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A 53-kg woman contestant on a reality television show is at rest at thesouth end of a horizontal 149-kgraft that is floating in crocodile-infested waters. She and theraft are initially at rest. She needs to jump from the raft to aplatform that is several meters off the north end of the raft. Shetakes a running start. When she reaches the north end of the raftshe is running at 4.1 m/srelative to the raft. At that instant, what is her velocityrelative to the water?
A piano tuner stretches a steel piano wire with a tension of 800 N. The steel wire is 0.400 m long and has a mass of 3.00 g, What is the frequency of its fundamental mode of vibration
Define proton-proton chain efficiently
A massless pan hangs from a spring that is suspended from the ceiling. When empty, the pan is 50cm below the ceiling. What is the pan's distance from the ceiling when the spring reaches its maximum length
Many star are observed to have rotation periods that lengthenslightly with time, a phenomenon called "spin down." The rate ofslowing of the Crab Star is 3.50*10-13 s per second, which implies that if thisrate remains constant, the Crab Comet will s..
A uniform, cylindrical pulley of mass M=14.4 kg and radius R=0.478 m rotates freely about a fixed horizontal axis. estimate the magnitude of the angular acceleration of the pulley
the water level in a vertical glass tube1.50m long can be adjusted to any position in the tube. a tuning fork vibrating
On wet pavement, the coefficient of kinetic friction may be only 0.25. How fast should you drive on wet pavement
A car of mass 1054 kg moves NE at 20.12 m/s, and collides with another car of mass 1233 kg moving 27.72 m/s at 20.0° E of S. find The velocity of the heavier car after the collision
A cylinder of mass 6.6 kg and radius 0.10 m rolls along a level floor. Its center of mass has a speed of 0.8 m/s. Find the kinetic energy of rotation
A 100-coil spring has a spring constant of 380 N/m. It is cut intofour shorter springs, each of which has 25 coils. What is the angular frequency of the motion
A sled traveling at a speed of 5.0 m/s slows to a stop 4.0 m fromthe point where its passenger rolled off. What is the magnitude of the horizontal net force that slows the 110 N sled?
An ideal gas initially at Pi, Vi, and Ti is taken through a cycle as shown in the figure below where n = 5. Find the net work done on the gas per cycle
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