Select the two statements that explain why fewer waves were recorded at
some stations
A. Part of Earth's interior bent some of the waves.
B. Different materials in Earth reflect some of the waves.
C. Some waves are blocked by water on the Earth's surface.
D. Weather events near the stations can prevent waves from being recorded.

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.)

Aspring that is stretched 2.6 cm stores a potential energy of 0.053 j. what is the spring constant of this spring?

Which factor listed below most likely results in the loss of genetic variation from small populations? question 2 options: mutation migration genetic recombination genetic drift