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At the local playground a boy on a swing has a speed of 3.06 m/s when the swing is at its lowest point. Find to what maximum vertical height does the boy rise if the speed is reduced to 1/3 the initial speed?
question sphere 1 with radius r1 has positive charge q. sphere 2 with radius 2.00 r1 is far from sphere 1 and initially
a person rides on a 12-m-diameter ferris wheel that rotates at the constant rate of 6.6 rpm. calculate the magnitude
Hoover Dam was built in the 1930s to provide electricity for the southwest U.S. and to prevent the wild Colorado River from flooding. how does pressure vary with depth along the wall of the dam
An air bubble has a volume of 1.25 cm3 when it is released by a submarine 100 m below the surface of a lake. What is the volume of the bubble when it reaches the surface
a 1.6-kg block on a horizontal frictionless surface is attached to a spring whose force constant is 190 nm. the block
An astronaut travels from a distant star to the Earth at speed0.995c. The astronaut ages 4.9 years through his journey. What the distance from the star to the Earth is as gauged by an observer on the Earth?
suppose that the charge on the electron and proton did not have the same magnitude but instead differed by one part in
Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. find the angular speed of the neutron star
A sample of helium-4 behaves as an ideal gas as it is heated at constant pressure from 292 K to 402 K. If 19 J of work is done by the gas during this process, what is the mass of helium present?
On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 2.5 times as far as he would have on earth, what is the maximum height of the ball
How many kilograms of water at 100 degrees Celsius can be converted to steam by the addition of 1.13X10^7 joules of thermal energy.
An alpha particle (q = +79e, m = 6.68 x10^-27kg) is fired from a distance of 10 cm at a gold nucleus (q = +79e). find the change in electric potential for the alpha partical
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