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3). what is the frequency of an electron traveling at 2.65M/S. The mass of an electron...

3). what is the frequency of an electron traveling at 2.65M/S. The mass of an electron is 9.11×10^-28 g.

4). The conversion of microwave energy to thermal energy in the microwave oven is 92%. How many photons are needed to heat 150 ML of water from 20°C to 100°C, if the wavelength of the microwave photon is 1.22×10^8 nm?
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