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A 3.0 kilogram object moves to the right with a speed of 2.0 m/s. It collides in a perfectly elastic collision with a 6.0 kilogram object moving to the left at 1.0 m/s. Evaluate the total kinetic energy after the collision?
An organ pipe is 1.17 m long. The temperature of the air is 20 degree C. What is the fundamental harmonic frequency of this pipe when it is closed at one end
A transformer with a turns ratio (secondary:primary) of 1:81 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit. What is the voltage supplied to the recharger? V
The average speed of the atoms in a 3.9 g sample of helium gas is 607 m/s. Estimate the thermal energy of the sample
The sound level, ß, measured at a radius r = 11.00 meters from a point sound source that is emitting sound equally in all directions is 95.17 dB, what is the sound power emitted by the source
A man is riding a bike, the wheels of a bike have an angular velocity of +22.0 rad/s. Then, the brakes are applied. Estimate the angular acceleration of each wheel
The electric potential immediately outside another charged conducting sphere is 190 V, Determine all possible values for the radius of the sphere
A girl delivering newspapers covers her route by traveling 9.99 blocks west, 4.00 blocks north, and then 1.00 blocks east
A sledge with bricks has a total mass of 180.0 kg and is pulled at a constant speed by a rope inclined at 20 degrees above the horizontal. The sledge moves a distance of 20 m on a horizontal surface.
On a spacecraft, two engines fire for a time of 598 s. One gives the craft an acceleration in the x direction of ax = 4.92 m/s^2, Calculate the magnitude of the initial velocity
A catapult launches a rock at a 50° angle with respect to the horizontal. Find the maximum height attained if the speed of the rock at its highest point is 30.3 m/s
A gymnast with mass m1 = 49 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 119 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end ..
Sheena can row a boat at 2.97 mi/h in still water. She needs to cross a river that is 1.24 mi wide with a current flowing at 1.67 mi/h. How long does it take her to cross the river
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