Comments by "Flook D" (@flookd5516) on "Jubilee"
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@jenarcana Density is mass per volume; weight is the action of gravity on mass.
In a constant gravitational field all objects fall at the same rate in a vacuum. When there is an atmosphere there is resistance directly related to the area interacting with the atmosphere; the resistance is buoyant force, the strength of that force being directly related to gravity. While the interacting area is dependent on the object's shape & orientation, the object's density also affects how much surface area is interacting with the atmosphere. A polystyrene ball can have the same mass as ball bearing but will meet more resistance as it passes through the atmosphere. You and a mouse have similar densities but the mouse has a greater ratio of surface area to volume than you; if both of you jumped down a mine shaft the mouse would be sufficiently slowed to be able to walk away at the bottom. Most objects have sufficiently high density that the difference is negligible.
However if an object is less dense than the medium it is passing through then the buoyant force will be greater than gravity and it will rise, since the medium is also being pulled downwards.
Weight is the action of gravity on mass and the two are directly proportional. You have considerably more mass than a gnat and and hence weigh considerably more. The gnat only has to lift its own weight, not yours. The assertion you are repeating assumes that a constant gravitational field means everything has the same weight, something that is obviously not true.
Gravity was demonstrated to exist by the Cavendish experiment, reproduced countless times with similar results, that measured the horizontal attraction between masses. The subsequent Schiehallion experiment used a similar approach. Gravitational waves are changes in the distortion of space-time brought about by the motion & interaction of two very large masses (exactly how is beyond my knowledge of the subject); they were demonstrated to exist 5 years ago.
That density exists is obvious; it is the ratio of mass to volume. There is no evidence that it act as a force. According to Dubay's principle, a phone lying flat in your hand is pressed against your hand by the difference in density of hand & air. This predicts that when you turn your hand over the phone will continue to be pressed against your hand but instead it falls down at 9.8m/s^2. It predicts that placing it flat against a wall leads to the phone being held there but instead it falls down at 9.8m/s^2. It predicts that if you let go of your phone in mid-air then the equal density of the air surrounding it means your phone will just float but instead it falls down at 9.8m/s^2. Predictions are important in science; whether an idea makes correct predictions is indicative of its accuracy. Dubay's density does not work which is why he never talks about such experiments.
NASA was established in 1958 AD; the ancient Greeks determined the Earth was a sphere around 500BC using reasoning and the methods I described earlier. Still waiting on any explanation for how NASA managed to influence them. No explanation has ever been provided as to how governments manage to control all information, apparently controlling all correspondence & speech and manipulating shadows & stars, nor has any explanation been forthcoming as to how & why nearly 200 different countries have collaborated so faultlessly and completely for over 2 millenia, even through two world wars. As I said, they are invoked as bogeymen by people who are trying to dodge providing explanations.
The education you have received may only have been while is school; that does not mean school is the be all and end all of information. Most people have not been taught beyond school nor had any hand in increasing the information humans have; FE'ers rely on that to persuade you that schools are the only source of information (except, for reasons always unexplained, Youtube). While governments set the syllabus for state schools (and only schools), they do not determine who can know what generally. Many of us work in advancing knowledge which means hands on experimentation & verification, not sitting in classrooms.
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