[填空题]
(a) What is the coefficient of performance of avn.)x0t/m:bg/faz66hj nnp + cb qq y.n ideal heat pump that exynq(wksl2h*;4z /n(o htts e:tracts heo/s t hwsz;tleh4 (k*(qy :n2nat from 6$^{\circ}\,C$ air outside and deposits heat inside your house at 24$^{\circ}\,C$?
(b) If this heat pump operates on 1200 W of electrical power, what is the maximum heat it can deliver into your house each hour? $ \times10^{ 7}J$
