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A potter's wheel is rotating around a vertical axis through its center at a frequency of 2.0rev/s . The wheel can be considered a uniform disk of mass 4.9kg and diameter 0.36m . The potter then throws a 2.9-kg chunk of clay, approximately shaped as a flat disk of radius 7.0cm , onto the center of the rotating wheel.
What is the frequency of the wheel after the clay sticks to it? Ignore friction.
A grade school student plans to build a 38-power telescope as a science fair project. What focal length is needed for her objective
A hanging block A ( Ma = 15 kg) is connected by a light cable and a pulley wheel to a second block B ( Mb = 10 kg) situated at the bottom of a frictionless inclined plane with angle %u03B8 = 30o to the horizontal
The amplitude of an electric field is 0.4 v/m 23 km from a radio transmitter. What is the total power emitted by the transmitter
A 7,800-kg truck runs into the rear of a 1,000-kg car that was stationary. The truck and car are locked together after the collision and move with speed 2 m/s
A spring with a force constant of 130 is attached to the backpack and pulled horizontally, as indicated in the figure .If the backpack begins to slide when the spring ( = 130 ) stretches by 2.40, illustrate what is the coefficient of static fric..
During a violent storm, a car is struck by a failing high-voltage wire that puts an excess charge of -850 mircoC on the metal car. how much is on the outer surface of the car
A wooden raft has a mass of 69 kg. When empty it floats in water (density 1000 kg/m3) with 25% of its volume submerged. What mass of sand can be put on the raft
A projectile is fired horizontally from a gun that is 47.0 m above flat ground; emerging from the gun with a speed of 250 m/s.
Copper has an electrical resistivity %u03C1 = 1.72 x 10-8 %u03A9m. What is the electrical resistance of a copper wire with a radius of 1.0 mm and a length of 25 m
A highly charged piece of metal (with uniform potential throughout) tends to spark at places where the radius of curvature is small, For that amount of charge, what is the potential of the sphere relative to infinity
A man driving a car toward a large vertical wall sounds his horn. The car is traveling at 81 km/h. What is the frequency of the cars horn
Describe how to find moment of inertia. Provide equations allowing to find moment of inertia of a solid cylinder and of a cylindrical ring. State Newton's Second Law for rotational motion
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