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Two astronauts, each having a mass of 78.3 kg, are connected by a 8.3 m rope of negligible mass. They are isolated in space, orbiting their center of mass at speeds of 5.44 m/s.
By pulling the rope, the astronauts shorten the distance between them to 3.01 m. What is the new angular velocity of the astronauts? Answer in units of rad/s
A storm cloud and the ground represent the plates of a capacitor, How much sap in the tree can be boiled away, Model the sap as water initially at 26.0°C
The suspension cables on the Brooklyn Bridge are 15.75 in. diameter wire ropes. Estimate the total drag force on one of the cables in a 40 mph wind if the length of one cable is about 3000 ft and the air temperature is 70o F.
Starting from rest, a 2.4x10-4 kg flea springs straight upward. What is the flea's speed when it leaves the ground
A train traveling east at a speed of 25.0 m/s moving directly awayfrom a stationary observer. a strong, steady wind of 20.0 m/s isblowing from east to west. At a distance of 50.0 meters away fromthe observer, the train's whistle is blown and the o..
q1. the wind blows with a force of 425n north on a sail boat while the water exerts a force of 325n west on the
A 37-kg girl is bouncing on a trampoline. All through a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 215 J from 430 J. How high does she rise during this interval? Avoid air resistance.
the index of refraction for violet light in silica flint glass is 1.66 and that for red light is 1.62. what is the
A 5?, 10?, and 15? resistor are connected in parallel and the combination connected in parallel to a 15 V battery with negligible resistance. What is the current through the battery
A football is punted with an initial velocity of 28.7 m/s and an initial angle of 54.1o. What is its hang time
Discuss the relative merits of using the Biot-Savart law and Ampere's law to calculate the magnetic field around the wire. In this case, is it necessary to include the Maxwell correction to Ampere's law?
For exercise, a 60 kg athlete runs up a 10-m high hill in 30 seconds. Assume the efficiency of the human body is 25%. Determine her metabolic power
A cartoon coyote sets out to capture the elusive road-runner by wearing a pair of ACME jet-powered roller skates, which provide a constant horizontal acceleration of 10 m/s^2. The coyote starts off at rest 100 m from the edge of a cliff at the ins..
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