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A 12-inch cast iron water pipe that has been in service for 50 years is found to have extensive corrosion inside. Inspection of a section of the pipe reveals that the inside diameter is half the original value and the equivalent sand roughness Ks has increased from 0.2 mm to 1 mm. How these conditions would affect friction losses in the pipe describe it.
The wheel of the car has a radius of 0.340 m. The engine of the car applies a torque of 282 N•m to this wheel, that does not slip against the road surface. Since the wheel does not slip, the road must be applying the force of static friction to the w..
A pipe open only at one end has a fundamental frequency of 214 Hz. A second pipe, initially identical to first pipe, is shortened by cutting off the portion of the open end. Now, as both pipes vibrate at their fundamental frequencies, the beat freque..
A pitcher throws a fastball horizontally at a speed of 150 km/h toward home plate, 18.4m away. If the batters combined reaction and swing times total 0.37s, how long can batter watch the ball after it has left the pitcher's hand before swinging? In t..
Find out an effective coefficient of kinetic friction
A stone takes 0.28s to travel past a window 2.2m tall. From what height above top of the window did the stone fall?
A uniform steel beam has a mass of 1640 kg. On it is resting half of an identical beam. What is the vertical support force at each end.
The diodes are oppositely oriented, so that when one diode is forward-biased, the other is back-biased. Which phrase best describes the current in the circuit.
Calculate the centripetal force on the motorcycle.
A star is moving away from the Earth at the speed of 200 km/s. What will be the wavelength of a spectral line that would have the wavelength of 500 nm if the star were at rest.
Calculate change in kinetic energy
A 59.0 kg pole vaulter running at 9.5 m/s vaults over the bar. If the vaulter's horizontal component of velocity over the bar is 1.5 m/s and air resistance is disregarded, how high was the jump.
What pressure is acting on the walls of drum
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