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A grinding wheel (r=7.6) is rotating at 1750 rpm.
a) what is the speed of a point on the outer edge of the wheel?
b) what is the centripetal acceleration of the point? please explain and show work
Suppose the current suddenly increases to 1.55 A in the same direction as before, due to an increase in speed of the bar. Find the emf induced in the rod
A child slides down a snow-covered slope on a sled. At the top of the hill, her mother gives her a push at a speed of 0.9 m/s to obtain her started. The frictional force acting on the sled is one-fifth of the combined weight of the child and the sled..
A 38.0-cm-focal-length converging lens is 27.0 cm behind a diverging lens. Parallel light strikes the diverging lens. After passing through the converging lens, the light is again parallel. What is the focal length of the diverging lens?
7400 J of input heat to perform a certain amount of work. Engine 2 has an efficiency of 0.33, How much input heat does the second engine require
An aquarium of length L, width (front to back) W, and depth D is filled to the top with liquid of density, Evaluate the forces on the front window for a 95-cm-long, 25-cm-wide, and 40-cm-deep aquarium filled with water
The figure shows four long horizontal layers of different materials, with air above and below the stack. The index of refraction is given for each layer. With the incoming light rays as shown, in which layer is there a possibility of totally trapp..
100 kg of water is raised to a height of 50m.the water is used to produce electricity.the electricity produced can run three 100w lamps for 1 hour. what is the efficiency?
You are a passenger (m = 108 kg) in an airplane that is accelerating on the runway, beginning to take off. The force between your back and your seat is 405 N. how far does the plane travel as it accelerates to a takeoff speed of 125 m/s
a 150 N sled is pulled up a 28 degree slope at a constant speed by a force of 100 N. What is the coefficient of kinetic friction between sled and slope
two equally charged particles are held 3.1 x 10-3 m apart and then released from rest. the initial acceleration of the
Two 1.5cm -diameter disks face each other, 2.0mm apar, What launch speed must the proton have to just barely reach the positive disk
A wall is composed of two materials, material 1 has a thickness of 3.68 cm and a thermal conductivity of 0.1 J/msCo while material two has a thickness of 6.02 cm, what is the energy loss per second to the nearest watt
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