100 J of gravitational potential energy is stored in an object, which is dropped. How much kinetic energy will the object have just before it hits the ground? you many ignore air resistance and friction.

a) 200 J
b) 100 J
c) 50 J
d) 0 J

An observer that stands still as the electron moves by him, will observe

Adielectric-filled parallel-plate capacitor has plate area a = 30.0 cm2 , plate separation d = 9.00 mm and dielectric constant k = 3.00. the capacitor is connected to a battery that creates a constant voltage v = 15.0 v . throughout the problem, use ϵ0 = 8.85x10-12 c2/n.m2 . find the energy u1 of the dielectric-filled capacitor.

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