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A tennis ball is dropped from a height of 190 cm above theground. It has a mass of .0572 kg. How can I figure out the speedof the ball just before it hits the ground, and the speed of the ball just before it leaves the ground, using the conservation of energy?
A person is standing at the edge of the water and looking out at the ocean (see figure). The height of the person's eyes above the water is h = 1.8 m, and the radius of the Earth is R = 6.38 x 106 m. (a) How far is it to the horizon? In other word..
How much heat must be absorbed by ice of mass m = 720 g at -10 degrees Celsius to take it to liquid state at 15 degrees Celsius
A spherical 3-mi diameter comet impacts the earth with a velocity of 20 mi/s. Calculate the amount of heat released from the impact site
A wooden block of mass M resting on a frictionless, horizontal surface is attached to a rigid rod of length and of negligible mass. What is the angular momentum of the bullet-block system about a vertical axis through the pivot
What is the maximum amount of energy that is stored in a volcano if the chamber is 5.5x10^4 meters wide, 7.2x10^4 meters long, thickness =500meters, located at 1200 meters deep, and the crust has a density of 2600 kg/m^3? show work please
Ocean waves (on a particularly nice summer day) move past at 1.8 waves/s. find the speed of the waves
The drive motor is shifted to turn the carousel at a higher constant rate of rotation, Calculate the coefficient of static friction between the bag and the carousel
A 50.0 g ball of copper has a net charge of 1.7 µC. What fraction of the copper's electrons have been removed
A 2.30-? F capacitor is fully charged by being connected to a 6.0-V battery. The fully charged capacitor is then connected to a 0.250-H inductor.
A 20.0 kg box rests on a table. What is the weight of the box and the normal force acting on it
A toy cannon uses a spring to project a 5.28 g soft rubber ball. The spring is originally compressed by 5.06 cm and has a force constant of 8.08 N/m. At what point does the ball have maximum speed
A power of 1 horesepower is equivalent to 746 W. What is the power output in horsepower of an electric motor that draws acurrent of 4 A at 120 V and is 80 percent efficient
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