Examlex
The de Broglie wavelength of an electron with a velocity of 6.90 × 106 m/s is ________ m.The mass of the electron is 9.11 × 10-28 g.
Exotic Birds
Birds that are not native to a particular area and have been introduced from other regions, often as pets or for aviaries.
Endangered
refers to species that are at serious risk of extinction in the wild in the near future if the factors threatening their survival and reproduction do not improve.
Household Pets
Domesticated animals kept for companionship or pleasure rather than for work or survival.
Extirpated
Refers to a species that has been removed or destroyed entirely from a specific geographic area, though it exists elsewhere.
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