The observation of a wet spot on a hot highway in the summer is ...

[ghost!]

The observation of a wet spot on a hot highway in the summer is caused by
 a. dispersion.
  b. diffraction.
  c. refraction.
  d. reflection.

Question 2

A 1000-kg automobile moving with a speed of 24 m/s relative to the road collides with a 500-kg automobile initially at rest. If the two stick together, what is the velocity in m/s of the two cars after the collision according to an observer in a truck moving 10 m/s in the same direction as the moving cars?
 a. 6
  b. 11
  c. 24
  d. 26
  e. 31

[abro1885]

Answer to Question 1

c

Answer to Question 2

a

[ghost!]

Thanks for the timely response, appreciate it

[matt95]

TYSM