A Spaceship Approaches Earth with a Speed 0

question 80

Multiple Choice

A spaceship approaches Earth with a speed 0.50c.A passenger in the spaceship measures his heartbeat as 70 beats per minute.What is his heartbeat rate according to an observer that is at rest relative to Earth?

• A)61 beats per minute
• B)65 beats per minute
• C)69 beats per minute
• D)73 beats per minute
• E)75 beats per minute

---

Definitions:

Free Energy

A thermodynamic quantity that represents the amount of energy in a system that is available to do work.

Reactants

Substances initially present in a chemical reaction that are consumed during the reaction to create products.

Endergonic Reactions

Chemical reactions that require an input of energy to proceed and are characterized by a positive change in free energy.

Exergonic Reactions

Chemical reactions that release energy, generally in the form of heat, and occur spontaneously.