PLEASE HELP ONLY NINE DAYS LEFT I WILL GIVE BRANLIEST Jennifer and Mark make paper airplanes. They are conducting an experiment to see which airplane design will travel a longer distance. What do they need to do to properly conduct their experiment?

A. Apply the same force of motion when they release the airplanes.
B Apply different forces of motion when they release the airplanes.
CThrow one airplane into the wind and the other airplane against the wind.
D Use the force of the wind to decide which will travel farther.

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Suppose water is leaking from a tank through a circular hole of area ah at its bottom. when water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cah 2gh , where c (0 < c < 1) is an empirical constant. a tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (assume the removed apex of the cone is of negligible height and volume.) (a) suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. the differential equation governing the height h in feet of water leaking from a tank after t seconds is dh dt = − 5 6h3/2 . if the height of the water is initially 8 feet, how long will it take the tank to empty? (round your answer to two decimal places.)