A9 v battery is connected in series to four resistors as follows: r1 = 2 ω, r2 = 4 ω, r3 = 4 ω, and r4 = 8 ω. what is the total resistance of the circuit?
a. 0.5 ω
b. 9 v
c. 18 a
d. 18 ω

6–48 bananas are to be cooled from 24 to 138c at a rate of 215 kg/h by a refrigeration system. the power input to the refrigerator is 1.4 kw. determine the rate of cooling, in kj/ min, and the cop of the refrigerator. the specific heat of banana above freezing is 3.35 kj/kg·8c.