5. Granite has a specific heat of 800.J/g °C. What mass of granite is needed to store 1.50 x 10 J of heat if the
temperature of the granite is to be increased by 15.5°C?

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.