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An explosion breaks an object initially at rest into two pieces, one of which has 2.8 times the mass of the other. If 8700 J were released in the explosion, how much kinetic energy did the heavier piece acquire?
A stone is dropped at t = 0. A second stone, with twice the mass of the first, is dropped from the same point at t = 179 ms. How far below the release point is the center of mass of the two stones at t = 386 ms
In the figure below, the converging lens' focal length is 13 cm, d = 18 cm, and the diverging lens' focal length is -12.6 cm, How tall is the image formed by the diverging lens
The seed has a mass of 250 mg., a functional lift-to-drag ratio of 4.0, a lift coefficient under the same conditions of 0.3, and a wing area of 5000 mm2. How long will it take to hit the ground
A 40-kg pole vaulter running at 14 m/s vaults over the bar. Her speed while she is above the bar is 1m/s. Avoid air resistance, in addition to any energy absorbed by the pole, and determine her altitude as she crosses the bar.
At the instant the alpha particle leaves the nucleus, the centers of the two are 7.5 apart and essentially at rest. Find their speeds while they're a great distance apart. Treat each particle as a spherical charge distribution.
If a violin string transmits waves at 375 m/s and has 295 Hz as its fundamental frequency, what is the string's length.
A hollow cylinder (hoop) is rolling on a horizontal surface at speed 5.5m/s when it reaches a 11?incline. How far up the incline will it go
Three balls are constrained to move on the circumference of a circle of radius R. find the characteristic frequencies of the system
Two parallel planes have surface charge densities +5.0 nC/m2 and -3.0 nC/m2. What is the magnitude of the electric field between them
A 238 kg cast-iron car engine contains water as a coolant. Suppose the engine's tempera- ture is 33C when it is shut off and the air temperature is 8C. What mass of water is used to cool the engine
a generator at hoover dam can supply 396 mw of electrical power. assume that the turbine and the generator are 83.1
A 40.0 kg wagon is towed up a hill inclined at 17.3° with respect to the horizontal. How fast is the wagon going after moving 80 m up the hill
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