In Kundt's tube experiment the following observations : Length of the brass rod is 100cm, average length of loop in air is 10.3 cm and in carbon dioxide =8.0 cm. Calculate the velocity of sound in brass and in `CO_2`. What is the frequency of the note? (Given the velocity of sound in air at the temperature of the experiment is 350m/s).

Explanation

To solve the problem step by step, we will calculate the velocity of sound in brass and carbon dioxide, as well as the frequency of the note produced in the Kundt's tube experiment.

### Step 1: Calculate the Wavelengths

1. **For Brass:**
- The length of the brass rod (LR) = 100 cm.
- The wavelength in brass (λR) is given by the formula:
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