answers
Answer:
20 m/s
Explanation:
Recall that one of the equations of motions can be written:
v = u + at, (also see attached for reference)
Where,
v = final speed (we are asked to find this)
u = initial speed = 0 (because it starts from rest)
t = time taken = 5s
We simply substitute the given values into the equation:
v = u + at
v = 0 + (4)(5)
v = 20 m/s
Which statement identifies the purpose of the Declaration of Independence?
Answers
Answer:
\(Declaration \: of \: Independence \: can \: be \: refered \: to \\ \: the \: state \: of \: pronouncing \: or \: the \\ \: statement\: by \:the \: citizens \: of \: a \: country \:to \: be \: able \:to \: choose \: \: thier \: own \: government.\)
How do you do binomial expansion on a calculator?
Answers
Binomial Expansion is a mathematical technique that involves expanding a given expression with two terms (binomial) raised to a power. It can be useful in solving complex mathematical problems, but finding the expansion of a binomial expression by hand can be time-consuming and error-prone.
Fortunately, modern calculators can help simplify this process by providing built-in functions for binomial expansion. The specific method for using a calculator to perform a binomial expansion will depend on the type of calculator you have, but here is a general explanation for how it can be done:
Make sure your calculator is in the correct mode: Before using your calculator for binomial expansion, you need to make sure it is in the correct mode. For most calculators, this is the "math" or "algebra" mode.
Choose the correct function: Most calculators have a function specifically designed for binomial expansion, often referred to as the "binomial theorem" or "nCr" function. This function calculates the individual terms of the binomial expansion.
Input the binomial expression: Enter the binomial expression you want to expand, including the power to which it is raised. For example, if you want to expand (a + b)^3, enter (a + b) and then "^" followed by the power, "3".
Use the binomial theorem function: Apply the binomial theorem function to the expression. This will give you the individual terms of the expansion.
Verify the expansion: Compare the expansion generated by your calculator to a known result or to a binomial expansion table to make sure the expansion is correct.
Note: Not all calculators have a built-in binomial theorem function, so you may need to use a different method or software to expand binomials.
In conclusion, using a calculator to perform a binomial expansion can save time and reduce the risk of calculation errors. The specific steps may vary depending on the type of calculator you have, but the general idea is to choose the correct function and input the binomial expression.
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You are asked to determine the identity of an unknown liquid and can measure only one physical property. You hear the liquid and record that the liquid turns into vapor at 100°C.
Which physical property does this demonstrate?
A. Melting point
B. Boiling point
C. Ability to conduct electricity
D. Meltability
Answers
The answer is The boiling Point as the transition from liquid to gas occurs at the boiling point.
The actuality that it changes from liquid to vapor indicates that you are working with the substance's boiling point.
The material is pure if its temperatures does not change when it turns phases. Since water turns liquid at 100°C in this situation, water is likely the culprit.
The temperature at which a specific liquid will boil is known as its boiling point. For instance, water reaches its boiling point at 1 atm, or 100 degrees Celsius. The temperature of the liquid, the pressure of the atmosphere, and the pressure of the vapor all affect its boiling point.
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Where would you find information about an organization's guidelines for moral behavior?
Answers
a 1,400 kg car moving at 5.3 m/s is initially traveling north. after completing a 90o right-hand turn in 4.6 s, the inattentive operator drives into a tree, which stops the car in 350 ms. calculate the magnitude of the impulse delivered to the car (a) during the turn and (b) during the collision. calculate the average force acting on the car (c) during the turn and (d) during the collision.
Answers
a. The impulse acting on the car is 7.4×10³ N⋅s
b. The new impulse acting on the car is −7.4×10³ N⋅s.
c. The average force is 2.3×10³ N.
d. the new average force is 2.1×10⁴ N.
Let the initial and final momentum of the car be pi =mνi and pf =m νf, respectively. The impulse on it equals the change in its momentum, J =Δ p = pf − pi =m(νf − νi ). The average force over the duration Δt is given by Favg = J /Δt.
