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A heat pump with a COP of 3.0 is used to heat air contained in a 1205.4m^3 of well-insulated, rigid tank. Initially the pressure and the temperature inside the gas tank are 100 kPa and 7 degrees Celsius, respectively. When running, the heat pump consumes 5kW of electric power. How long does it take for the heat pump to raise the temperature of air in the tank to 22 degrees Celsius?
on may 23 1998 a tanker truck loaded with gasoline p719.7 kgm3 jumped a jersey barrier and collided with an oncoming
Design life is 9630 hours, rotating at 250 rpm, load of 880 lbs, what is the basic design load rating (assuming no axial loads)?
the flow rate of air ar standard conditions in a flat duct is to be determined by installing pressure taps across a
a mixture of methanol and water is to be separated in a flash drum operating at a pressure of 1atm. the feed rate is 25
r-134a is flowed into an insulated 0.2m3 initially container from a line at 500kpa saturated vapor until the flow stops
If the minimum attractive rate of return is20% per year, determine the one machine that should be selected on the basis of a rate of return analysis.
the boss asked you to size a dehumidifier to dehumidify 100lbm per hr of air. the desiggn calls for air entering the
nerve impulses travel at different speeds depending on the type of fiber through which they move. the impulses for
a rankine cycle steam plant operates between the pressures of 15 mpa and 6 kpa. steam exiting the boiler is 550 degrees
water is used in a regenerative power cycle where the standard rankine cycle is augmented with one closed feed water
if a rectangular box with water accelerates to the right that has the dimensions ofleft side height 40cmlength
if a vsdmotor combination has a torque of 100 n.m at the rated speed and full power what is the maximum torque it can
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