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Quote from: Bored chemist on 09/12/2017 22:06:16Since he doesn't understand the difference between mass and force, I suspect that trying to do thermodynamics isn't going to go well.Yes I do, what you don't understand is that mass is an ambiguity of weight.
Since he doesn't understand the difference between mass and force, I suspect that trying to do thermodynamics isn't going to go well.
Quote from: Thebox on 11/12/2017 08:05:56Quote from: Bored chemist on 09/12/2017 22:06:16Since he doesn't understand the difference between mass and force, I suspect that trying to do thermodynamics isn't going to go well.Yes I do, what you don't understand is that mass is an ambiguity of weight. There is nothing ambiguous about either.It would be better if you learned what was real, rather tan making up stuff that wasn't.
Geostationary orbit... What stops the object falling to the ground?
The objects mass on a set of scales is due to the force.
The force imposed on a set of scales by an object is due to the objects mass.
Might also help to read up on density before invoking quantum anything. Seems to be the standard technique of the woo monger and those who have no understanding of science to stick 'quantum' into a sentence to try and make it sound sciencey.
as the (ISS) enters the atmosphere because of slowed velocity due to slight drag, it encounters resistance in the air, and decelerates, hopefully to terminal velocity, before it breaks apart.
Helium does not have a registerable mass on 5he scales on earth, it floats up and out of the earth, yet its got mass
After 500 years really Galleileo ows the church an apology for stating both metal balls fell at the same rate.
Quote from: Petrochemicalsas the (ISS) enters the atmosphere because of slowed velocity due to slight drag, it encounters resistance in the air, and decelerates, hopefully to terminal velocity, before it breaks apart.I'm afraid that terminal velocity in the upper atmosphere is very high, because the air is so thin.- Then the satellite, travelling at several kilometers per second turns into a fireball. - Only a heatshield will protect it, and the ISS doesn't have a heatshield. - Fortunately, the Soyuz return capsule has a heatshield; in case of an emergency, the astronauts get into the Soyuz, undock, and safely reenter Earth's atmosphere, while the ISS burns up in the upper atmosphere. - Hopefully, no pieces of the ISS hit populated areas. Parts of the earlier Spacelab landed in the remote Western Australian desert.The ISS is designed to be as light as possible - the solar panels are designed to be unfolded in free fall, and are only strong enough to withstand the gentle push moving the ISS into a higher orbit. So the solar panels, with their large area and light construction are likely to break off first. QuoteHelium does not have a registerable mass on 5he scales on earth, it floats up and out of the earth, yet its got massAccurate mass measurement is best done in a vacuum. In a vacuum, Helium would have a registerable mass.Another method is to take a helium tank, and weight it when it contains compressed gas, and again when it contains a vacuum.A less accurate way is to place a weight on kitchen scales (say 100g). - Then take a "floating" helium balloon, and measure its volume- sticky-tape the balloon's string to the weight. The weight will now weigh less than 100g. Record the new weight (a).- puncture the balloon, and lay it on the weight. It will now weigh more than 100g (b)Take the (negative) weight of the helium = (a) - (b), and add the weight of the air displaced by the balloon (when inflated).This will give you the mass of the helium in the balloon.
Helium does not have a regiserable mass on 5he scales on earth, it floats up and out of the earth, yet its got mass.
- A mass sitting stationary on scales is not accelerating, so the scales must oppose the acceleration by exerting an upwards force on the mass that equals the downwards force of gravity.
It does not push back it simply has an opposing density.
Quote from: Thebox on 14/12/2017 11:44:29It does not push back it simply has an opposing density. Imagine a simple spring balance- just a spring, sat on a stable base like a table and with a pan on top of the spring.You put a rock on the pan and it pushes down.It moves the pan down a bit and the extent to which the pan moves depends on the weight of the rock.The important fact to notice is that the spring is compressed a bit.And that compressed spring really does push back on the rock- whether you like it or not.So you are, as usual, wrong.Why not learn some science rather than posting reams of nonsense?
It ''pushes'' back but it does not push back.
because the scales has solidity. It does not push back it simply has an opposing density. ...dense enough...When the spring compresses the spring increases in ''density''
To push your scales into an hole , I assure you the scales will continue to accelerate.
A mass at rest is still under the force of acceleration of g but simply not moving because the scales has solidity. It does not push back it simply has an opposing density.