Arock is dropped from the top of a building. as it falls, it is getting faster and faster. which of the following is true about the rocks kinetic energy?

a.) it's kinetic energy remains constant
b.) it's kinetic energy is zero
c.) it's kinetic energy is increasing
(or decreasing)

Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.