Francine is dragging a heavy toolbox across a rough, cement floor. What is a contact force that is acting on the box as Francine pulls it.

A.

static electricity

B.

gravity

C.

magnetism

D.

friction

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Most of the volume of an atom is occupied by the

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates