Sound from a source vibrating at frequency 200 Hz travels at the speed of 300 m/s in air. Wavelength of the sound is (in m/s) a) 15
b)1.5
c)150
d)6​

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.

Explain what will happen if decomposers were apsent from a forest ecoysystem.

Which if these is an etiquette rule? (american football) question 10 options: a. debating with the ref over a call b. not communicating with your team c. post-game handshake d. taunting