Chapter U3.2, Problem 3E

Interpretation Introduction

Interpretation : Whether the volume, height of water or both in the rain gauge changes when rainfall increases in a place needs to be determined.

Concept Introduction :

Rain gauge is a meteorological instrument used to measure rainfall in a particular place over a period of time.

Explanation of Solution

Rain gauge is a meteorological instrument used to measure rainfall in a particular place over a period of time.

Rain gauge has a funnel type device attached to a cylindrical tube to which measuring scale is attached.

When it rains, rain water falls in the funnel type of device and it goes to the measuring tube.

As the height of water level in the rain gauge increases, that represents the increase in rainfall.

Since,

  $\text{Volume }=\text{ area }\times \text{ height}$

Volume of a liquid is directly proportional to the height of the cylindrical container.

As the volume of rain increases outside, then its volume increases even in the rain gauge also then, the height of the liquid level also increases simultaneously.

Conclusion

Both volume and height of water in the rain gauge keep track of increase in rainfall in a particular place.