What Is the Momentum of an Electron Moving at a Speed

question 61

Multiple Choice

What is the momentum of an electron moving at a speed of 0.90 c? (m_e = 0.511 MeV/c² = 9.11 $\times$ 10^-31 kg)

• A) 3.1 \(\times\) 10^-22 kg·m/s
• B) 2.5 \(\times\) 10^-22 kg·m/s
• C) 5.6 \(\times\) 10^-22 kg·m/s
• D) 4.4 \(\times\) 10^-22 kg·m/s
• E) 2.5 \(\times\) 10^-23 kg·m/s

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Definitions:

Fibula

A long, slender bone located on the lateral side of the tibia in the lower leg, playing a key role in stabilizing the ankle and supporting lower leg muscles.

Gastrocnemius

A major calf muscle that plays a key role in walking, jumping, and running by flexing the foot at the ankle and the leg at the knee.

Posterior Compartment Syndrome

A condition involving increased pressure within the posterior compartment of the leg that can compromise circulation and nerve function, often caused by injury.

Drumming Fingers

Repetitive tapping of the fingers against a surface, often unconsciously executed as an outlet for psychological energy or an expression of impatience or nervousness.