In the hydrogen molecule, H2, the separation between the protons is 10?10 m. If the molecule is in its first rotational energy state, what is the angular velocity of the molecule about its center of mass?
1.8 × 10^13 rad/s
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What kind of planets are most easily detected using the Doppler method?
A) high mass planets far from their host star B) low mass planets far from their host star C) low mass planets close to their host star D) high mass planets close to their host star E) planets that have been ejected from their systems
The essentials of the first law of motion were initially developed by
a. Aristotle. b. Galileo. c. Newton. d. an unknown scientist.
The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states involved in laser action?
A) 1.537 eV B) 1.646 eV C) 1.786 eV D) 1.812 eV E) 3.572 eV
A normal heat engine is used to drive an electric generator. Part of the power from this generator runs a refrigerator that absorbs the waste heat from the engine and pumps it back into the hot reservoir.
A. first kind B. second kind