When two point charges are 2.0 cm apart, each one experiences a 1.0-n electric force due to the
other charge. if they are moved to a new separation of 8.0 cm, the electric force on each of them
is closest to

a) 1.0 n.
b) 4.0 n.
c) 16 n.
d) 0.25 n.
e) 0.063 n.

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

What is the measure of a change in an objects velocity?