1. Luis is studying motion. He is using two balls-Ball
1 and Ball 2. The picture shows the equipment he
is using. To shoot each ball, Luis pulls back on the
stick (5), which compresses the spring (4). When
he releases the stick, the ball shoots forward.
Suppose Ball 1 and Ball 2 are shot from the table
with the same force. How does the potential and
kinetic energy of Ball 1 compare to that of Ball 2?

An electric clothes dryer has a resistance of 8 ohms. it draws 30 a of current. what is the voltage, in volts, of the wall outlet that it is plugged into?

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.