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
7nadin3 [17]
3 years ago
12

Metal sphere A has a charge of − Q . −Q. An identical metal sphere B has a charge of + 2 Q . +2Q. The magnitude of the electric

force on sphere B due to sphere A is F . F. The magnitude of the electric force on sphere A due to sphere B must be:
Physics
1 answer:
Goshia [24]3 years ago
3 0

Complete Question:

Metal sphere A has a charge of − Q . −Q. An identical metal sphere B has a charge of + 2 Q . +2Q. The magnitude of the electric force on sphere B due to sphere A is F . F. The magnitude of the electric force on sphere A due to sphere B must be:

A. 2F

B. F/4

C. F/2

D. F

E. 4F

Answer:

D.

Explanation:

If both spheres can be treated as point charges, they must obey the Coulomb's law, that can be written as follows (in magnitude):

F =\frac{kQ*2Q}{r^{2} }

As it can be seen, this force is proportional to the product of the charges, so it must be the same for both charges.

As this force obeys also the Newton's 3rd Law, we conclude that the magnitude of the electric force on sphere A due to sphere B, must be equal to the the magnitude of the force on the sphere B due to the sphere A, i.e., just F.

You might be interested in
Jack and Jill have made up since the previous HW assignment, and are now playing on a 10 meter seesaw. Jill is sitting on one en
Airida [17]

Answer: 3 m.

Explanation:

Neglecting the mass of the seesaw, in order the seesaw to be balanced, the sum of the torques created by  gravity acting on both children  must be 0.

As we are asked to locate Jack at some distance from the fulcrum, we can take torques regarding the fulcrum, which is located at just in the middle of the length of the seesaw.

If we choose the counterclockwise direction as positive, we can write the torque equation as follows (assuming that Jill sits at the left end of the seesaw):

mJill* 5m -mJack* d = 0

60 kg*5 m -100 kg* d =0

Solving for d:

d = 3 m.

6 0
3 years ago
Convert 100 millimeters to meters
drek231 [11]

100 millimeters equals 0.1 meters.

3 0
3 years ago
Natural history research involves ____ unobsevable and unrepeatable past events.
Tanzania [10]
B verifying is the answer
4 0
3 years ago
Which examples are simple machines?
frozen [14]
A hammer and a pulley
4 0
3 years ago
The gauge pressure in the tires of your car is 210 kPa (30.5 psi) when the temperature is 25°C (77 °F). Several days later it is
DaniilM [7]

Under the assumption that the tires do not change in volume, apply Gay-Lussac's law:

P/T = const.

P = pressure, T = temperature, the quotient of P/T must stay constant.

Initial P and T values:

P = 210kPa + 101.325kPa

P = 311.325kPa (add 101.325 to change gauge pressure to absolute pressure)

T = 25°C = 298.15K

Final P and T values:

P = ?, T = 0°C = 273.15K

Set the initial and final P/T values equal to each other and solve for the final P:

311.325/298.15 = P/273.15

P = 285.220kPa

Subtract 101.325kPa to find the final gauge pressure:

285.220kPa - 101.325kPa = 183.895271kPa

The final gauge pressure is 184kPa or 26.7psi.

8 0
3 years ago
Other questions:
  • Two long conducting cylindrical shells are coaxial and have radii of 20 mm and 80 mm. The electric potential of the inner conduc
    6·1 answer
  • Visible light travels at a speed 3.0 × 108 of m/s. If red light has a wavelength of 6.5 × 10–7 m, what the frequency of this lig
    11·2 answers
  • Express 4,560 m in Km
    5·2 answers
  • If you add 1 proton to Carbon, it will no longer be Carbon, it will be ________________.
    14·1 answer
  • Different ____ of light through two separate mediums causes the bending of waves fronts associated with light rays.
    10·1 answer
  • Describe what happens to water waves when they strike a flat surface?
    13·1 answer
  • Suppose that there are N=108 two-state systems, each with energy difference E=6 × 10-21 J between the two states. The environmen
    12·1 answer
  • A block slides down a frictionless plane having an inclination of 15.0°. The block starts from rest at the top, and the length o
    14·1 answer
  • What does saliva begin to break down in the mouth?<br> answers QUICK I will make you brainst !
    10·2 answers
  • How do Glaciers (located thousands of miles away) affect Florida's geography?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!