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| the branch of physics that deals with sound and sound waves |
| nonmechanical energy transfer with reference to a temperature difference between a system and its surroundings |
| mass spectrometer or mass spectroscope | |
| —n | |
| an analytical instrument in which ions, produced from a sample, are separated by electric or magnetic fields according to their ratios of charge to mass. A record is produced (mass spectrum) of the types of ion present and their relative amounts | |
| mass spectroscope or mass spectroscope | |
| —n | |