An Astronaut Leaves Earth in a Spaceship at a Speed

question 16

Multiple Choice

An astronaut leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. The astronaut's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year.) According to the astronaut, how long does the trip take?

• A) 14.4 y
• B) 22.7 y
• C) 9.34 y
• D) 15.0 y
• E) 4.20 y

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Definitions:

Embryonic Signposts

Critical markers or events in the development of an embryo that guide the process of embryogenesis.

Induction Genes

Genes that are activated (or induced) by specific environmental conditions or stimuli, leading to the production of functional proteins as a response.

Free Radicals

Highly reactive molecules with unpaired electrons that can cause cellular damage through oxidative stress.

Metabolic Processes

The biochemical processes that occur within living organisms to maintain life, including anabolism and catabolism.