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:

Activity Variance

The difference between the planned activity and actual activity levels, often used in budgeting and forecasting.

Servicing Materials

Items and supplies used in the maintenance and repair of machinery, equipment, or products to ensure their continued operation or use.

Budgeting

The process of creating a plan to spend your money, forecasting income and expenditures over a set period.

Medical Supplies

Items used in medical care, ranging from consumables like syringes and bandages to more complex equipment such as defibrillators and patient monitoring systems.