Easiest Cavendish G experimental setup

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In summary, determining the value of G in a Cavendish-like experiment can be challenging due to the need for a vibration-free environment. One method to reduce uncertainty is the frequency shift method, which measures the period of oscillations in a torsion balance. A GPS receiver can be used to obtain accurate timing pulses. However, G is still the least precise constant in physics and there is a website dedicated to exploring this difficulty.
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rockyshephear
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Can anyone suggest the absolute easiest home-made method to determine grossly the value of G in a Cavendish like experiment?
 
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One of the difficulties in using a torsion balance to measure G is in knowing the properties of the torsion fiber to a high degree of accuracy. There is another torsion balance method, called the frequency shift method, that reduces this uncertainty. The balance is allowed to oscillate freely and the period of the oscillations are measured. I think I would use this method if I were going to attempt it. You could get very accurate timing pulses from a GPS receiver.

Because of the difficulties in measuring the force of gravity, G is the least precise constant in all of physics. You may find this website interesting:
http://www.npl.washington.edu/eotwash/experiments/bigG/bigG.html
 
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1. What is the purpose of the Easiest Cavendish G experimental setup?

The Easiest Cavendish G experimental setup is used to measure the gravitational constant, G. It is an important constant in physics that helps us understand the force of gravity between objects.

2. How does the Easiest Cavendish G experimental setup work?

The setup consists of a torsion balance, which is a bar suspended by a thin wire or fiber. Two masses are placed on opposite ends of the bar and their gravitational attraction causes the bar to twist. By measuring the angle of the twist, we can calculate the gravitational constant.

3. What materials are needed for the Easiest Cavendish G experimental setup?

The setup requires a torsion balance, two masses, a thin wire or fiber, and a way to measure the angle of the twist. It is also important to have a stable and controlled environment to minimize any outside influences on the measurements.

4. What are the potential sources of error in the Easiest Cavendish G experimental setup?

Some potential sources of error include air currents, temperature changes, and vibrations. These can all affect the angle of the twist and therefore the measurement of the gravitational constant. It is important to control these factors as much as possible during the experiment.

5. What are the benefits of using the Easiest Cavendish G experimental setup?

The Easiest Cavendish G experimental setup is a simple and relatively inexpensive way to measure the gravitational constant. It can also be easily replicated and used by students and researchers alike. Additionally, the setup allows for a more accurate value of G to be determined, which can lead to a better understanding of the force of gravity.

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