The de broglie wavelength of an electron with a velocity of 9. 00 × 106 m s-1 is m. The mass of the electron is 9. 11 × 10-28 g.

Earth's atmosphere is unique among the planets and is able to support life because it contains a large amount of a) oxygen b) helium c) methane d) carbon dioxide

The different forms of a gene for a given trait are called .

Zachary has been trying to work on an essay for almost three hours, be he can't seem to focus for more than 15 or 20 minutes at a time. what should he do so that the quality of his work doesnt suffer because of poor concentration and lack of energy