2. What do pitch and loudness have in common? Both are measured in decibels, or dB.
Both depend on a wave's frequency.
Both are subject to a person's interpretation.

What is a frequency of a wavelength

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?