Determine if this main can serve water to neighborhoods
The water pressure in the mains of a city at a particular location is 350kPa gage. Determine if this main can serve water to neighborhoods that are 50m above this location.
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A differential thermocouple with sensors at the inlet and exit of a pump indicates that the temperature of water rises 0.072 degrees F as it flows through the pump at a rate of 1.5 ft^3/s.
At what pressure in the test section must the tunnel operate to have the same Mach and Reynold's numbers? The speed of sound in the air at 25 degrees C is 345 m/s.
Oxygen gas enters a well-insulated diffuser at 30lbf/in^2, 440degree Rankine, with a velocity of 950 ft/s through a flow area of 2.0in^2. At the exit, the flow area is 15 times the inlet area, and the velocity is 25 ft/s.
A large flywheel weighs 3000 kg and has a radius of gyration of 1 m. It is observed that 10 min is required for the flywheel to coast to rest from an angular velocity of 300 rad/s.
An inventor claims to have devised a power cycle exploiting this situation that has a thermal efficiency of 14%. Evaluate this claim.
If the pipe is placed in a 50 mi/hr crosswind (wind direction perpendicular to the axis of the cylinder), calculate the Reynolds number for the flow of air over the outside of the cylinder (using properties of air)
A woman can read the newspaper if it is held no closer than 57.2 cm from teh eye. What should the focal length of a lens be if she wants to read at a more comfortable distnace of 23.8 cm
The resonant speed is determined experimentally to be 1200 rpm and the corresponding amplitute of the main mass of the machine is 12.7 mm. Determine the amplitude for a speed of 2400 rpm.
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