An Airplane Flying Faster Than the Speed of Sound of 340

question 48

Multiple Choice

An airplane flying faster than the speed of sound of 340 m/s produces a shock wave that makes an angle of 50° with the direction the plane is flying.What is the speed of the plane?

• A) 490 m/s
• B) 530 m/s
• C) 390 m/s
• D) 440 m/s
• E) 405 m/s

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Definitions:

Covariance

A measure that indicates the extent to which two variables change together; if they increase or decrease similarly.

Coefficient Of Correlation

An index that measures the magnitude and direction of a straight-line association between two variables.

Coefficient Of Correlation

An analytical tool that evaluates the strength of the association between the relative shifts of two variables.

Independent Variables

Independent variables are the factors in an experiment that are manipulated or changed by the researcher to investigate their effects on the dependent variables.