Question

Which of the following is the most appropriate unit to describe the rate at which water flows over Niagara Falls?

Day per billion gallons, because the independent quantity is volume of water in billion gallons and dependent quantity is time in days.

Billion gallons per day, because the independent quantity is volume of water in billion gallons and dependent quantity is time in days.

Billion gallons per day, because the independent quantity is time in days and dependent quantity is volume of water in billion gallons.

Day per billion gallons, because the independent quantity is time in days and dependent quantity is volume of water in billion gallons.

Answer 1

Billion gallons per day, because the independent quantity is volume of water in billion gallons and dependent quantity is time in days.

Answer 2

the second option

Answer 3

"Billion gallons per day, because the independent quantity is time in days and dependent quantity is volume of water in billion gallons." makes more sense I think.

Answer 4

sorry, misread, its the 3rd : Billion gallons per day, because the independent quantity is time in days and dependent quantity is volume of water in billion gallons.

Answer 5

time is a constant, therefor independent quantity. (unless you go into special relativity, but i dont think we really need to here)

Answer 6

Thank you :)

Answer 7

no worries