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at the top of a giant swing on the high bar,a 50kg gymnast's velocity is 1 m/s,and he is 3.5 m high. What is the gymnast's total mechanical energy at this instant?
An isotope of phosphorus called P-32 is radioactive. It decays with half life of 14.3 days with the emission of beta particle. A 1.0 m?Ci source of P-32 is implanted in a tumor where it would deliver radiation dose of 28.6 Gy.
A parallel beam of light containing red (660 nm) and blue (470 nm) wavelengths goes from polystyrene to water, What is the angle between the two colors in water
A student m1 = 70 kg runs towards his skateboard, which has a mass m2 = 2.6 kg and is d = 2.8 m ahead of him. What is the velocity of student and skateboard
Two generators use the same magnetic field and operate at the same frequency. Find the coil radius r of this other generator
a playground carousel is rotating counterclockwise about its center on frictionless bearings. Find the final angular speed of the carousel after the person climbs aboard
q1. a student calculates the frequency of a waveform produced through a tuning fork to be 303 hz. if the tuning fork is
An airplane flying upward at 35.3 m/s and an angle of 30.0° relative to the horizontal releases a ball when it is 255 m above the ground. find the time of it takes the ball to hit the ground
A dog with a mass of 20 kg is sitting on a board with a mass of 5 kg. The board is on ice and is free to slide without friction. What is the resultant velocity of the board
Your car tire is rotating at 3.3 rev/s when suddenly you press down hard on the accelerator. What was the tire's angular acceleration
A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 655 m/s. What is the horizontal distance between the end of the rifle and the bull's-eye
An electron is accelerated through 15 kV and is then allowed to circulate at right angels to a uniform magnetic field with B = 25 mT. What is its path raduis
An engine transfers 2.5 X 103 J of energy from a hot reservoir during a cycle and has an efficiency of 0.3. How much heat is transferred as exhaust to a cold reservoir
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