A circuit has a voltage drop of 12 V across a 30 2 resistor that carries a current of 0.8 A. How much power is used by the resistor? Use P = VI.
A. 360 W
B. 12W
C. 9.6 W
D. 24 W

This question is worth 54 points ! rock falls from a ledge to the ground what energy conversion occurs during this process a potential to kinetic b kinetic to potential c thermal to mechanical d chemical to mechanical

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

If the wavelength is tripled, while the speed of the wave is held constant, what happens to the frequency? a. decreases to 1/3 b. decreases to 1/9 c. increases by 3 d. increases by 9 e. stays the same