(a) The initial momentum of the car is pi =m νi =(1400kg)(5.3m/s)j^ =(7400 kg⋅m/s) j^ and the final momentum after making the turn is pf =(7400 kg⋅m/s) i^.
Thus, the impulse is, J = pf − pI =(7.4×10³ N⋅s)( i^ − j^ ) .
(b) The initial momentum of the car after the turn is pi' =(7400 kg⋅m/s) i^ and the final momentum after colliding with a tree is p f′ =0.
The impulse acting on it is J′ = pf′ − pi′ =(−7.4×10³ N⋅s) i^.
(c) the average force on the car during the turn is Favg = ΔtxΔ p = ΔtxJ = 4.6s(7400⋅m/s)( i^ − j^ ) =(1600N)( i^ − j^ ) and its magnitude is Favg=(1600N) 2 =2.3×10³ N .
(d) The average force during the collision with the tree is Favg′ = ΔtxJ' = 350×10 −3 s(−7400 kg⋅m/s) i^ =(−2.1×10⁴ N) i^ and its magnitude is F avg′
=2.1×10⁴ N.
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a
It do
While doing dishes, Zvi drops his
3.0x10 3kg platinum wedding band
into the dishwater, displacing a
volume of 1.40x107m3 of water,
what is the density of the platinum
band?
n
CSS c
sion
im
al
Select one:
a. 2.56x104 kg/m3
b. 1.0x104 kg/m3
Di
c. 0.5x104 kg/m3
IL
d. 2.14x104 kg/m3
IL:
Answers
Answer:
d. 2.14 x 10⁻⁴ kg/m³
Explanation:
Density is defined as the mass of an object per unit volume occupied by that object. The formula of density is, therefore, given as follows:
\(\rho = \frac{m}{V}\)
where,
ρ = density of platinum band = ?
m = mass of platinum band = 3 x 10³ kg
V = Volume displaced by Platinum band = 1.4 x 10⁷ m³
Therefore,
\(\rho = \frac{3\ x\ 10^{3}\ kg}{1.4\ x\ 10^{7}\ m^{3}}\\\\\rho = 2.14\ x\ 10^{-4}\ kg/m^{3}\)
Hence, the correct option is:
d. 2.14 x 10⁻⁴ kg/m³
use a chemical equation to show how potassium chloride dissociates in water
Answers
Explanation:
\(kcl - > {k}^{ + } + {cl}^{ - } \)
A container is filled with a mixture of helium and oxygen at the same temperature. The molar mass of helium is 4g mol^-1 and that of oxygen is 32 g mol^-1. What is the ratio of the average speed of helium molecules to the average speed of oxygen molecules?
Answers
Answer:2.83 times greater than the average speed of oxygen molecules at the same temperature.
Explanation:The ratio of the average speed of helium molecules to the average speed of oxygen molecules can be calculated using the root mean square (rms) velocity formula:
ratio of rms velocity = sqrt(M2/M1)
where M1 and M2 are the molar masses of the gases.
In this case, the ratio of the molar masses is M2/M1 = 32/4 = 8.
So, the ratio of the rms velocity of helium to oxygen is:
ratio of rms velocity = sqrt(8) = 2.83
Therefore, the average speed of helium molecules is about 2.83 times greater than the average speed of oxygen molecules at the same temperature.
a satellite at a particular point along an elliptical orbit has a gravitational potential energy of 5200 mj with respect to earth's surface and a kinetic energy of 4100 mj . later in its orbit the satellite's potential energy is 5600 mj . part a use conservation of energy to find its kinetic energy at that point. express your answer to two significant figures and include the appropriate units.
Answers
So the answer with two significant figures and appropriate units is Kinetic energy at second point is 3.7 x 10^6 J or 3.7 MJ.
