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A long, solid cylinder of radius 2 ft hinged at point A is used as an automatic gate, as shown in Fig. P3-61E. When the water level reaches 15 ft, the cylindrical gate opens by turning about the hinge at point A. Determine
(a) the hydrostatic force acting on the cylinder and its line of action when the gate opens and
(b) the weight of the cylinder per ft length of the cylinder.
A company is trying to decide which machine to purchase based on the following information. If they all have 15 years useful life and MARR is 10%, use incremental rate of return analysis in Excel to decide which one is the best choice. Don't forge..
consider the following pulse width modulation rc circuit. the circuit consists of a switch two resistors and a
1 steam at 3 mpa and 400 c enters an adiabatic nozzle steadily with a velocity of 40 ms and leaves at 2.5 mpa and 300
Determine the rated value of the power coefficient CP and compare this with the value at the Betz limit. Assume the air density ρ = 1.2 kg/m3
a 4 kw motor is driving an oil pump with an efficiency of 95 down a 10 mm diameter pipe. if the velocities of the fluid
Water is the working fluid in a regenerative Rankine cycle with one closed feedwater heater. Steam enters the turbine at 1400 lbf/in.2 and 10008F and expands to 120 lbf/ in.2, where some of the steam is extracted and diverted to the closed feedwat..
consider a rankine cycle 100 mw net power vapor power plant with a reheater and regeneration and a single open
A machine tool company has a production machine with a trade in value of $10,200. The company will not keep the machine more than 3 more years. The costs associated with the machine are shown in the table below
Electrical energy can be converted to heat energy with an efficiency of 100%, by sending a current through a resistor and using "Joule heating": P = I2 R. Explain how this doesn't violate the 2nd Law, which told us that the efficiency of an engine ..
air as an ideal gas with cp 0.241 btulbr is compressed from a state where the pressure is 3 atm and the temperature is
a heat engine operates between two reservoirs at 850c and 20c. one -half of the work output of the heat engine is used
The spool has a mass of 50 kg and a radius of gyration of kO = 0.280 m. If the 20-kg block A is released from rest, determine the distance the block must fall in order for the spool to have an angular velocity v = 5 rad>s. Also, what is the tension i..
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