Answer: When the fluid cools, the kinetic energy of the molecules decreases. this causes the molecules to slow down and move closer together, the density of the fluid increases and the fluid sinks
Explanation: Just took the test & it gave the answer or sample response.
Answer: When the fluid cools, the kinetic energy of the molecules decreases. This causes the molecules to slow down and move closer together. Since the molecules are closer together, the density of the fluid increases and the fluid sinks.
The answer is A. waterfall To be considered as an engine , it should be a Man-made objects that could be used to produce power that creates motions. From all the options above could be used to produce such power, but the waterfall is not made by mandkind