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A potter's wheel -- a thick stone disk of radius 0.500 m and mass 120 kg -- is freely rotating at 50.0 rev/min. The potter can stop the wheel in 6.00 s by pressing a wet rag against the rim and exerting a radially inward force of 63.0 N. Find the effective coefficient of kinetic friction between the wheel and the rag.
Two astronauts of equal mass 76 kg are holding on to opposite ends of a straight rope in space. The length of the rope between them is 18meters. What is the new angular velocity of the two astronauts
As part of a safety investigation, two 1900 {rm kg} cars travelling at 19 {rm m/s} are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.8 {rm s} to stop, and (b) car that hits a..
Two tug boats are towing a ship. Each exerts a horizontal force of 5 tons, What net force is exerted on the ship
Coyote is on a rocket that has acceleration of 10m/s^2, initially at rest at the top of a flat, level cliff. A roadrunner traveling at a constant speed of 25mil/hr passes the coyote, How far ahead of the coyote is the roadrunner when the fuse ignit..
A 4 cm radius hose pumps out gasoline at a speed of 2 m/s in to an underground tank. what is the volume of the tank
When an ambulance is stationary, the siren gives off a sound at a frequency of 500 Hz. What is the frequency of the stationary siren as perceived by an observer
How do you establish the value of theta
A ball is thrown on a projectile path with an initial vertical velocity of 30 m/s. find the initial horizontal velocity
The first-order bright fringe is a distance of 4.84 from the center of the central bright fringe. For what wavelength of light would the first-order dark fringe be observed at this similar point on the screen.
a 18 cm tall object is placed in front of a concave mirror with a radius of 26 cm. the distance of the object to the mirror is 74 cm. Calculate the magnitude of the image height
What is the Carnot efficiency of a heat engine operating between the temperatures of 300 degrees C (573 K) and 100 degrees C (373 K)
Suppose a cylindrical habitat in space 5.90 km in diameter and 37.0 km long has been proposed. How fast would the cylinder have to rotate to imitate the Earth's gravitational field at the walls of the cylinder
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