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A tennis ball of mass m = 60.0 g and speed v = 25.0 m/s strikes a wall at a 45º angle and rebounds with the same speed at 45º. What is the impulse (magnitude and direction) given to the ball?
The mean distance between the Earth and the Sun is 1.50×1011 m. The average intensity of solar radiation incident on the upper atmosphere of the Earth is 1390 W/m2, determine the total power radiated by the Sun
A barge has vertical sides and a flat bottom of 320 ft^2 area. when partially filled, the barge is immersed in fresh water to a depth of 2 ft. upon removal of the load the barge rises 16.0 in.
The Sun radiates energy at a rate of about 4×1026W. At what rate is the Sun's mass decreasing
A military gun is mounted on a railroad car (m = 1419 kg) as shown in the figure below There is no frictional force on the car, Find the recoil velocity of the car
A 0.030 kg lead bullet hits a steel plate, both initially at 20?C. The bullet melts and splatters on impact. How much heat is required to increase the temperature of the lead bullet and melt it
In each cycle of its operation, a refrigerator removes 8 J of heat from the inside of the refrigerator and releases 22 J of heat into the room. How much work per cycle is necessary to operate this refrigerator.
A fireman d = 49.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of ?i = 27.0° above the horizontal, at what height will the stream of water strike the building
A container holds 0.05 m^3 of ethanol at a temperature of 15 degrees celcius. The temperature is then raised to 75 degrees celcius. By how much did the volume change
You took a job as a space station scientist. On a spacewalk you get separated from the station. At what speed will you move back toward the station
You want to take a full-length photo of your friend who is 1.94m tall, using a 35.0mm camera having a 50.0mm lens, How far is the lens from the film
A ball of m1 is held slightly above ball of mass m2. The two balls are droped simultaneously, falling distance h vertically from rest. Calculate the height to which the first ball rebounds
A 0.25 kg skeet (clay target) is fired at an angle of 28 degrees to the horizon with a speed of 25 m/s.
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