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The mass of the electron, 0.000,000,000,091 kg, can be written in shorthand notation as A. 9.1 x 10^(-11) kg B. 9.1 x 10^(-12) kg C. 9.1 x 10^(-10) kg D. 9.1 x 10^(-9) kg

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Damian Avila · Answer 1 · 2017-01-05T20:12:07+0000

The answer is B. 11 Hz.

Frequency is always measured in Hertz (Hz), so it can't be C. or D. anyway, but the way to work this out is to do 22 ÷ 2 to work out 11 Hz, because you work out frequency as per second. Also, the formula is f (frequency) = V (velocity) / λ (wavelength).

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