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A light string is wrapped around a 0.160-kg hollow 0.080-m-radius hoop. The hoop is released from rest and the fee end of the string is held in place.
(a) What is tension in the string while the hoop falls?
A thermos contains 159 cm3 of coffee at 93.7 °C. To cool the coffee, you drop two 13.2-g ice cubes into the thermos. What is the final temperature of the coffee
A blue ball is thrown upward with an initial speed of 23.3 m/s, from a height of 0.7 meters above the ground. 2.9 seconds after the blue ball is thrown, What is the speed of the blue ball when it reaches its maximum height
a 2.0kg block of wood rests on a long tabletop. A 5.0 g bullet moving horizontally with a speed of 150 m/s is shot into the block and sticks in it. Find the speed of the block just after impact
A crate of mass 47 kg is pushed across a level floor by a person. what is the work done by the person
A point source emits sound waves with a power output of 120 W. At what distance will the decibel reading be 140 dB, which is noise level of a loud indoor rock concert
At a distance of 1.41 m from a point charge of +2.74 ?C, how many of the additional equipotential surfaces are crossed by the time the electric field has shrunk to one-half of its initial value
Estimate the distance of GPS satellite from the ground.
A Michelson interferometer splits a beam of light of unknown wavelength producing a bright fringe (i.e., all of the intensity) at the detector, What is the wavelength of the unknown light
Telescopes can be networked together to give an apparent aperature equal to their separation. Telescopes on either side of Earth can be combined to give an aperature of 8000 miles, greatly improving resolving power. What is this technique called?
A ball rolls off a table with a horizontal velocity of 5 m/s If it takes 0.6 secs for it to reach the floor, What is the verticle componet of the balls velocity just before it hits the floor
A wheel has a radius of 3.6m. How far (path length) does a point on the circumference travel if the wheel is rotated by angles of 30°, 30 rad, and 30 rev, respectively.
The only two forces acting on a body have magnitudes F1 and F2 and directions that differ by an angle ? (in radians). what is the mass of the body
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