If a rock weighing 2,200 n is dropped from a height of 15 m, what is its ke just before it hits the ground? remember, weight is measured in newtons (n), and is equal to mass times gravity. a. 0 j b. 2,224 j c. 147 j d. 33,000 j

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.