$6-47$E A heat pump with a COP of $2\mathrm{.}5$ supplies energy to a house at a rate of $60,000Bt\frac{u}{h}.$ Determine $($a$)$ the electric power drawn by the heat pump and $($b$)$ the rate of heat absorption from the outside air. Answers: $($a$)9\mathrm{.}43$ hp $,($b$)36,000$ Btu$/$h