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Estimate the force on a 145-gram baseball if it hits the bat at 50 miles per hour and stays in contact with the bat for 0.1 second, during which time it reverses direction and leaves the bat at 75 miles per hour. Express the result in newtons and in pounds and explain your answer.
what is the final equilibrium temperature of the system?
A device used in radiation therapy for cancer contains 0.52 g of cobalt-60 (59.933 819 u). Determine the activity (in Bq) of the radioactive material
A 280 block on a 58 long string swings in a circle on a horizontal, frictionless table at 90.0 . What is the speed of the block.
In the meantime, the velocity of airplane Q relative to the air is 250 m/s in the direction of N 20o W. What is the speed of airplane Q relative to the airplane P.
Calculate the torque required to accelerate the Earth in3days from rest to its present angular speed about its axis. Calculate the average power required
a student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 20m/s the stone travels 100 m horizntally and hits the beach. what is the height of the cliff
A newly discovered planet has a mass of 7.88 x1026 kg, and has a satellite whose mass is 6.44 x 1011 kg. what is the gravitational attraction between them
What's the definition of quantum physics, in layman's terms?
A plane of a 5.0 cm x 8.0 cm rectangular loop of wire is parallel to a 0.19 -T magnetic field. The loop carries a current of 6.2 A. What is the magnetic moment of the loop
A playground merry-go-round has radius 2.10m and moment of inertia 2200kg*m^2 about a vertical axle through its center, compute the average power supplied by the child
A ball is thrown upward from a platform 4.6 m high with a speed of 16 m/s, What is the magnitude of its velocity when it hits the ground
You jump from the top of a boulder to the ground 1.85 m below. Calculate your deceleration on landing
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