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A pot of hot water is boiling on your stove. The pot is in the shape of a round cylinder made of aluminum which is 10 cm in radius. The aluminum is 3 mm thick. You notice that after 23 minutes, 0.15 kg of water has boiled away. What is the temperature of the inner surface of the bottom of the pot? How much energy is required to boil away M kg of water? What is the difference in temperature between the inner and outer sufaces of the aluminum bottom of the pot? What is the change in entropy of the boiling water after boiling away 0.15 kg of water?
Fred Jones owns 56 shares of the Robust Corporation's stock. Robust announces a 3 for 2 stock split. Explain how many shares will Fred have after this split?
A coin is dropped from a hot-air balloon that is 295 m above the ground and rising at 8.5 m/s upward. Find the maximum height reached for the coin in meters
A train is traveling up a 3.3 incline at a speed of 2.45 when the last car breaks free and begins to coast without friction. Explain how long does it take for the last car to come to rest momentarily?
Two sound sources radiating in phase at a frequency of 485 Hz interfere such that maxima are heard at angles of 0 and 22° from a line perpendicular to that joining the two sources. Find out the separation between the two sources.
A planet moves in an elliptical orbit around the sun. The mass of the sun is Ms. The minimum and maximum distances of the planet from the sun are R1 and R2, in that order.
Suppose the charge of one is increased by twenty seven times while the charge of the other is reduced to one-third its initial value. What would their separation distance have to be changed to in order to keep the force between them the same?
Two charged Ping-Pong balls separated by the distance of 1.62 m exert an electric force of 0.0234N on each other. What will be the force if the objects are brought closer, to a separation of only 31.4 cm.
A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 210 mi/h in 3.00 s. Find the average acceleration of the plane
What is the magnitude of the runner's total displacement . What is the phase difference between the two waves next they reach the observer.
A block starts with a certain speed at the top of a frictionless inclined plane with an unknown angle to the horizontal. To calculate the time required for the block to reach the bottom of the plane.
A hockey player got checked into the boards and was knocked unconscious. It takes 95N of force to drag the hockey player across the ice at a constant speed.
A box is lifted with a pry bar , by slipping the bar under the box and lifting up on the bar. what is the size of the force required to lift the box
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