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A 21.7-kg child descends a slide 3.5 m high and reaches thebottom with a speed of 2.2 m/s. How much thermal energy due tofriction was generated in this process?
A glaucous-winged gull, ascending straight upward at 5.00m/s , drops a shell when it is 14.0m above the ground. how long did it take for shell to hit the ground?
The gravitational potential energy of all the water stored behind a very large dam is 1.2Ã-10^16 J, How far apart should you place the charges
A bullet is fired at a stationary wooden block at 200 m/s. The mass of the block is 2kg the bullet embeds in the block during the collision. What is the mass of the bullet
A 170 g ball attached to a spring with spring constant 2.1 N/m oscillates horizontally on a frictionless table. Its velocity is 22 cm/s when xo= 4.3 cm. What is the ball's position when the acceleration is maximum
In a head-on collision, the car stops in 0.279 from a speed of 16. The driver has a mass of 68, and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a second.
If a flea can jump straight up to a height of 22.0 , what is its initial speed as it leaves the ground, neglecting air resistance?
An aquarium contains a 5 - cm layer of water ( n = 1.333) floating on top of carbon tetrachloride ( n = 1.461) what is the angle of refraction into the air
Jack was exposed to fast neutrons; he received a radiation dose of 160 rem on part of his hand, affecting 27.0 grams of tissue. The relative biological effectiveness (RBE) of these neutrons is 11.0.
Estimate the pressure increase required to impart
When a proton (+1.6 x 10^-19 C) moves .10 m along the direction of an electric field of strength 3.0 N/C, what is the magnitude of the electrical potential difference between the protons initial and ending points
A proton moves through a magnetic field at 25.5% of the speed of light. find the magnitude of the magnetic force acting on the proton
A starship lands on a planet of mass 6*10^23 kg. An astronaut throws a rock of mass 9.5 kg up from the ground at 17 m/s. what is the gravitational acceleration on the rock
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