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Q. Assume the kinetic energy of a 50kg ice skater melts the ice she is skating on. How fast does she need to skate to melt 8 grams of solid ice which is at its melting point? - Im kinda confused on this problem i know that you use 1/2mv^2 and mlatent fusion but what else do you need, the answer the teacher showed us is 10.3m/s?
Q. A skier is accelerating down a 30.0 degree hill at 1.8 m/s^2. How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 325 m?
If air resistance & other effects are ignored how far away did the shell hit.
Two charged spheres are 19 cm apart. They are moved, and the force on each of them is found to have been quadrupled. How far apart are they now.
Approximate the position of both peaks 30 years after they were spilled. Estimate the expected future arrival time of both peaks at the water table.
A shotgun fires a large number of pellets upward, with some pellets traveling very nearly vertically and others as much as 1.0o from the vertical. suppose that the initial speed of the pellets is uniformly 150ms-1 and ignore air resistance.
W hat is the magnitude of an average force exerted on the superball by the sidewalk. what is force caused by the water on the bottom.
A train is travelling up a 4.5 degree incline at a speed of 3.25 m/s when the last car breaks free and begins to coast without friction. a) How long does it take for the last car to come to rest momentarily? b) How far did the last car travel befo..
Speedboat A negotiates a curve whose radius is 150m. Speedboat B negotiates the curve whose radius is 190m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
What is the moment of inertia of flywheel
A pencil (mass 5.8g and length 8.3cm) is at first balanced so that it is sitting vertically on a flat table. If the pencil then falls, find its angular velocity just before it strikes the tabletop. Assume that the mass of the pencil is distributed un..
how fast is the bag moving when the bults exits. If you wish to find the distance traveled using the equation d = 1/2 at2, what value should you use for a.
The radius of Venus's orbit is 0.72 times that of Earth's orbit. How much stronger is the Sun's gravitational field at Venus than at the earth.
Define Eddy viscosity and Von Karman constant using the mixing-length theory.
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