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An insulated, rigid-wall tank contains air at 20 C and 2 bar. A paddle wheel located in the tank does work on the air in the amount 720 kJ over a short time. If the volume of the air in the tank is 2 cubic meters, find the increase in entropy of the air during the process. Assume that the specific heat of the air is constant.
the 2-kg collar is released from rest at A and travels along the smooth vertical guide. determine the speed of the collar when it reaches position B.Also ,find the normal force exerted on the collar at this position.the spring has an unstrectched ..
a u-tube manometer is used to measure the pressure of a vessel under vacuum. assume the manometer is open to
the jeep has a weight of 2510lb and an engine which transmits a power of 100 hp to all the wheels. assuming the wheels
a ball is dropped from a boat so that it strikes the surface of a lake with a speed of 16.5fts. while in the water the
suppose because of random variations introduced during fabrication the links of a chain have a random strength whereby
a steel shaft of radius r75mm is subjected to an axial compression p81kn a twisting moment t15.6kn.m and a bending
determine the theoretical conversion efficiency for a methaneoxygen fuel cell that operates at a temperature of 500
the load is being lifted upward at a constant rate of 9 ms relative to the crane boom ab. at the instant shown the boom
a first class lever in static equilibrium has a 50lb resistance force and a 15lb effort force. the levers effort force is located 4ft from the fulcrum. what is the actual mechanical advantage of the system?
A first class lever, in static equilibrium, has a 50lb resistance force and 15lb effort force. The lever's effort force is located 4 ft from the fulcrum.3. Using static equilibrium calculations, calculate the length from the fulcrum to the resista..
an electronic instrument is to be isolated from a panel that vibrates at frequencies ranging from 25 hz to 35 hz. it is
an open brayton cycle engine operates with a compressor-pressure ratio of 6 an inlet temperature of 20 c and inlet
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