The Rate at Which Water Flows Out of a Drain

question 19

Multiple Choice

The rate at which water flows out of a drain in the bottom of a certain tank is proportional to the height of water in the tank. The tank is a vertical cylinder with cross-sectional area of 1.0 m², so that every 1 cm in height represents 10 L. If the flow is 10 L/min (i.e. 1 cm/min) when the water level is 700 cm, how long will it take for the level to go from 700 cm to 30 cm?

• A) 4586 minutes
• B) 670 minutes
• C) 9 minutes
• D) 2205 minutes

---

Definitions:

Psychological Dependence

Refers to the emotional or mental attachment to a substance, behavior, or activity, leading to a feeling of needing it to function or feel normal.

Physical Dependence

A state where the body has adapted to a substance, leading to withdrawal symptoms when the use of the substance is significantly reduced or stopped.

Tolerance

The act or capacity of enduring or being less responsive to a substance (e.g., drugs, alcohol) or stimulus over a period of exposure, or an attitude of acceptance and openness towards the beliefs or practices different from one's own.

Drugs

Substances that are used to treat, cure, prevent, or diagnose a disease or to promote well-being.