Determine the net force (Fnet) on an object that experiences the forces shown. SP2. Obtain, evaluate, and communicate information about how forces affect the motion of objects..c.
Use mathematical representations to calculate magnitudes and vector components for typical forces
including gravitational force, normal force, friction forces, tension forces, and spring forces
20 N of downward gravity force
15 N of rightward applied force
20 N of upward normal force
10 N of leftward friction force

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

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

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr