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A car engine produces 136 hp on the output shaft with a thermal efficiency of 30%. The fuel it burns gives 35,000 kJ/kg as energy release. Find the total rate of energy rejected to the ambient and the rate of fuel consumption in kg/s.
The elevator E has a mass of 500kg, and the counterweight at A has a mass of 150Kg. if the motor supplies a constant force of 5KN on the cable at B, determine the speed of elevator when t= 3s, starting from rest neglect the mass of pulleys and cab..
2.5 kg of h2o is contained in a piston-cylinder assembly initially at a pressure of 1.5 bar and a volume of 1.5m3. the
the birthday problem the birthday problem is stated as follows if there is a group of n people in a room what is the
using a lumped parameter analysis find the heat transfer coefficient across the gills of a fish. assume the process is
a wire of radius r length l and initial temperature ti is cooled by a fluid of temperature tf at time t0. the heat
a piston d50mm sits on top of a fluid s.g.11 connected to a 10mm diameter tube open to the atmosphere. a if the fluid
a piston-and-cylinder device contains 10 kmol of n-pentane at -35.5 c and 100 bar. slowly the piston is moved until the
1 initially an insulated rigid tank contains 2.85 kg of water at 263oc and 1 mpa. a heater in the wall of the tank
Determine the natural frequencies of the system. For the baseline system I get natural frequencies at the following engine speeds: 435, 2026, 2818, 5225, 7093, 10245, and 12153 rpm.
air at 80 degrees fahrenheit and 80 percent relative humidity is cooled to 51 degrees fahrenheit at a constant pressure
a heat pump uses r-134a as the working fluid and operates on an ideal vapor-compression cycle. the condenser pressure
in a planned experiment a thermocouple is to be exposed to a step change in temperature. the response characteristics
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