The tow truck weighs 7.83 kN. The wheel base (distance between the front wheel and the back wheel) is 6.3 m and the center of gravity of the truck is 2.15 m behind the front wheel. The load hangs from the tow truck 0.9 m behind the back wheel. Required:
How big can L be before the truck tips over?

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.