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A 55kg swimmer is standing on a stationary 210kg oating raft.The swimmer then runs off the raft horizontally with a velocity of+4.6m/s relative to the shore. Find the recoil velocity that the raft would have if there were no friction and resistance due to the water.
a 0.210-a current is charging a capacitor that has circular plates 15.8 cm in radius. the plate separation is 4.00 mm.a
A 800kg , light-weight helicopter ascends from the ground with an acceleration of 3.50m/s2. What is the work done by the net force on the helicopter?
The buildup of plaque on the walls of an artery may decrease its diameter from 1.0cm to 0.85cm. Find the speed of blood flow within the plaque region
A 10-kg block is set moving with an initial speed of 6 m/s on arough horizontal surface. how far does the block travel before it stops
The far point of a nearsighted person is 5.1 m from her eyes, and she wears contacts that enable her to see distant objects clearly. How high is the image formed by the contacts
A sudent of mass m = 49 kg wants to measure the mass of a playground merry-go-round, which consists of a solid metal disk of radius R = 1.5 m that is mounted in a horizontal position on a low-friction axle. She tries an experiment:
A long straight wire carries a current of 6.2 A. The wire is horizontal in the plane of the page (screen), Calculate the force that acts on the electron
An astronaut has two objects that are identical in all respects,except that one is painted black and the other is painted silver. Initially, they are at the same temperature.
a mass spectrometer can detect the different isotopes of an ionized element. if zn2 ions are accelerated through a 10
A container of volume 0.30 m3 contains 3 mol of argon gas at 31°C. suppose argon behaves as an ideal gas, find the total internal energy of the gas.
The projectile remains in flight for 6 seconds and travels a horizontal distance D of 155m. Calculate the speed at which the rock was launched
What type of weather front will be responsible for the following weather forecast? "Cool today with rain becoming heavy by this afternoon. Slightly warmer tomorrow. "Winds south easterly becoming westerly to north westerly by the tomorrow morning."
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