Police are investigating an accident. they know that tom brady was driving 20 m/s before being hit by jay z head on. tom brady’s car has a mass of 1100 kg and jay z’s has a mass of 1475 kg. they also know that the two cars stuck together and were traveling 7 m/s in the same direction as jay z was driving. the speed limit was 25 m/s, was jay z speeding?

m = mass of tom brady's car = 1100 kg

v = initial velocity of tom brady's car before collision  = - 20 m/s

M = mass of jay Z's car = 1475 kg

V = initial velocity of jay Z's car before collision = ?

V' = velocity of the combination after collision = 7 m/s

Using conservation of momentum

m v + MV = (m + M) V'

(1100) (- 20) + (1475) V = (1100 + 1475) (7)

V = 27.14 m/s

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​