A Proton Is Moving at 3

question 19

Multiple Choice

A proton is moving at 3.0 × 10⁶ m/s and experiences a magnetic force of magnitude 2.5 × 10⁻¹⁶ N. If the magnetic field makes an angle of 40° with respect to the velocity of the proton, what is the field's magnitude?

• A) 1.7 × 10⁻⁴ T
• B) 3.3 × 10⁻⁴ T
• C) 4.1 × 10⁻⁴ T
• D) 8.1 × 10⁻⁴ T
• E) 1.6 × 10⁻³ T

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Definitions:

Overweight

Having more body fat than is optimally healthy, typically measured by a body mass index (BMI) over 25.

Obese

A medical condition characterized by excessive body fat that presents a risk to health.

Teenagers

Individuals in the age group of 13 to 19 years, characterized by rapid physical, emotional, and cognitive changes.

Leptin

is a hormone produced by fat cells that helps to regulate energy balance by inhibiting hunger, thereby influencing body weight and appetite.