Who developed the quantum theory in 1900 and has a constant named for him?

For a specific element, photons of how many different energies could be emitted by electrons in the n = 2 level as they return to the n = 1 level?

When an electron goes from the ground state to an excited state,

Which of these colors of light has photons of lowest energy?

A system of 18 electrons and 11 neutrons has a net charge of

Suppose that an alpha particle with a charge of  C is moving with a velocity of

When starting a truck engine, a 12-V battery supplies 250 A of current for 12.0 seconds. Calculate the energy in kilo-joules expended by the battery.

Power transmission lines are hung from metal towers on glass insulators. What current in (

What is the voltage of a battery that produces a 5.00-A current when attached to a 2.40-Ω resistance?

Calculate the resistance of an ECG machine that uses 14 A of current and operates on 120 V of electricity.