A Clock Is Moving Across an Observer's Line of Sight

question 130

Multiple Choice

A clock is moving across an observer's line of sight with its face turned toward the observer. Which of these statements about this clock, as seen by the observer, is correct?

• A) The clock will run slow compared with a clock in the observer's hand.
• B) The clock will appear longer than it would if it were at rest.
• C) The clock will appear thicker, front to back, than it would if it were at rest.
• D) The clock will appear less massive than it would if it were at rest.

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Definitions:

FedEx

An American multinational delivery services company known for its overnight shipping service and pioneering a system that could track packages and provide real-time updates on package location.

Package Tracking

A service provided by postal and courier companies that allows customers to follow the geographic location and status of their shipped items through a unique tracking number.

Short Run

A time period in economic theory during which some factors of production are fixed, affecting the decision-making process of businesses.

Long Run

A period of time in which all factors of production and costs can be fully adjusted, unlike the short run where some factors are fixed.