The maximum amount of pulling force a truck can apply when driving on concrete is 8760 N. If the coefficient of static friction between a trailer and
concrete is 0.8, what is the heaviest that the trailer can be and still be pulled
by the truck?
A. 10,950 N
B. 7240 N
C. 12,680 N
D. 8760 N

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

What’s #16 asking and how do i solve it?