Question k explain the operation of a wet scrubber

Question (k.) Explain the operation of a wet scrubber.

Write an essay consisting of at least 500 words addressing ALL of the following topics (a. through
f.):
a. What is the difference between wavelength and frequency?
b. If sound travels through steel at 5000 m/s and the sound frequency being transmitted is
400 Hz, what is the wavelength (meters) of the sound?
c. Describe the concept of decibels and what they represent.
d. Search the Internet for a hand-held sound level meter. Briefly present its specifications and
cost.
e. List four noise control techniques.
f. Describe methods for reducing transportation noise.
Question (a.) What is the difference between wavelength and frequency?