Which of these characteristics can only be attributed to a wave of red light? a) the energy of the wave travels in the same direction as the wave travels. b) the wave travels by vibrating the particles of the medium at a high rate. c) the wave travels by compressing and expanding the medium it travels through. d) the energy of the wave moves perpendicular to the direction the wave travels.

D)  

The energy of the wave moves perpendicular to the direction the wave travels.

Explanation:

I had this question on USA test prep and this was the correct answer

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

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