A Certain Unstable Particle Has a Mean Lifetime of 1

question 19

Multiple Choice

A certain unstable particle has a mean lifetime of 1.52 × 10^-6 s.This is the time interval between its creation in a nuclear process and its extinction into decay products,as measured in a frame of reference at rest with respect to the particle.An average such particle is observed by a scientist on Earth to travel 342 m in its lifetime.What is the speed of the particle relative to Earth? (c = 3.00 × 10⁸ m/s)

• A)0.821c
• B)0.681c
• C)0.600c
• D)0.551c
• E)0.335c

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Definitions:

Copper

A reddish-brown, ductile, malleable metallic element that is an excellent conductor of heat and electricity and is widely used in electrical wiring and coinage.

Concrete

A composite building material composed of fine and coarse aggregates bonded together with a fluid cement that hardens over time, used extensively in construction.

Heat Produced

The amount of energy released or absorbed as heat during a chemical or physical transformation.