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A 70 kg rock lies at the bottom of a lake. If the volume of the rock is 30,000 cm3, how much force is needed to lift it? The density of water is 1.0 g/cm3.
q1. a sled is pushed by 12 monkeys with a constant force until it reaches a velocity of 18.9 ms. all 12 monkeys stop
A cannon tilted up at a 25 degree angle fires a cannon ball at 81.0m/s from atop a 18.0m -high fortress wall
A circuit consists of a battery with a closed circuit, a terminal voltage of 12.0 V, and 1.0-?, 2.5-?, 5.5-?, and 7.0-? resistors connected in series, Calculate the equivalent resistance of the circuit
a 63-kg water skier is pulled up a 14.0 degree incline by a ropeparallel to the incline with a tension of 512 N. find the magnitude and direction of the skier's acceleration
How fast should a car move toward. A cardinal (Richmondena cardinalis) of mass 3.90×10-2 and a baseball of mass 0.144 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of the baseball's moment..
A cosmic-ray proton is moving at such a speed that it can travel from the Moon to Earth in 1.5s. At what fraction of the speed of light is the proton moving
A block starts from rest at the top of a 30.0° inclined frictionless plane and after travelling 1.00 m encounters a spring, how much would the block compress the spring
The speed of a sinusoidal wave on a string depends on:
The red block in the %u201CSame Volume%u201D floats in water. what volume of the blue block would float above the water line if the blue block was placed on top of the red block in the water
A 600 turn solenoid is 15cm long. the current in it is 35A. a3.0cm long straight wire cuts through the center of the solenoid,along the diameter. the wires carries a 23A current downward. What is the magnitude of the force on this wire assuming the s..
A 2.0-kg ball is attached to the end of a 2.5-m string to form a pendulum. This pendulum is released from rest with the string horizontal
An aluminum wire with a cross-sectional area of 3.9 x 10^(-6) m^2 carries a current of 1.9 A. Find the drift speed of the electrons in the wire
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