What is kinetic energy?Kinetic energy is a form of energy that an object possesses by virtue of its motion. It is defined as the energy that an object has due to its mass and velocity. The formula shows that the kinetic energy of an object increases as its mass and velocity increase. For example, a heavy truck traveling at a high speed has a higher kinetic energy than a small car traveling at the same speed. The concept of kinetic energy is important in physics, as it is used to explain many phenomena, such as collisions, projectile motion, and the behavior of waves. It is also useful in engineering and other fields, as it helps to quantify the energy required for different types of motion, such as in machines or vehicles.
Here,
According to the law of conservation of energy, the total mechanical energy of a system remains constant if there are no external forces acting on the system. In the case of a satellite in an elliptical orbit around the Earth, the total mechanical energy is the sum of its kinetic energy and gravitational potential energy.
We can use this principle to solve for the kinetic energy of the satellite when its potential energy is 5600 MJ. We know that the total mechanical energy is conserved, so:
Total mechanical energy at first point = Total mechanical energy at second point
(KE + PE)1 = (KE + PE)2
Substituting the given values:
4100 MJ + 5200 MJ = KE2 + 5600 MJ
Simplifying:
KE2 = (4100 MJ + 5200 MJ - 5600 MJ)
KE2 = 3700 MJ
Therefore, the kinetic energy of the satellite at the second point is 3700 MJ. It's important to note that the units for energy are Joules (J), and mega-Joules (MJ) are equal to 1,000,000 Joules.
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Which of ONE of the following four elements has the most metallic properties?
The atomic numbers of the elements are listed below.
12
14
16
17
Answers
Answer:
12 (Magnesium- Mg)
Explanation:
Looking at the four numbers, we have:
Magnesium, Silicon, Sulfur, and Chlorine.
We can eliminate two of the answers immediately just by looking at the periodic table.
Sulfur and Chlorine are on the nonmetal side of the periodic table. So that's definitely not it. That leaves Magnesium and Silicon.
Silicon is a Metalloid. Magnesium is an Alkaline earth Metal.
Metaloids are elements that have a mix of both metal and nonmetal properties (luster, how it feels, etc.). Since it's a MIX and Magnesium is just straight METAL-
We can say Magnesium has the most metallic properties.
hope this helps!!
ou are testing a new car using crash test dummies. consider two ways to slow the car from 90 km/h (56 mi/h) to a complete stop: (i) you let the car slam into a wall, bringing it to a sudden stop. (ii) you let the car plow into a giant tub of gelatin so that it comes to a gradual halt. in which case is there a greater impulse of the net force on the car?
Answers
Both the situations will have same Impulse with no difference in two situations.
Given- The two ways to slow the car from 90 km/h (56 mi/h) to a complete stop.
To find the case in which there is a greater impulse of the net force on the car , following points needs to be covered in detail.
Impulse is the overall impact resulting to vehicle and its speed dependent parameter.\(\\\\I=mv\\Impulse= mass * Velocity\) In this case, it is considered that in the car, the movement is generated through speed and friction on the track, and it is the impact that makes the car stop, which is not part of the movement and therefore, not part of the impulse. In the two situations presented, the speed of the car is the same, the same car and the same track being used, shows that the impulse, in both situations, is the same.Impulse quantifies the overall effect and whether the car goes active or passive , it will remain unaffected.To understand more clearly about Impulse -
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In the middle of a thunderstorm, a lightning bolt flashes. It takes Roberto 5 seconds to
hear the thunder afterwards. How far is the source of lightning from Roberto? The temperature is 22° C.
Speed of sound at 22°C = ?
d = ?
You will be reported if you didn't answer properly
Answers
Answer:
v = 344.1 m / s
d = 1720.5 m
Explanation:
For this problem we must calculate the speed of sound in air at 22ºC
v = 331 RA (1+ T / 273)
we calculate
v = 331 RA (1 + 22/273)
v = 344.1 m / s
the speed of the wave is constant,
v = d / t
d = v t
we calculate
d = 344.1 5
d = 1720.5 m
if light with a 180 nm n m wavelength is absorbed by the surface, what is the velocity of the emitted electrons?
