Question

An electron of mass 9.11 x 10 -31 kg moves with a speed of 0.8725 c. What is its momentum?

Answer 1

Explanation:

momentum = mass × velocity

mass = 9.11 × 10^-31

velocity = 0.8725 multiplied by c ( which is the speed of light )

therefore velocity = 0.8725 × 3 × 10^8 = 2.6175 × 10^8 m/s

$m = 9.11 \times 10 {}^{ - 31} \times 2.6175 \times 10 {}^{8}$

$m = 9.11 \times 2.6175 \times 10 {}^{ - 31 + 8}$

$m = 23.85 \times 10 {}^{ - 23} kgms {}^{ - 1}$

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