An electron in a mercury atom changes from energy level b to energy level f when the atom absorbs a single photon. Classify the absorbed photon as one of the types of electromagnetic radiation listed in the electromagnetic spectrum, showing your work.

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?

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

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