The force of gravity between two students is 3.5E-8 Newtons. If the first students mass is 73.5 kg and the second students mass is
79.9 kg, how far apart must the students be from each other?

An uncharged nonconductive hollow sphere of radius 18.0 cm surrounds a 12.0 µc charge located at the origin of a cartesian coordinate system. a drill with a radius of 1.00 mm is aligned along the z axis, and a hole is drilled in the sphere. calculate the electric flux through the hole.

What is the fate of the electrons that interact with a specimen in an electron microscope?

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?