How is the reading of a barometer affected when it is taken to (i) a mine, and (ii) a hill ?

Answer

To solve the question regarding how the reading of a barometer is affected when it is taken to a mine and to a hill, we can break it down into two parts:

### Step 1: Understanding Barometric Pressure
A barometer measures atmospheric pressure. Atmospheric pressure is the weight of the air above a given point. It decreases with altitude (as you go higher) and increases with depth (as you go lower).

### Step 2: Effect of Going to a Mine
When you take a barometer into a mine, you are going deeper underground. As you descend into the mine, the weight of the air above you increases, which results in an increase in atmospheric pressure. Therefore, the reading of the barometer will **increase** when taken to a mine.

### Step 3: Effect of Going to a Hill
Conversely, when you take a barometer to a hill, you are ascending to a higher altitude. As you go higher, the weight of the air above you decreases, leading to a decrease in atmospheric pressure. Therefore, the reading of the barometer will **decrease** when taken to a hill.

### Conclusion
- **In a mine:** The barometer reading **increases** due to higher atmospheric pressure.
- **On a hill:** The barometer reading **decreases** due to lower atmospheric pressure.