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A 25.0-kg crate is initially at rest at the top of a ramp that is inclined at an angle θ = 30? above the horizontal. You release the crate and it slides 1.25 m down the ramp before it hits a spring attached to the bottom of the ramp. The coeffcient of kinetic friction between the crate and the ramp is 0.400 and the constant of the spring is k = 5000 N/m. How far does the crate compress the spring?
A sinusoidal ac voltage source in a circuit produces a maximum voltage of 12.6V and an rms current of 7.50mA. Find voltage amplitude
A tortoise can run with a speed of 11.7 cm/s, and a hare can run 18.1 times as fast. How long does the race take
A container holds 1.0g of argon at a pressure of 8.0 atm. How much heat is required to increase the temperature by 100 degrees Celsius
A ball is dropped from the top of the building. The ball falls3 times farther during its last second in freefall than its thirdsecond of freefall. how long was the ball in the air
0.60 kg rubber ball has a speed of 2.30 m/s at point A and kinetic energy of 8.3 J at point B. (a) Determine the ball's kinetic energy at A (b) Determine the ball's speed at B (c) Determine the total work done on the ball from A to B
A sodium surface is bombarded by photons that have a wavelength of 200 nm. Compute the energy of the photons
Derive the expression for the volume of liquid passing per seconds, V, through a pipe when the flow is steady. Assuming that v is proportional to (i) the coefficient of viscosity n of the liquid
The 9 inch long elephant nose fish in the Congo River generates a weak electric field around its body using an organ in its tail. How many electrons would be required to create that charge
It has been suggested that rotating cylinders about 9.0 mi long and 6.0mi in diameter be placed in space and utilized as colonies. What angular speed should such a cylinder have so that the centripetal acceleration at its surface equals the free-fall..
Tom's rocket ship is moving away from Kathy at 0.75c. He fires a laser beam in the backward direction, toward Kathy. According to Galilean relativity. How fast does the laser beam move relative to Kathy, assuming that Tom observes the beam to move..
A thunderstorm drops 6.0cm of rain on a city that covers an area of 33 km by 45 km. approximation the number of raindrops that fell during the storm. You could assume the diameter of a raindrop is 2 mm.
what is the magnitude of an objects average velocity if an object moves from a point with coordinates x 2.83 m y
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