Replacing a proton with a neutron
Question: In a magnetic field with B=0.50 T, for what path radius will an proton circulate at 0.10 to the speed of light? What will its kinetic energy be? What will change if we replace a proton with a neutron? Why?
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Our Milky Way galaxy is 100,000 ly in diameter. A spaceship crossing the galaxy measures the galaxy's diameter to be a mere 1 ly. What is the speed of the spaceship relative to the galaxy? and How long is the crossing time as measured in the galax
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