Determine the period and frequency in SI units, for the following: a.) A human eye blinks 12 times in 48 s
b.) A compact disc rotate at a rate of 210 revolutions per minute

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.

Energy is the ability to do work which measures what

How much force was applied to an object if was moved 2 meters and the work done on the object was 8 joules? a. 0.25 n b. 4 n c. 6 n d. 16 n