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A figure skater is spinning at a rate of 1.0 rev/s with her armsoutstretched. She then draws her arms in to her chest,reducing her rotational inertia to 67% of its original value. What is her new rate of rotation?
The sun radiates energy at a rate of 3.86*10^26 W. Its radius is 7.0*10^8m. what is the intensity of solar radiation at the top of the earths atmosphere
A .430 kg block of wood hangs from the ceiling by a string, and a 7.10 x 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
A flashlight on the bottom of a 4.15 m deep swimming pool sends a ray upward andat an angle so that the ray strikes the surface of the water1.80 m from the point directly abovethe flashlight
The mass of a certain planet is 6.15×1023 kg, and its radius is 2535 km. What is the acceleration due to gravity on the planet's surface
A 2.0 kg mass (mA) and a 5.50 kg mass (mB) are connected to a lightweight cord that passes over a frictionless pulley. The pulley only changes the direction of the force exerted by the rope.
An object of mass 5.41 kg is released from rest and drops 2.05 m to the floor. The collision is completely inelastic. How much kinetic energy is lost during the collision
A driver measures her "cold" tire gauge pressure to be 1.97 105 Pa. The measurement is made before driving, Find the final temperature of the air in the tires
Suppose a proton accelerator is 3.99 m long and must accelerate protons from rest to a speed of 1.15 x 107 m/s. Ignore any relativistic effects and determine the magnitude of the average electric field
A model rocket is fired vertically from rest. It has a net acceleration of 17.0 m/s2. estimate how high does the rocket travel
Near Neverland Ranch, there is a big beautifulpink dam. First thing in the morning of everyday, Michael Jacksonopens his window and gazes at this big beautiful pink dam. And heexclaims, “Hurray for pink, my favorite color!!”.Unfortunately, one day..
Two cars, A and B, are traveling in the same direction, although car A is 158 m behind car B. The speed of A is 26.8 m/s, and the speed of B is 18.6m/s. How much time does it take for A to catch B?
In a crystal an electron is confined to a cubical region of length 0.5nm on a side. estimate the minimum allowed KE of the electron
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