the probe used in a medical ultrasound examination emits sound waves in air that have a wavelength of 0.12 mm.

good looking response

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

6 cos 34, 6 sin 34 trig

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