Is the Cavendish experiment correct?
Is the Cavendish experiment correct?
Cavendish’s equipment was remarkably sensitive for its time. Cavendish was able to measure this small deflection to an accuracy of better than 0.01 inches (0.25 mm) using vernier scales on the ends of the rod. The accuracy of Cavendish’s result was not exceeded until C. V. Boys’s experiment in 1895.
What did Cavendish discover?
Hydrogen
Henry Cavendish/Discovered
How accurate is the gravitational constant?
The gravitational constant is a physical constant that is difficult to measure with high accuracy. This is because the gravitational force is an extremely weak force as compared to other fundamental forces. This corresponds to a relative standard uncertainty of 2.2×10−5 (22 ppm).
What measures the force of gravity?
A gravimeter is an instrument used to measure gravitational acceleration. Every mass has an associated gravitational potential. The gradient of this potential is a force. A gravimeter measures this gravitational force.
How did Cavendish avoid the error?
To prevent air currents and temperature changes from interfering with the measurements, Cavendish placed the entire apparatus in a wooden box about thick, tall, and wide, all in a closed shed on his estate.
What did Cavendish Discover choose all correct answers?
Cavendish is noted for his discovery of hydrogen or what he called “inflammable air”. With a standard atomic weight of 1.008, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass.
How did Henry Cavendish change the world?
Cavendish was distinguished for great accuracy and precision in research into the composition of atmospheric air, the properties of different gases, the synthesis of water, the law governing electrical attraction and repulsion, a mechanical theory of heat, and calculations of the density (and hence the weight) of Earth …
What is the uncertainty of G?
| standard acceleration of gravity | |
|---|---|
| Numerical value | 9.806 65 m s-2 |
| Standard uncertainty | (exact) |
| Relative standard uncertainty | (exact) |
| Concise form | 9.806 65 m s-2 |
What is the unit used to measure gravity?
The gravity of Earth, which is denoted by g, refers to the acceleration that the Earth imparts to objects on or near its surface. In SI units this acceleration is measured in metres per second squared (in symbols, m/s2) or equivalently in newtons per kilogram (N/kg).
What is a measure of the force of gravity acting on an object?
Weight is a measure of the force of gravity acting on an object.