A glass bulb contains air and mercury. What fraction of the bulb must be occupied by mercury if the volume of air in the bulb is to remain constant at all temperatures? The coefficent of linear expansion of glass is `9xx10^(-6)//K`.

Explanation

To solve the problem of determining the fraction of the bulb that must be occupied by mercury in order to keep the volume of air constant at all temperatures, we can follow these steps:

### Step 1: Understand the Problem
We have a glass bulb containing air and mercury. We need to find the fraction of the bulb that must be occupied by mercury (let's denote this fraction as \( x \)) such that the volume of air remains constant despite temperature changes.

### Step 2: Define Variables
- Let the total volume of the bulb be \( V \).
- The volume occupied by mercury will be \( xV \).
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