A rough model of falling raindrops as spheres leads to the following two equations for the drag force and the terminal velocity: drag=2 term=‾‾√

The C and k constants depend on such things as the density of air, density of water, and the acceleration of gravity.

For rain drops falling at terminal velocity, the rate at which mechanical energy is dissipated is then proportional to which of the following?

i think its c if i'm wrong

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me