21. In the geologic past, abiotic factors such as volcanic eruptions have had an impact on the availability of resources. Volcanic eruptions impact the availability of which resource?
A. carbon dioxide
COre
B. minerals
C. sunlight
D.
water
ung
MOT

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.