TigerDan925 - Man who escaped science cult, Funny translation
Dear TigerDan925,
Fact check = You FAIL
So now you are relying on the words of an unknown person, on some talk show, as "proof" that the Cavendish experiment yielded false results?
This unknown man (Risitas, who is he really?) is ignorant and has no understanding of science, as he laughs at the 1798 Cavendish experiment ONLY because it uses "two balls."
Here is the real scientific scoop on that experiment...
Cavendish found that the Earth's density was 5.448 ± 0.033 times that of water.
Cavendish's apparatus for experimentally determining the value of G (Isaac Newton's gravitation constant) involved a light, rigid rod about 2-feet long. Two small lead spheres were attached to the ends of the rod and the rod was suspended by a thin wire.
Once the torsional force balanced the gravitational force, the rod and spheres came to rest and Cavendish was able to determine the gravitational force of attraction between the masses. By measuring m1, m2, d and angle, the value of G could be determined. Cavendish's measurements resulted in an experimentally determined value of 6.75 x 10-11 N m2/kg2.
Today, the currently accepted value is 6.67259 x 10-11 N m2/kg2.
The value of G is an extremely small numerical value.
In 1686 Isaac Newton realized that the motion of the planets and the moon as well as that of a falling apple could be explained by his Law of Universal Gravitation, which states that any two objects attract each other with a force equal to the product of their masses divided by the square of their separation times a constant of proportionality.
F = (G * M1 * M2) / d*d
Newton was not particularly concerned to evaluate the constant of proportionality, G, for two reasons. First, a consistent unit of mass was not in widespread use at the time. Second, he judged that since the gravitational attraction was so weak between any pair of objects whose mass he could sensibly measure, being so overwhelmed by the attraction each feels toward the center of the earth, any measurement of G was impractical. However, Newton estimated this constant of proportionality, called G, from the gravitational acceleration of the falling apple and an inspired guess for the average density of the Earth.
More than 100 years elapsed before G was first measured in the laboratory.
In 1798 Cavendish and co-workers obtained a value accurate to about 1%.
When asked why he was measuring G, Cavendish replied that he was "weighing the Earth"; once G is known the mass of the Earth can be obtained from the 9.8m/s2 gravitational acceleration on the Earth surface.
Published on - December 7, 2016
Discussion at - https://www.youtube.com/channel/UC7ipUKERU0tzYFxALJBli4A/discussion
Video at - https://www.youtube.com/watch?v=lCnLRikqAws
Our home page all articles- http://flatearthlunacy.com
kind regards, JonahTheScientist
- -