M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:

The frequency of a sonar pulse is given to be 4 Hz. The efficiency of a wave at a distance D can be described as E = T²/4Dkπ, where E is efficiency, T is period, and k is a scaling constant. For the sonar pulse, the efficiency is found to be X. What is the efficiency if frequency is increased to 8 Hz?

A

X/4

B

2X

C

3X

D

4X