Acarnot heat engine receives heat from a reservoir at 900°c at a rate of 800 kj/min and rejects the waste heat to the ambient air at 27°c. the entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at -5°c and transfers it to the same ambient air at 27°c. determine (a) the maximum rate of heat removal from the refrigerated space and (b) the total rate of heat rejection to the ambient air.

Afoot bridge is made as a simple deck, 4 m long, with a cross section 2 m (wide) and 20 cm thick, and made of wood. the deck is supported at the two ends. the maximum load allowable on the bridge is 10 tons, provided it is uniformly distributed on the deck. to sense this load, a strain gauge is placed at the center of the bridge and its resistance is monitored. if the sensor has a nominal resistance of 350 s2 and a gauge factor of 3.6, what is the reading of the strain gauge at maximum load? the modulus of elasticity for the wood used in the construction is 10 gpa.