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An electron and a positron anihilate with equal and opposite momenta and become two photons: e- + e- → 2 photons. Both the electron and the positron have mass me and momentum of magnitude mac.
(a) Explain why the electron and positron cannot annihilate to become a single photon.
(b) What are the magnitudes of the momenta of the photons?
A deep sea diver should breath a gas mixture that has the same oxygen partial pressure as at sea level, What is the partial pressure of oxygen at sea level
The figure shows a graph of the power dissipated in a resistor as a function of the resistance. What quantity does the slope of this graph represent?
An electron is released from rest1.5cm from an infinite charged plane. It accelerates toward the plane and collides with a speed of3.0107m/s. What is the surface charge density of the plane
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What is the speed of the second asteroid? Now suppose that the first and second asteroids carry charges of 3.68 C and -3.68 C, respectively. How fast would the second asteroid have to be moving in order to occupy the same circular orbit as before?
A skateboarder shoots off a ramp with a velocity of 6.6 m/s,directed at an angle of 58° above the horizontal. The end ofthe ramp is 1.2 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take a..
A simple loop circuit contains an inductor with inductance 2.45×10?2 H and a capacitor. what is the maximum current through the circuit
question1a golf ball with an initial angle of 30deg lands exactly 214 m down range on a level course.a neglect air
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