Finding the Length of a Resonating Air Column

Thread starter soulja101
Start date Dec 3, 2006
Tags

Air Column Length

Click For Summary

To find the shortest air column closed at one end that resonates at 440Hz with a speed of sound of 352m/s, the fundamental frequency formula for a closed tube can be applied. The wavelength is calculated as the speed of sound divided by the frequency, resulting in a wavelength of 0.8m. For a closed-end air column, the length is one-fourth of the wavelength, leading to a required length of 0.2m. The discussion emphasizes using the correct formulas and understanding the relationship between frequency, wavelength, and the properties of the air column. This approach provides a clear method to solve the problem effectively.

Dec 3, 2006

soulja101

Homework Statement

What is the shortest air column, closed at one end, that will resonate at a frequency of 440Hz, when the speed of sound of 352m/s

Homework Equations

the patterns

The Attempt at a Solution

ive tried

Physics news on Phys.org

Dec 4, 2006

AlephZero

Science Advisor

Homework Helper

See your other post - the same hints apply.

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

View full post »