Time Dilation: a Spaceship Approaches the Earth with a Speed

question 1

Multiple Choice

Time dilation: A spaceship approaches the 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 the earth?

• A) 69 beats per minute
• B) 73 beats per minute
• C) 65 beats per minute
• D) 61 beats per minute
• E) 80 beats per minute

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Definitions:

Regression Coefficient

A value representing the degree of change in the dependent variable for one unit of change in an independent variable in regression analysis.

Regression

A statistical process for estimating the relationships among variables, often used to predict the value of a dependent variable based on one or more independent variables.

Predict Scores

The estimated values derived from a predictive model based on independent variables.

Correlation

A statistical measure that indicates the extent to which two or more variables fluctuate together.