The Mars rover, Curiosity, has a maximum speed of only 0.14km/h. If Curiosity travels North for 60.0s, what is its displacement?

magnified images possible images can be real = projected onto a screen

the higher the current the higher the mag field around it the higher the influence on the compass

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