A parachutist of mass 75kg descends with an acceleration of 8 m/s2. What is the upward force exerted by the air on the parachutist?

The slope of a position-time graph of an object gives the speed of the object. True False

An automobile engine delivers 55.0 hp. How much time will it take for the engine to do 6.22 * 105 J of work? One horsepower is equal to 746 watts. Answer in units of s.

Does coefficient of linear expansion depends on length

What happens when an unstoppable force meets an immovable object?

Which is the correct scientific notation for 724000000000

A sound wave traveling at STP has a period of. 0023 seconds. The wavelength of this sound is closest to 1) 1.4E5 2) 6.9E-6 3) 0.76m 4) 76m

Static charge develops on a substance as it acquires or loses protons due to friction. a. True b. False

A milk truck carries milk with density 64.6 lb/ft3 in a horizontal cylindrical tank with diameter 12 ft. (a) Find the force exerted by the milk on one end of the tank when the tank is full. (Round your answer to the nearest integer.) lb

Which human activity contributes to air pollution

Cooler stars age much faster than hotter stars true or false