A 110kg box is pushed across a surface with a kinetic mu of 0.060. The box accelerates at 0.4m/s. What force was used?

1 - wave length

2 - amplitude

3 - crest

4 - trough

explanation:

duh.

if they have a finite resultant

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

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