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An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?