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A refrigerator in a kitchen at 20 degrees celcius uses R-134a. The freezer is to be kept at -5 degrees celcius or cooler. What is the maximum pressure that can be used in the evaporator? Why?
Determine the mass flow rate of the air passing through this engine and the rates of heat addition and rejection when this engine produces 1000 hp. Assume constant specific heats at room temperature.
a vehicle is moving along a straight line with an acceleration given by ms2 where s is in m. at s 0 t 0 and v 6 ms.
determine the time needed for the velocity to become v=vf. initially the particles falls from rest.
if silcion is cooled quickly it will form glass instead of crystallyzingone way to do this is to deposit si atoms onto
an expander receives 1 lbms air at 300 psia 540 r with an exit state of 60 psia 540 r. assume the process is reversible
a four foot diameter reel of wire pays out 250 feet of conductor wire in two minutes. what is the average angular
determine the average applied force exerted on to the pile hammer. Note because the force is applied over a short time period it can be considered as an impulse force.
a pump fitted with 50mm bore ball bearings uses an oil whose viscosity ranges from 100cst at cold pump start-up to
a viscous fluid flows past a flat plate such that the boundary layer thickness of a distance d from the leading edge is
a skydiver jumps from a ballon and falls freely for 6 seconds. her parachute then opens decelerating her at a constant
silica sio2 is formed on silicon as an electrically insulating layer for microelectronic devices. silica is formed when
low-velocity steam with negligible kinetic energy enters an adiabatic nozzle at 300 c and 3 mpa. the steam leaves the
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