Abox of mass m1 rests on a smooth, horizontal floor next to a box of mass m2. suppose the force of 20.0 n pushes on two boxes of unknown mass. we know, however, that the acceleration of the boxes is 1.20 m/s2 and the contact force has a magnitude of 4.45 n. find the mass of box 1 and box 2.

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

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.)