An auto accelerates from 7.0 m/s at 0.71 m/s2. It travels a ...

[renzo156]

An auto accelerates from 7.0 m/s at 0.71 m/s2. It travels a distance of 1.033 km while accelerating.
 
  (a) What is the final speed at the end of that displacement?
  (b) How many seconds did it take to accelerate from 7.0 m/s?

Question 2

Once oxygen started to be manufactured by cyanobacteria, why did it take so long to build up to significant levels?
 
  A) initially most of the oxygen escaped into space
  B) oxidation of surface rock and ocean minerals occurred
  C) initially most of the oxygen produced dissolved in the oceans
  D) initially most of the oxygen was converted into water by reaction with hydrogen

[Ksanderson1296]

Answer to Question 1

(a) 39. m/s
(b) 45. s

Answer to Question 2

B

[renzo156]

Thank you!

[Ksanderson1296]

Always glad to help...