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A solid disk rotates in the horizontal plane at an angular velocity of 0.077 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.14 kg·m2. From above, sand is dropped straight down onto this rotating disk, so that a thin uniform ring of sand is formed at a distance 0.36 m from the axis. The sand in the ring has a mass of 0.31 kg. After all the sand is in place, what is the angular velocity of the disk?
The system is released from rest, and the string moves without slipping over pulley. If the larger mass is traveling at a velocity of 2.25 m/s when it has dropped 1m, how much mechanical energy was lost due to friction in the pulley's axle.
Suppose the highway is icy and the coefficient of friction between the tires and pavement is only one-third what you find in part (a). Illustrate what should be the maximum speed of the car so it can round the curve safely?
If two tiny identical spheres attract each other with a force of 4.00nN when they are 28.0cm apart, what is the mass of each sphere
If both the ring and the rod are warmed together, what temperature must they both reach so that the ring barely slips over the rod.
A sinusoidal electromagnetic wave from a radio station passes perpendicularly through an open window that has area of 0.600m^2. How much energy does this wave carry through the window
2 mol of He gas initially at STP are sealed in a cylinder with a movable piston. Heat is extracted from the gas until it reaches a temperature of 100 K. What is the thermal efficiency of this engine
Two ropes are pulling upward on a large crate. The weight of the crate is 350. N. The tension in the left rope is the same as the tension in the right rope. what is the tension in the left rope
A 1000 kg aircraft going 25 m/s collides with a 1500 kg aircraft that is parked. how far did they skid
What is the magnitude of the magnetic forces on each of three sides?
You observe that a solid cube of some material floats on the surface of an oil puddle at a service station with 68.5% of its volume submerged
A ball thrown upward returns to the same level after 4s in the air. How long would that ball take to reach the same level
At time t=0 a grinding wheel has an angular velocity of 27.0rad/s, At what time does the wheel stop
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