A student repeats a reaction several times to test the effects of various changes on the reaction rate. The data table shows the results. Based on these results, how would decreasing the concentration of the reactants change the reaction rate? reaction experiment A. Decreasing the concentration would have no effect on the reaction rate. B. Decreasing the concentration would increase the reaction rate. C. More information is needed to determine what would happen to the reaction rate. D. Decreasing the concentration would decrease the reaction rate.

What happens to the velocity of the car when the upward pull of the cable is greater than the downward pull of gravity as the car rises toward the top?

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

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.)