The number of times that a wave vibrates in a unit of time is called
a. amplitude
b. frequency
c. wavelength
d. interference

During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f