Answers
When light with a 180 nm wavelength is absorbed by the surface, the velocity of the emitted electrons is determined by the kinetic energy and momentum of the emitted electrons.
The photoelectric effect refers to the phenomenon in which the emission of electrons occurs from a metal surface when it is exposed to light. The electrons that are released in this process are referred to as photoelectrons.
According to the photoelectric effect equation, the kinetic energy of the photoelectrons (KE) is determined by the following equation:
KE = hf - Φ where h is Planck's constant, f is the frequency of the incident light, and Φ is the work function of the metal surface.
According to the photoelectric effect, the kinetic energy of the emitted electrons (KE) is given by the following equation:
KE = 1/2mv² where m is the mass of the electron and v is its velocity.
. The momentum of the emitted electrons is given by the following equation: p = mv where p is the momentum of the emitted electrons. Therefore, the velocity of the emitted electrons is given by the following equation: v = p/m. Thus, the velocity of the emitted electrons is determined by the kinetic energy and momentum of the emitted electrons.
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The complete question is :
The work function of palladium is 5.22 eV
a) What is the minimum frequency of light required to observe the photoelectric effect on Pd? ν = 1.26×\(10^{15} s^{-1}\)
b) If light with a 180 nm wavelength is absorbed by the surface, what is the velocity of the emitted electrons? Express your answer with the appropriate units
What is centripetal force and elastic force
Answers
Answer:
centripetal force is a net force that acts on an object to keep it moving along a circular path and elastic force acts to return a spring to its natural length
Is it true that acceleration occurs when there is a change in speed
Answers
Answer:
Acceleration is the rate of change of velocity.
Explanation: For example, acceleration is measured in m/2^2 or meters per second squared. That can also be split up into 2 components. M/s is how speed is measured, and since acceleration is the rate of change of velocity, m/(s*s). You could say that since acceleration is m/s^2, it can also be represented as how much the speed increases over 1 second. if there was an acceleration of 3 m/s^2, the rate of change of speed would be 3m/s every second, meaning that the object would speed up 3m/s every second that passes by.
Hope this helps!
When is it safer to drive a heavier car over a lighter car?
a. When you crash into a wall
b. When you crash into a tree
c. When you crash into another car
d. It is never safe in a hevaier car
Answers
Answer:
I think it would be c, crashing into another car
if you add a vector with a magnitude of 1 to a vector of magnitude 2, what magnitudes are possible for the vector sum?
Answers
If you add a vector with a magnitude of 1 to a vector of magnitude 2, the possible magnitudes for the vector sum range from 1 to 3.
This is because of the triangle inequality theorem.The triangle inequality theorem states that the magnitude of the sum of two vectors is less than or equal to the sum of their magnitudes. In other words, if we have two vectors A and B, then the magnitude of their sum C is given by:
|C| ≤ |A| + |B|
If we have a vector of magnitude 1, we can call it vector A. If we have a vector of magnitude 2, we can call it vector B.
Then the magnitude of their sum, vector C, is given by:|C| = |A| + |B|.
Since |A| = 1 and |B| = 2, we can substitute those values into the equation: |C| = 1 + 2
|C| = 3
Therefore, the maximum magnitude of the vector sum is 3.
However, the minimum magnitude of the vector sum is found when the vectors are pointing in opposite directions.
In this case, the magnitude of the sum would be:
|C| = |B| - |A|
|C| = 2 - 1
|C| = 1.
Therefore, the possible magnitudes for the vector sum range from 1 to 3.
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What kind of image is formed when an object is placed at the focal point of a convex lens? Explain WHY this is the image that occurs
Answers
Answer:
Since light does not actually pass through this point, the image is referred to as a virtual image. Observe that when the object in located in front of the focal point of the converging lens, its image is an upright and enlarged image that is located on the object's side of the lens.
Explanation:
Use the vocabulary in the Word Bank to complete the following explanation.
