Acar is traveling south at a speed of 52 miles per hour and then begins traveling at a speed of 53 miles per hour but continues traveling in the same direction. which of the following has changed?

a. mass
b. density
c. velocity
d. volume

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d