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Joey, whose mass is 37kg , stands at rest at the outer edge of the frictionless 240kg merry-go-round, 2.1m from its center. The merry-go-round is also at rest. Joey then begins to run around the perimeter of the merry-go-round, finally reaching a constant speed, measured relative to the ground, of 5.0 m/s.
Part A. What is the final angular speed of the merry-go-round in rad/s?
two forces f1 and f2 are acting on a mass m6.0 kg. the force f1 5.0i 7.0j 2.0k in n. the acceleration of the mass is
You have a great summer job working in a cancer research laboratory. Your team is trying to construct a gas laser that will give off light of an energy that will pass by the skin but be absorbed by cancer tissue.
In an experiment, monochromatic light of λ= 400. nm is incident on a a single slit by a width of 1600.nm. Bright and dark fringes are view on a screen and teh angular positions of the maxima and the minima are measured.
At its Ames Research Center, NASA uses its large "20-G" centrifuge to test the effects of very large accelerations ("hypergravity") on test pilots and astronauts. How fast must the astronaut's head be moving to experience this maximum acceleration
A 72.0 kg base runner begins his slideinto second base when he is moving at a speed of 4 m/s. The coefficient of friction between hisclothes and Earth is 0.70. He slides so that his speed is zero justas he reaches the base.
What is the fundamental minimum uncertainty in a measurement of the position of an electron by speed .290c and wavelength 8.01×10-12 m if its momentum is simultaneously measured to a precision of plus or minus one percent (two percent total)?
A 0.060 kg tennis ball, initially moving at a speed of 12 m/s,is truck by a racket causing it to rebound in the oppositedirection at a speed of 18 m/s. What is the change in momentum of the ball?
The concrete wall of a building is 0.10m thick. The temperature inside the building is 20.0 °C, while the temperature outside is 0°C. Heat is conducted through the wall.
Two parallel circularrings of radius R=1 m have their centers on the x-axis separated bya distance of 2 m. What is the net electric field in the center of the right ring
It is desired that 7.5C of charge be stored on each plate of a 4.5 -F capacitor. What potential difference is needed between the plates?
A physics book slides off a horizontal tabletop with a speed of 2.70{\rm m}/{\rm s} . It strikes the floor in 0.350{\rm s} . Ignore air resistance. Find the height of the tabletop above the floor
question the largest transformer ever built handles a power of 1.50x109 w. this transformer is used to step down 765
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