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A mass of 15 kg of air in a piston-cylinder device is heated from 25 to 77 degrees celcius by passing current through a resistance heater inside the cylinder. The pressure inside the cylinder is held constant at 300 kPa during the process, and a heat loss of 60 kJ occurs. Determine the electric energy supplied, in kWh.
a motorist traveling along a straight portion of a highway is decreasing the speed of his automobile at a constant rate
the lowest temperature that has been achieved is about 1 times 10-6 k. to achieve this an additional stage of cooling
1. a discrete 120 v ac output module is to be used to control a 230 v dc solenoid valve. draw a diagram showing how
a tank is filled with 8 gallon of brine in which 2 lb of salt is dissolved. brine having 3 lb of salt per gallon enters
two barges each with a displacement mass of 550 mg are loosely moored in calm water. a stunt driver starts his 1650-kg
on a cold winters day it is 30degf outside. yet the temperature of the outside surface of the mechanical engineering
the outdoor air temperature is 6 degrees c while a building maintains the inside temperature at 22 degrees c and loses
consider the 0.3 kg of n2 in a rigid container at 400 k and 5 atm. the n2 is cooled to 300 k. determine the specific
a light truck weighs 3100 lb and is rated at 30 miles per gallon for a 60 mph highway driving on level ground. how much
a fully loaded boeing 777-200 jet transport aircraft weighs 325000 kg. the pilot brings the 2 engines to full takeoff
water steam at 3mpa and 400oc is expanded to 100kpa in an adiabatic turbine with an isentropic efficiency of 92.
determine in a steady state heat transfer through a 2.4in thick homogenous trapezodial flap with its faces maintained
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