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The hydraulic turbines in a water-power plant rotate at 60rpm and are rated at 20, 000 hp. The 30 in-diameter shaft between the turbine and the generator is made of steel (G = 12, 000 ksi) and is 20 ft long. Determine (a) The maximum shearing stress in the shaft at the rated load. (b) The magnitude of the angle of twist in the shaft at the rated load.
A 5 kg ball hangs from the ceiling by a thread. The walls of the room are 5 m apart and they are made of metal, What is the charge on the ball
In Figure (a), two circular loops with different currents but the same radius of 10. cm, are centered on a y axis. They are initially separated by distance L = 7.5 cm, with loop 2 positioned at the origin of the axis
A uniform narrow tube 1.79 long is open at both ends. It resonates at two successive harmonics of frequencies 285 and 342. What is the speed of sound in the gas in the tube
A small bag of sand is suspended by a string of length L=1.2m. A bullet of mass m=8g, moving with initial speed vi = 600m/s in the horizontal direction, Determine the mass of the sand bag
A horizontal vinyl record of radius 0.11 m rotates about a vertical axis through its center with an angular speed of 4.7 rad/s. What is the angular speed of the record immediately after the putty sticks to it
A pulsed proton beam is fireat a target each last 45.0ns and there 3.00 X 10^9 protons in each pulse, What is the average pressure on the beam spot during the pulse if the protons are absorbed by the target
Consider two (very) long, cylindrical rods, both of radius R. Rod A has a cylindrically symmetric, positive, Find that electric field E(r) as well
A 1.10 kg mass is at the center of a uniform spherical shell of mass 1.09 1020 kg and radius 1.05 106 m. Find the resultant gravitational force on the mass
In Chapter 10 in the textbook, we saw that the Achilles tendon will stretch and then rebound, storing and returning energy during a step. What is the spring constant of her Achilles tendon
A wooden raft has a mass of 59 kg. When empty it floats in water (density 1000 kg/m3) with 59 percent of its volume submerged. What mass of sand can be put on raft without it sinking.
A space probe in deep space is moving along the x-axis at a speed of v0 when it is hit by a meteor. What is the final direction and speed (in terms of v0) of the probe
A railroad car of mass M= 2000kg and speed(initial velocity) Vo= 8.50 m/s collides and couples to another car of equal mass and initially at rest, What is the final speed of the two coupled railroad cars
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