1. Encuentre las componentes xy y de un vector de posición que tiene una magnitud de r = 75.0 m y un angulo relativo al eje x de a) 35°y b)
65°.

R. a) rx = 61.4 m; ry = 43.0 m
b) rx = 31.7 m; ry = 68.0 m

e/c, where e is its total energy

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

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures