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A 200KeV electron (i.e., an electron having kinetic energy of 200KeV) collides with a 200KeV positron (a particle with opposite charge of electron but) moving in the opposite direction in a head-on collision. The electron-positron pair annihilate each other and emit two equal-energy photons. (a) Write the law of conservation of energy for this process putting in all appropriate values. (b) write the law of conservation of momentum for this process putting in all appropriate values.
A curve is banked at an angle of 30 degrees with respect to the horizontal. what is the ideal speed for a motorist to take the curve when it is covered by glare ice
Consider purchasing a new tire with a warranty of 6.4 x 10^7 meters. Calculate the thickness of the tread that will be worn away with each revolution of the tire
Suppose that a small incandescent light bulb (R=2.88 kilo ohms) is connected to a standard European household AC electrical socket, Find the average power dissipated by the light bulb
An electric wire that has a mass of 5 kg for a 20m length is strung between two poles 20 m apart. What must be the tension in the wire if it is to take .80 seconds for a pulse to travel along the wire from one pole to the other.
A bead of mass m = 6.90 kg is released from point A and slides on the frictionless track as shown in the figure below. The height of A is ha = 6.10 m. Determine the bead's speed at points B and C
A water bed for sale has dimensions of 1.83 m x 2.13 m x 0.229 m. Find the weight of the water in the bed
consider an object of mass 0.1 kg oscilaating on a spring with an x- component of position given by x = (2m) cos ((5/s)t - pi/6), find the total energy of the mass/ spring system
Explain how fast would it be moving after it had fallen a distance of 0.010 m? (Assume that the gravitational force is constant over the distance of the fall, and that the star is not rotating.)
The top of the pool table is 0.810 m from the floor. The placement of the tape is such that 0 m aligns to the edge of the table, At what speed did his pool ball hit the ground
You swing a 2.60 kg stone in a circle, using the full length of a thin 60.0 cm rope. At what speed must you swing it so its acceleration will be 9.8 m/s^2.
Your spaceship lands on an unknown planet. To determine the characteristics of this planet, you drop a 1.20 kg wrench from 3.00 mm above the ground, Express the planet's mass in terms of the earth's mass
Two identical springs (neglect their masses) are used to "play catch" with a small block of mass 110g, Determine the spring constant of the two springs
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