Answers
4. Draw the ray diagram to show the image formed by a convex lens with focal length5cm when the object is placed 15 cm from the lens. What is the magnification?
Answers
In order to draw the ray diagram, let's draw two rays: one parallel to the lens axis, which will pass through the focus of the lens, and one passing through the center of the lens.
Drawing the ray diagram of this question, we have:
In order to calculate the magnification, first let's calculate the image position:
\(\begin{gathered} \frac{1}{f}=\frac{1}{d_o}+\frac{1}{d_i}\\ \\ \frac{1}{5}=\frac{1}{15}+\frac{1}{d_i}\\ \\ \frac{1}{d_i}=\frac{3}{15}-\frac{1}{15}=\frac{2}{15}=\frac{1}{7.5}\\ \\ d_i=7.5\text{ cm} \end{gathered}\)The magnification is given by:
\(M=-\frac{d_i}{d_o}=-\frac{7.5}{15}=-0.5\)
Select the ways in which you can induce current in a wire. Multiple answers are correct. Select all that apply.
A. Move the wire through a magnetic field.
B. Connect the wire to a voltage source.
C. Coiling the wire around a permanent magnet.
D. Leave the wire out in the sun.
Answers
Answer:
С.Coiling the wire around a permanent magnet.
Which of the following is the minimum amount of work done by a hydraulic lift
to raise a 150-kg aluminum block 2.0 m vertically?
Answers
Answer: 300 J
Explanation:
Force = 150 KJ
Distance = 2.0 m
The minimum amount of work done by a hydraulic lift to raise a 150-kg aluminum block 2.0 meters vertically would be 2940 Joules, as the work done is the product of the force applied to the displacement of the object, therefore the correct answer is option B.
What is work done?The total amount of energy transferred when a force is applied to move an object through some distance
The work done is the multiplication of applied force with displacement.
Work Done = Force × Displacement
As given in the problem we have to find out the minimum amount of work done by a hydraulic lift to raise a 150-kg aluminum block 2.0 meters vertically.
The minimum work done = 150 × 9.8 × 2
= 2940 Joules
Thus, The minimum amount of work done by a hydraulic lift to raise a 150-kg aluminum block 2.0 meters vertically would be 2940 Joules.
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Based on the forces of inertia and momentum, ________ varies according to speed, weight, and the distance between impact and stop.
Answers
The amount of force required to stop an object, based on the forces of inertia and momentum, varies according to speed, weight, and the distance between impact and stop.
Inertia is the tendency of an object to remain in motion unless acted upon by an outside force, while momentum is the product of an object's mass and velocity. The amount of force required to stop an object is proportional to its mass, velocity, and the distance it needs to travel before it comes to a stop. The greater the mass, velocity, and distance, the more force is required to stop the object.
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During 30.0 s, a train was moving with constant speed of 72 km/h. How far away it could relocate within this time?
Answers
Answer:
the distance is 0.6 km
Explanation:
The computation of the distance is shown below:
As we know that
Distance = Speed × time
where
Speed = 72 km/h
And, the time is 30 seconds
So, the distance is
= 72 × 30
= 0.6 km
Hence, the distance is 0.6 km
Migraine and Acupuncture: A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, resea
Answers
Acupuncture can be considered as an effective method to reduce the frequency and severity of migraines.
Migraine is a debilitating condition that can affect a person's quality of life. Acupuncture is a traditional Chinese medical practice that has been used for centuries to treat various ailments, including migraines. Studies have shown that acupuncture can reduce the frequency and severity of migraines. The treatment involves inserting fine needles into specific points on the body to stimulate nerve endings and increase blood flow.
The needles are left in place for about 20-30 minutes, and patients may experience a tingling or dull ache during the procedure. Two key concepts in acupuncture are "qi" and "meridians." Qi is the energy that flows through the body, and meridians are the pathways through which qi flows. By stimulating certain points on the body, acupuncture can help balance the flow of qi and relieve pain. In conclusion, acupuncture can be a safe and effective alternative treatment for migraines.
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