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A proton and an electron have the same kinetic energy and travel in parallel paths as they enter a region of constant magnetic field. They each begin to move in circular paths. What is the ratio of the radii?
A box is sliding with a speed of 4.50 m/s on a horizontal surface when, at point P, it encounters a rough section. Use the work-energy theorem to find how far this box slides before stopping
A 0.66-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.14 to 0.25 m (relative to its unstrained length) the speed of the sphere decreases from 6.15 to 4.55 m/s. What is the spring constant of the spring?
The coefficient of kinetic friction between her skis and the snow.
Explain how long is the bullet in the target? What average force does the bullet exert on the target? What is the target's speed just after the bullet emerges?
A worker pushing a 35.0-kg wooden crate at a constant speed for 11.5 m along a wood floor does 320 J of work applying a constant horizontal force of magnitude F0 on the crate. (a) Determine the value of F0. (b) If the worker now applies a force great..
the medians of a right triangle that are drawn from the vertices of the acute angles have lengths of 2radic3 and
The now-discontinued Concorde flew at Mach 1.3, which meant the speed of the plane was 1.3 times the speed of sound in air. What is the angle among the direction of propagation of the shockwave and the direction of the plane's velocity?
A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 40 at 20°C. what is the temperature coefficient of resistivity
You rub an inflated balloon on the carpet andit acquires a potential that is 1500 V lower than its potential before it became charged. If thecharge is uniformly distributed over the surface of the balloon andif the radius of the balloon is 13.0 cm..
A cat jumps off a piano that is 1.3 meters high. How far from the edge of the piano does the cat strikes the floor
an astronaut on the moon weighs only one sixth of what he weighs on earth. explain why period does not depend on the mass of pendulum
1. a straight wire of length 0.62 m carries a conventional current of 0.8 amperes. what is the magnitude of the
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