The maps above show the arrangements of Earth's continents and oceans 65 million years ago and at present. Which of the following best explains the change seen in the Atlantic Ocean over the last 65 million years?
A.
Magnetic forces pushed continents toward each other to make the Atlantic Ocean basin smaller.
B.
Magnetic forces pulled continents apart to make the Atlantic Ocean basin larger.
C.
Tectonic plate motion caused the Atlantic Ocean basin to decrease in size.
D.
Tectonic plate motion caused the Atlantic Ocean basin to increase in size.

Asuppose a suitcase has a mass of (m) 30 kg and a net force (n) of 10 kg*m/s. what is the acceleration rate of the suitcasein m/s? show your work to support your answer.

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.)

What is special about a dc circuit ?