Recent content by da_warped_1

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    What Are the Momentum and Energy of Photons from a Decaying Particle?

    hi wondering if i could get a little help with this question A particle with rest mass m has kinetic energy equal to twice its rest energy. The particle decays into 2 photons which emerge in opposite directions, one traveling in the same direction as the particle before its decay. Find...
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    Can Frame S' Make Two Events Simultaneous?

    hi, wondering if anyone could give me a little help with this question The space and time coordinates of two events are measured in frame S to be: Event 1: x1 = L, t1 = L/c Event 2: x2 = 2L, t2 = L/2c (a) find the velocity of a frame S' in which both events occur at the same time...
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    How Fast is the Alien Spacecraft Flying Overhead?

    i worked it out, just a simple miscalculation. cheers
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    How Fast is the Alien Spacecraft Flying Overhead?

    hey i just need a lil help with this question An alien spacecraft is flying overhead at a great distance as you stand in your backyard. Yyou see a bright signal light in the spaceship blink on for 190.0 ms. The commander of the spacecraft measures that the signal is on for 12.0 ms...
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    Electric Field Energy (dielectrics

    Im having some problems with this question Some cells in the human body have a layer of negative charge on the inner surface and a layer of positive charge of equal magnitude on the outer surface. The charge densities are +/- 5.0e-4 C.m^-2, the cell wall is 5nm thick and the cell wall...
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    Proton & Alpha Particle Transmission through Potential Barriers

    hi I'm having some trouble with this question: A proton and an alpha particle of identical energy encounter potential barriers of identical height and width. For which is the probability of transmission greatest and why? thanks
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