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A 4-ft-long, 1-in.-diameter shaft rotates inside an equally long cylinder that is 1.02 in. in diameter. Calculate the torque required to rotate the inner shaft at 2000 rpm if SAE-30 oil at 70°F fills the gap. Also, calculate the horsepower required. Assume concentric cylinders.
1. In 1998, owing to a mix-up over units, the NASA Mars Climate Orbiter veered off-course and was lost. What was the mix-up? 2. Operating rooms in hospitals typically have a p
In a heating/humidifying system moist air first flows through a heating coil and then through an air washer. The air enters the system at 55 °F dry-bulb temperature and 40 % r
If m = 5, as is typical of creep at the low temperatures used for stress relieving, σ o = 5000 psi, E = 10 × 106 psi, and C = 6 × 10-22(psi)-5/h at the annealing temperature,
A closed, rigid tank is filled with a gas modeled as an idea gas, initially at 27 degrees C and a gage pressure of 300 kPa. The gas is heated, and the gage pressure at the fin
For an upcoming performance of the Tchaikovsky’s The Year1812, you need some very well-timed simulated cannon fire sounds, and decide to use a series of 2-liter soda bottles f
Hollow shaft transmitting power with shear limits. Design a hollow steel shaft to transmit 300 hp at 75 rpm without exceeding a shear tress of 8000 psi. Use 1.2:1 as the rati
Test to determine whether there is a significant difference between mean Value Added by the Manufacturer and the mean Cost of Materials in manufacturing. Use the Manufacturi
Moist air at 45?C and relative humidity 30% (State 1) with another stream of moist air at 20?C and relative humidity 50% (State 2) in an adiabatic duct. Mass flow rate of dry
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