A Particle Physicist Observes Cosmic Rays Creating a New Particle

question 11

Multiple Choice

A particle physicist observes cosmic rays creating a new particle high in the atmosphere,and the speed of this particle is measured at 99.7% the speed of light.It is unstable,and is observed to decay in an average 37.0 μs.If this particle were at rest in the laboratory,what would be its average lifetime?

• A)2.9 µs
• B)18 µs
• C)5.3 µs
• D)12 µs
• E)4.3 µs

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Definitions:

Unconsciously

Performing actions or having thoughts and feelings without being aware of them.

Communicate

The process of conveying information, feelings, or ideas from one individual or group to another through various means, verbal or nonverbal.

Curve Of Forgetting

A theory describing how information is lost over time when there is no attempt to retain it, typically showing a steep decline in memory retention within the first 24 hours.

Remember

The ability to recall information, experiences, or people from the past.