Flow rate refers to the amount (volume or mass) of fluid (liquid or gas) passing through a specific surface per unit time. When the amount of fluid is expressed by volume, it is called volume flow; when the amount of fluid is expressed by mass, it is called mass flow.
According to the above definition, which of the following options contain descriptions of volume flow?
The Caspian Sea is located at the junction of inland Europe and Asia. It is the largest saltwater lake in the world. It has 130 rivers that enter the sea, and its water storage capacity has reached 76,000 square kilometers