How much horsepower would a high performance car need to run the speed of sound arrive before the sound of its engine arrives? assuming 4514 lb curb weight assume no wind assume no driveline losses of vehicle travelling at the speed of sound (760 mph - 1116.4ft/sec) what you need to know: hp fsum x v/hp f drag 1/2 pv*2 cda f rolling resistance crr x weight f sum f drag +f rolling resistance cd .398 a 26.72 fta2 crr .015 p.002377 slugs/ft 3

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

Oxygen and nutrients are moved through the body by the: a. circulatory system c. lymphatic system b. digestive system d. reproductive system

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?