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You swing a 3.00 kg stone in a circle, using the full length of a thin 75.0cm rope. At what speed should you swing it so its acceleration will be 9.8 m/s^2?
A 1500 kg elevator moves upward with constant spped through a veticle distance of 25m. Explain how much work was done by the tension in the elevator cable?
A 2,700-kg satellite is in a circular orbit around a planet. The satellite travels with a constant speed of 6,270 m/s. The radius of the circular orbit is 8.72 × 10^6 m. What is the acceleration of satellite.
GPS satellites orbit the Earth at an altitude of 12,500 miles. How long does it take these satellites to make a complete orbit of the Earth?
A horizontal beam of electrons initially moving at 4.2 107 m/s is deflected vertically by the vertical electric field between oppositely charged parallel plates, What is the charge per unit area on the plates
A ball moving at a speed of 3.0 m/s hits an identical stationary ball. what is the velocity and direction of the incoming ball after the collision
A 2.6-kg cart is rolling along a frictionless, horizontal track towards a 1.4-kg cart that is held initially at rest. What is the total momentum of the system of the two carts at this instant
Suppose the magnitude of the electric field in an electromagnetic wave is doubled, By what factor does the maximum intensity of the wave change
A radar signal takes 2.7s to go to the moon and return. How far away was the moon at that time
Water moves through a constricted pipe in steady, ideal flow. At the lower point the pressure is 169000 Pa and the pipe radius is 2.80 cm. Find the volume flow rate through the pipe
A 5 kg block, measuring 10 cm per side, is held 50% submerged in water by a helium balloon. what is the diameter of the balloon
in a classical model of the hydrogen atom the electron orbits the proton in a circular orbit of radius 0.053 what is
a 100 kg car travelling at 20 ms collides with a 100 kg car traveling at 8 ms in opposite direction a if the two cars
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