1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
torisob [31]
4 years ago
5

How many electrons must be removed from each of two 4.85-kg copper spheres to make the electric force of repulsion between them

equal in magnitude to the gravitational attraction between them?
Physics
1 answer:
VladimirAG [237]4 years ago
3 0

Answer:

n=2.611*10^{9}electrons

Explanation:

Given data

mass of copper m=4.85 kg

charge of electron qe= -1.6×10⁻¹⁹C

To find

Number of electron n must be removed

Solution

Equate the magnitude of electric force Fe of repulsion between two two spheres to the magnitude of gravitational force of attraction between them

So

F_{e}=F_{g}\\ k\frac{q_{e}q_{e}}{r^{2} }=G\frac{m^{2} }{r^{2} }\\  k(q_{e})^{2}=Gm^{2}\\

where q is charge of each sphere which is equal to number n of removed electrons multiplied by each charge qe

So

k(nq_{e})^{2}=Gm^{2}\\n=\sqrt{\frac{Gm^{2}}{k(q_{e})^{2}} }\\ n=\sqrt{\frac{(6.67*10^{-11}N.m^{2}/kg^{2})(4.85kg)^{2}}{(8.99*10^{9}N.m^{2}/C^{2}  )(1.6*10^{-16}C)^{2}} }\\n=2.611*10^{9}electrons

You might be interested in
When vibrational motion in an object increases, which is a true statement?
zubka84 [21]
A -..................................is the correct option
6 0
3 years ago
Read 2 more answers
Can the big bang's sound still be heard?
AleksandrR [38]
There is no sound in space because there is no medium to move it. However i think the big bang can still been seen in the form of background radiation but i am unsure. 
4 0
3 years ago
CClassify each characteristic of sound waves.
Alex787 [66]

Explanation : Explain each characteristic of sound waves.

Intensity : the intensity of the sound wave is understand as the power carry by sound wave per unit area in the direction perpendicular to that area.

Loudness :  loudness is the quality of the loud and soft of the sound wave.

Frequency : Human normal hear sound frequency between 20 Hz to kHz.

Pitch : Pitch is the quality of low and high of sound wave . pitch relates to the frequency of the slowest vibration in the sound wave for simple sound.

4 0
3 years ago
Read 2 more answers
Where are bar magnets the strongest?
Alecsey [184]

Answer:

The magnetic field is strongest at the center and weakest between the two poles just outside the bar magnet. The magnetic field lines are densest at the center and least dense between the two poles just outside the bar magnet.

Explanation:

3 0
2 years ago
Read 2 more answers
A dragster starts with zero velocity and completes a 404.5 m (0.2528 mile) run in 4.922 s. If the car had a constant acceleratio
KIM [24]

Answer:

a. a=33.34ms⁻², V=164.4m/s

Explanation:

Since the dragster started with zero velocity, de determine the acceleration using of the equations of motion.

Below are the data given

Distance, s=404.5m,

time taken,t=4.922secs

Using the equation

S=ut+1/2at²

where u is the initial velocity and u=0

Making the acceleration the subject of the formula, we arrive at

a=2s/t²

a=(2*404.5)/4.922²

a=33.34ms⁻².

To determine the velocity, we use

V=u+at

V=0+33.34ms⁻² *4.922sec

V=164.4m/s

5 0
3 years ago
Read 2 more answers
Other questions:
  • Ball of mass 200g is moving with a speed of 17m/s. What is its deBroglie wavelength?
    12·2 answers
  • If the forces acting on an object are balanced, the object may change speed, change direction, or do both. true or false please
    7·1 answer
  • For Samuel Kenobi <br><br> random words so I can get it to 20 characters ok
    6·1 answer
  • What is the total resistance for the circuit? (must include unit - ohms)
    10·1 answer
  • certification programs are available at all of the following except A. online schools B. vocational school C. community colleges
    8·2 answers
  • The cars salemens tells you that the car can go from a stopped position to 60 miles per hour in 6 seconds he is giving you the c
    14·1 answer
  • Assume that charge −q is placed on the top plate, and +q is placed on the bottom plate. What is the magnitude of the electric fi
    12·1 answer
  • It's always safer to exercise in a gym.
    14·2 answers
  • What is charging by conduction. <br> Can you also give an real life example of it.
    8·2 answers
  • Use the following table of a school bus during morning pickups to calculate its average speed between 0h and 2.34h.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!