Which of these is not an example of acceleration?
a. moving at 20 m/s in a circle
b. speeding up from 5 m/s to 10 m/s
c. slowing down from 10 km/h to 5 km/h
d. moving at a constant speed of 150 km/h

D.moving at a constant speed of 150 km/h

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.