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A stone has a mass of 9.00 x 10 ^-3 kg and is wedged into the tread of an automobile tire. The coefficient of static friction between the stone and each side of the tread channel is 0.70. When the tire surface is rotating at a maximum speed of 14 m/s, the stone flies out of the tread. The magnitude Fn of the normal force that each side of the tread channel exerts on the stone is 1.8 N. Assume that only static friction supplies the centripetal force, and determine the radius r of the tire.
Consider an H-like atom in the quantum mechanical description. How many electrons fit into the n=4 shell of this atom, assuming the states coincide with that of the H-atom?
The rear end of an air conditioner dumps 1.2 * 10^7 J/hr of waste heat into the air outside a building. A fan assists in the removal of this heat. With what temperature does the air emerge
Two solenoids are used to produce a magnetic field across a cathode-ray tube. Find the field at the center of the CRT
q1. assume acceleration is constant during each time interval but not necessarily the same in both intervals what
A 10 g bullet moving 1000 m/s strikes and passes through a 2.0-kg block initially at rest, as shown. The bullet emerges from the block with a speed of 400 m/s. (a) How much energy was lost in the collision? (b) Calculate the average force exerted on ..
Some light bulbs are connected in parallel to a 120 V source, Determine the largest number of bulbs, which can be used in this circuit without burning out the fuse
The wave length associated with the cutoff frequency for silver is 325.0 nm. Find the maximum kinetic energy of the electrons
a 220 kg cylinder falls 2.5m in a joule water heater . as the cylinder falls it stirs the water. how much does the water temp change
An initially stationary hovercraft sits on a large lake. At time t=0 it accelerates due north at a rate of 1.2 m/s2 for 10 s, what is the velocity of the hovercraft at time t=40 s
A string under a tension of 60.0 N is used to whirl a rock in a horizontal circle of radius 2.70 m at a speed of 20.5 m/s on a frictionless surface as shown in the figure below. As the string is pulled in, the speed of the rock increases. When the st..
In the Millikan oil-drop experiment illustrated in the figure below, an atomizer is used to introduce many tiny droplets of oil between two oppositely charged parallel metal plates, Estimate the radius of an oil drop of density 854 kg/m3 for which it..
A grinder consists of a solid 15 kg disk with a diameter of 57 cm. A when active, the disk rotates at a rate of 83 rad/sec. find the rate of angular acceleration of the disk
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