How many times does the kinetic energy of a car increase when traveling 60 mph as opposed to traveling 15 mph? K. E. increases

5
4
16
20

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)