Physics

Problem

A heat pump keeps a room at

293\,\text{K}

by delivering

2.0\times10^{7}\,\text{J}

of heat to the room every hour. The outdoor temperature is

273\,\text{K}

. If the device operates at

40\%

of the maximum possible COP for these temperatures, the electrical power input required is closest to a)

0.63\,\text{kW}

3.4\,\text{kW}

0.95\,\text{kW}

1.4\,\text{kW}