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A gamma ray of 2.75 MeV from 24Na undergoes pair production in a lead shield. a) How much kinetic energy (MeV) is shared by the two electron masses? a) How is it distributed among them?
just when charliw wants to sit down, a 240 lb bully pushes him away with a force of 450 N. what is the force exerted by charlie brown on the bully
A stunt man drives a car at a speed of 20m/s off a 30-m-high cliff, How far from the base of the cliff does the car land and What is the car's impact speed
Calculate the orbital period of Neptune (in yr) from knowledge of G, the mass of the sun (M = 1.99*10^30 kg), and the orbital radius of Neptune of 3.00*10^1A.U
You walk from your house 0.25 miles West to Fred's house, What is your displacement from your initial position
a 25-kg iron cannonball is fired with speed 220 m/s. If it hit a concrete wall, how much does the temperature of the cannonball increase
The internal energy of a gas is 1000j. The gas is compressed adiabatically and it's volume deceases by 400cm^3. What is internal energy of gas
A car is traveling down a hill that makes an angle of 13° with the horizontal. The driver applies her brakes, evaluate the acceleration of the car
If the 2 kg mass slides on a horizontal frictionless surface, what is the speed of the mass 4 kg while it has fallen a distance 0.4 m downward from its rest position.
The work needed to remove an electron from the surface of sodium is 2.3 eV. How big maximal velocity will have electrons if the surface of sodium will be illuminated with ultraviolet light wave length
paid $20 an hour. working for 7 days straight , 14 hours every day 7am to 9pm. How much are you going to be paid
The spin cycles of a washing machine have two angular speeds, 431rev/min and 622rev/min . The internal diameter of the drum is 0.440m. Find the laundry's maximum tangential speed
A force F acts on a 10kg object at rest for 3s and changes its velocity to 6m/s. What is the change in momentum of the object, What is the impulse of the force on the car
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