SONAR stands for "sound navigation and ranging,” and it is used to map and explore the ocean floor.
Answer:
thank for making me give up on life
Explanation:
I thought the stuff I had was hard wth is even that
Answer:
The frequency increases by a factor of 3.
Explanation:
The relation between speed, wavelength and frequency of a wave is given by :

or

A wave travels at a constant speed. If the wavelength is reduced by a factor of 3, it would mean that the frequency increases by a factor of 3 because there is an inverse relationship between wavelength and frequency.