A Bat Emits a Sound at a Frequency of 30

question 12

Multiple Choice

A bat emits a sound at a frequency of 30.0 kHz as it approaches a wall.The bat detects beats such that the frequency of the echo is 900 Hz higher than the frequency the bat is emitting.The speed of sound in air is 340 m/s.The speed of the bat is closest to

• A) 20.0 m/s.
• B) 530 m/s.
• C) 10.0 m/s.
• D) 30.0 m/s.
• E) 5.02 m/s.

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Definitions:

Compounded Quarterly

The calculation of interest on the principal amount and any accumulated interest every three months.

Quarterly Withdrawals

The act of taking money out of an account or investment four times a year.

Deposit

An amount of money placed in an account, typically to keep it safe or to earn interest.

Annual Contributions

The amount of money contributed to a particular account or investment over the course of a year.