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In a cement mixer, cement, gravel and water are mixed by tumbling in a slowly rotating drum. If the drum spins too fast, the materials stick to the wall instead of mixing. Assume the axis of rotation is horizontal. Calculate the maximum angular speed for which the materials will mix. Express the answer as the number of revolutions per minute. Data: Radius = 0.72 m.
A 0.20 {rm kg} rock is thrown vertically upward from the top of a cliff that is 31.0 {rm m} high. While it hits the ground at the base of the cliff, the rock has the speed of 31 {rm m/s}. Assume that air resistance can be ignored; find the initial sp..
The resistor is connected in series with total set of lightbulbs. What is the value of the resistance? What is the power loss in the resistor.
Express the power in terms of some or all of the variables given in the problem introduction.
An airplane flies due north in a region where Earth's magnetic field has magnitude 5.3×10?5T, declination 0?, and inclination 75?. What's the induced emf between the wingtips, 36 m apart, when the plane flies at 230m/s
What is tension T in each of the cables
A straight wire in a magnetic field experiences a force of 0.030 N when the current in the wire is 2.7 A. What is the new current
Compute the horizontal distance the ball
You've been walking at a steady, and rope pulls up on the sled at a 21 angle. You estimate that the mass of the sled, with your friend on it, is 64 and that you're pulling with a force of 84.0.
A solid circular disk has a mass of 1.2 kg and a radius of 0.12 m. Each of three identical thin rods has a mass of 0.16 kg. Find the moment of inertia of the stool
A spherical balloon has a radius of 7.35m and is filled with helium. Determine the largest mass of cargo the balloon can lift
You take the elevator to the roof of midtown skyscraper that is 100 meters high. What was the velocity of your souvenir just before it hit the ground
When you turn on your key to start your car, electrons migrate from the negative battery terminal through the electric network to the starter motor and back to the positive battery terminal.
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