A racing car can complete an 800 m long lap in 14 s. What is the speed of the
car?

57.1 m/s

Explanation:

Speed = Distance/Time

Speed = 800/14

Speed = 57.1 m/s (3sf)

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

the closer the planet is to the sun, the larger the gravity