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A spinning object has a moment of inertia of 1.6 kg*m2. It is rotating at a rate of 1 rad/s. If the moment of inertia increases to 3 kg*m2, what is its new rotational velocity?
What is the magnitude of the electric field 19.7 cm directly above an isolated 3.25×10^?5 C charge? What is the direction of the electric field? Downward or upward?
A skier slides horizontally along the snow for a distance of 25 m before coming to rest. how fast was the skier going
A speeder is pulling directly away and increasing his distance from a police car that is moving at 23 m/s with respect to the ground. The radar gun in the police car emits an electromagnetic wave with a frequency of 7.00 109 Hz.
The supersonic aircraft Concorde has a length of 62.7m when sitting on the ground on a typical day when the temperature is 18.0 C. find the temperature T of the Concorde's skin in flight
your friend gets a at tire while driving up a road with a 35.0 slope. While changing the tire he lets go of the spare and it begins to roll down the hill. How fast (m/s) is the tire moving when it hits the ..
A kite is hovering over the ground at the end of a straight 45-m line. The tension in the line has a magnitude of 14 N. Find the height of the kite
find the mass of Earth from the period T and the radius r of the Moon's orbit about the Earth. T=27.3 days and r=3.82E5 km. suppose the Moon orbits the center of Earth rather than the center of mass of the Earth-Moon system.
A tennis player swings her 1000g racket with a speed of 10m/s . She hits a 60g tennis ball that was approaching her at a speed of 21m/s. what is the average force that the racket exerts on the ball
A 0.450-kg block of wood hangs from the ceiling by a string, and a 7.30×10?2-kg wad of putty is thrown straight upward, How high does the putty-block system rise above the original position of the block
an early cyclotron had a diameter of 30 cm and used a magnet capable of applying a magnetic field of 2.0 T. What was the max kinetic energy of the protons
A Ferris wheel is moving at an initial angular velocity of 1.0 rev/53 s. If the operator then brings it to a stop in 2.8 min, what is the angular acceleration of the Ferris wheel
The intensity of sunlight that reaches Jupiter (orbiting at about 5 AU) is approximately what fraction of that at Earths orbital distance.
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