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A potter's wheel having a radius 0.53 m and a moment of inertia of 14.9 kg · m2 is rotating freely at 46 rev/min. The potter can stop the wheel in 4.0 s by pressing a wet rag against the rim and exerting a radially inward force of 72 N. Find the effective coefficient of kinetic friction between the wheel and the wet rag.
A camera has a telephoto lens of 260-mm focal length. The lens can be moved in and out a distance of 18.5 mm from the film plane by rotating the lens barrel. what is the closest object distance that can be focused
A spaceship traveling at speed .5c towards earth ejects a spacepod traveling in the forward direction at speed .25c relative to the spaceship, what is the speed of the light signal relative to the earth in terms of c
child whose mass is 30 kg sits on a merry-go-round at a distance of 2 m from the center. What is the magnitude of the net force (in Newton) acting on the child?
A certain loudspeaker has a diameter of 45 cm. At what frequency would the wavelength of sound it emits in air be equal to its diameter.
A 33.0 g bullet moving at 434 m/s strikes a 5.0 kg bag of flour that is on ice, at rest. The bullet passes through the bag, leaving at 295 m/s. How fast is the bag moving while the bullet exits.
question1a diver 60 m deep in 10 celcius fresh water exhales a 0.5-cm-diameter bubble.what is bubbles diameter just as
A four-turn rectangular coil has a spatially varying magnetic field directed through its center as shown. The magnetic field is given by [(B)\vec] = 4.2 y2 t [^(k)], Find the direction of the induced current in the coil
Determine the maximum energy lost in the collision.
An airplane, capable of flying at a speed of 500 miles/hr in still air (i.e., the airplane can fly with a speed of 500 miles/he relative to the air), How long does it take the plane to fly over the river
federal statute requires that a car's bumper be designed to withstand a 2.50 mph (1.12m/s) collision with an immovable object without damage to the body of the car. Calculate the average force on a bumper
A bullet leaves a standard 45-caliber pistol (5.0-in. barrel) at a speed of 262 m/s. If it takes 1 ms to traverse the barrel, determine the average acceleration experienced by the 16.2-g bullet within the gun and after that compute average force e..
What is the pressure change in water going from a 3.2- cm-diameter pipe to a 2.3- cm-diameter pipe if the velocity in the smaller pipe is 4.0 m/s
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