MUST ANSWER A AND B!! Part A:
What evidence did Darwin have to support the theory of evolution?

A. breeding organisms with favorable traits
B. fossil evidence and observations of living organisms
C. recorded evidence of other scientists

PART B:
A. recorded evidence of other scientists
B. These organisms developed similar traits because their environments were at one time similar.
C. The organisms share a common ancestor from long ago.

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

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.)

Which subatomic particle has a negative charge