# Units of energy: Quiz

Question 1: When discussing amounts of energy released in explosions or ________ impact events, the TNT equivalent unit is often used.
Impact craterMeteoroidMeteoriteNear-Earth object

Question 2: In ________ the unit cm−1 = 0.0001239 eV is used to represent energy since energy is inversely proportional to wavelength from the equation E = hν = hc / λ.
Atomic emission spectroscopyAtomic absorption spectroscopyAnalytical chemistrySpectroscopy

Question 3: Because energy is defined via work, the SI unit for energy is the same as the unit of work – the joule (J), named in honour of ________ and his experiments on the mechanical equivalent of heat.
James Prescott JouleIsaac NewtonWilliam Thomson, 1st Baron KelvinMichael Faraday

Question 4: The Hartree (the ________ of energy) is commonly used in calculations.
Atomic unitsNatural unitsPhysical constantPlanck units

Question 5: In slightly more fundamental terms, 1 joule is equal to 1 newton-metre and, in terms of ________:
KilogramSI base unitMetrologyPlanck constant

Question 6: An energy unit that is used in atomic physics, particle physics and ________ is the electronvolt (eV).