As shown in the figure below, Luis rushes 40 m toward his truck. He notices he forgot his shoes and returns back to his house. His total travel time is 60 s.
40 m
40 m
What is Luis's average velocity over the 60 s period?

What is Luis's average speed over the 60 s period?

if a star is moving toward earth, its light waves appear to be squeezed together. hope it

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.

it's a b and