Loghan and kyle want to see if the type of ice cream in the freezer affects how hard or soft it is. each time they placed a new brand of ice cream in the freezer, they put it in a different place. they made sure that the freezer temperature was the same each time. they also made sure that the freezer door remained closed after each carton was placed inside it. based on their experiment design, their results should be reliable.

true

false

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.)

Energy can be transformed from one form to another. the diagram shows one such process. which energy transformation is represented in the diagram? nuclear to thermal and radiant nuclear to electrical and chemical chemical to nuclear and radiant chemical to electrical and nuclear

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?