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A 10 g steel marble is spun so that it rolls at 150 rpm around the inside of a vertically oriented steel tube. The tube is 12 cm in diameter. Assuming that the rolling resistance is negligible enough for the marble to maintain 150 rpm for several seconds. During this time, will the marble spin in a horizontal circle, at constant height, or will it spiral down inside the tube? Prove your answer. Take coefficient of static friciton to be 0.8.
Due to its spin, the electron possesses a magnetic moment ?B. Treating the conduction electrons in a metal as a free electron gas, Evaluate this expression at zero temperature
A 100kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30 below the horizontal. The coefficient of kinetic friction is 0.20. What must be the magnitude of P, so that the net work completed by it and the kinetic..
a magnetic field increases from 0 to 0.30t in 1.5 seconds. how many turns of wire are needed in a circular coil 15cm in
A beaker of mass 325 g is sitting on a table. The beaker is filled with 210 g of water. The beaker and water are initially in thermal equilibrium at 22 ?C, What is the specific heat of the beaker
A -50 nC charged particle is in a uniform electric field {E} = (10 V/m, east). An external force moves the particle 1.0 m north, then 6.0 m east, How much work is done on it by the external force
Standing at the edge of a cliff 33.5 m high, you drop a ball. Later, you throw a second ball downward with an initial speed of 12.7 m/s. What is the increase in speed of the second ball
A 5.0 µC point charge is placed in an external uniform electric field of 1.60 104 N/C. At what distance from the charge is the net electric field zero
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of -2q. Sphere B carries a charge of +5q. Sphere C carries no net charge. Spheres A and B are touched together and then separated. Sphere C is then touched to sphere A and..
A particular race car can cover a quarter mile track (402 m) in 6.20 s starting from a standstill. what horizontal force must the road exert on the tires
when you lift an inverted glass from a basin of water the glass remains filled with water with the water in the glass
a charge q is distributed uniformly around a thin ring of radius r. the ring is rotating about an axis through its
An automobile travels on a straight road for 40.0 km [E] at 30.0 (km/h). It then continues in the same direction for another 40.0 km [E] at 60 (km/h). Estimate the average speed, distance, displacement, & average velocity for the trip.
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