Which of the following statements is not true about speed?
a. speed has no direction.
b. speed is a vector quantity.
c. speed and position are separate variables.
d. speed is measured relative to another object.

as technology advances, new experiments often expose problems in accepted theories. c

hope i

-lavira: )

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.