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A 1.0- kg mass is attached to a string wrapped around a shaft of negligible mass and having a 6.0- cm radius. A dumbbell-shaped "flywheel" made from two 0.500- kg masses is attached to one end of the shaft and perpendicular to its axis (see the figure). The mass is released from rest and allowed to fall 0.7 m to the floor. It reaches a speed of 0.9355 m/s just before striking the floor. How far apart are the masses of the dumbbell?
A rapidly spinning paddle wheel raises the temperature of 600mL of water from 21C to 25C. How much work is done in this process
It takes a minimum distance of 48.96 m to stop a car moving at 12.0 m/s by applying the brakes (without locking the wheels). Assume that the same frictional forces apply and find the minimum stopping distance when the car is moving at 26.0 m/s.
A snowboarder starts from rest and rides 39.47 m down a snow-covered slope that makes an angle of 33.19° with the horizontal, How far will she travel along the flat snow
How many kilocalories of heat are produced when the brakes are used to bring a 930 kg car to rest from a speed of 102 km/h.
Suppose a tank contains 770 m3 of neon (Ne) at an absolute pressure of 1.01×105 Pa. What is the increase in the internal energy of the neon
A very thin bubble is floating in air. If the bubble strongly reflects green light (? = 520 nm), what is the minimum possible thickness of the bubble
A photon of red light (wavelength = 710 nm) and a Ping-Pong ball (mass = 2.10 × 10-3 kg) have the same momentum. At what speed is the ball moving
The temperatures indoors and outdoors are 303 and 313 K, respectively. A Carnot air conditioner deposits 6.64 105 J of heat outdoors. How much heat is removed from the house
Find an expression for work done by the gas
A disk of radius 10 cm, initially at rest, begins rotating about its axis with a constant angular acceleration of 8.2 rad/s2. compute the angular velocity of the disk
What is the speed of projectile immediately before it hits the ground if air friction does one and a half times as much work on projectile when it is going down as it did when it was going up.
Florence, who weighs 120 lbs, stands on a bathroom scale in an elevator. What would the scale read when the elevator is accelerating downward at 2m/s2.
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