What is the speed of an electron with a de Broglie wavelength of 0.20 nm?

Explanation:

Given

de Broglie wavelength = 0.20nm

Required

Determine the speed (v)

The speed is calculated using the following formula;

Where

Substitute these values in the above formula

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Convert 0.2nm to metre (m)

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Multiply both sides by v

Apply law of indices

Divide both sides by

Apply law of indices

Hence;

The velocity is

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s