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a heat pump operates at steady state maintains a house at 22 0c when the outside is -22 0c using 15 kw of power the
a rigid insulated tank contains 06 kg of air initially at 200 kpa 20 c the air is stirred by a paddle wheel until its
1 a 12 foot a-36 steel column has an outer diameter of 30 in and a thickness of 025 in determine the critical load if
one cubic meter of argon initially at 300 k is compressed such that the change in the specific enthalpy is -027 kjkg-k
an air-conditioning system operating on the reversed carnot cycle is required to transfer heat from a house at a rate
due to global climate change scientist predict the earthrsquos atmospheric temperature will increase as much as 8degf
a concentric tube ie tube-in-tube heat exchanger uses water at 15 degc to cool ethylene glycol from 100 degc to 60 degc
a 120cm x 80cm plate is rolled into a 120cm long cylindrical shell using a 2cm overlap joint to create the cylinder the
find the torque required to produce a maximum shearing stress of 16500 psi in a solid circular steel shaft with a
what is the difference between a sensor less esc and sensored esc which ones can be programmed auto messily and or by
a spring on a rod hangs from the ceiling and has a 100kg collar attached to the other end also riding on the rod the
a disc with radius r rotates at an angular speed of omega near a surface that is fixed the space between the disc and
air in a piston-cylinder is compressed from 100kpa 25 degrees celsius to 650kpa 200 degrees celsius using the ideal gas
a copper ball with a diameter of 2 cm is removed from an oven at a uniform temperature of 200degc upon removal from the
the element of an electrical heating device is a cylinder with a diameter of 12 mm and a length of 20 cm the electrical
air at -5degc flows over the wall of a building with a velocity of 10 ms the length of the wall in the direction of air
in a cold winter day wind blows over the wall of a house at 40 kmh the outside air temperature is reported to be -7degc
a tension member made of 2014-t651 aluminium has a dimensions of b 30 and t4mm a safety factor of 30 against failure by
under what circumstances three-way control valves would be used rather than two-way control valves despite the higher
the pressure and temperature at the beginning of compression in a diesel cycle are 100 kpa and 300 k respectively at
a simple ideal brayton cycle has a pressure ratio of 6 the working fluid enters the compressor at a pressure of 100 kpa
an air-standard otto cycle has a compression ratio of 6 at the beginning of compression the pressure is 100 kpa and the
oil at 80degf density r 568 lbmft3 and viscosity m 00278lbmfts is flowing steadily in a 05in diameter 120ft long pipe
show that the specific heat at saturation of a liquid phase of mass m defined by cf deltaqmdt is generally not the same