A parallel plate capacitor is connected to a battery . The space between the plates is then filled with a dielectric material that has k= 1.3 while the capacitor remains connected to the battery. Find the ratio of the stored energy in the capacitor U_after /U_before.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;

it is b. absorbs thermal energy