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At the instant before a particle collision at the Belle Experiment, an electron is moving north with a total energy of 8 GeV, and a positron is moving south with a total energy of 8 GeV. What is the speed of the electron as seen by the positron?
A 2.03 kg book is placed on a flat desk. Suppose the coefficient of static friction between the book and the desk is 0.502, How much force is needed to keep the book moving at constant speed once it begins moving
A flight attendant pulls her 69N flight bag a distance of 246m along a level airport floor at a constant velocity. The force she exerts is 37N at an angle of 58° above the horizontal. Find the coefficient of kinetic friction between flight bag and..
Physics - Classical Mechanics - Inclined Plane, A packing crate is placed on a plane inclined at an angle of 350 from horizontal. If the coefficient of static friction
In a 6.5×10?3-m3 volume of ideal gas at the pressure of 2.7×106 Pa, How many molecules are in the sample
What is the kinetic energy of a 1,500 kg car with velocity of 72.0 km/hr? How much work must be done on the car to bring it to a complete stop.
The sun produces energy by nuclear fusion reactions, in which matter is converted into energy. How many kilograms of matter does the sun lose each second
A woman in a movie fires a gun and is pushed backwards. The mass of the bullet is 0.050 kg and the bullet velocity is +850 m/s. What is the recoil velocity of the woman
A CD rotating at 1200 rpm starts slowing down at a constant rate such that, after the first two seconds, it has made 10 rotations. Find the time needed for the CD to come to rest
A source delivers an AC voltage of the form ?v = 92.2 sin (60?t), Find the rms voltage of the source
Suppose the highway is icy and the coefficient of friction between the tires and pavement is only one-third what you found in part (1). What should be the maximum speed of the car so it can round the curve safely.
A single electron orbits a lithium nucleus that contains three protons (+3e). The radius of the orbit is 1.76 10-11 m. Determine the kinetic energy of the electron.
You pull your 55.00 kg friend on a 5.00 kg sled across a patch of snow. You pull using a 48-N force on a rope that makes a 35 degree angle with the horizontal. If the friction force between the sled and the snow is a mere 5-N what is the normal fo..
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