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Satellites Do Not Exist

Ah, but if you were up there doing a spacewalk and were equipped with a directional anal nozzle, couldn't you fart your way around the place?

The pressure from the air within the space-suit would make the additional impetus from the farts irrelevant.

But maybe they could try that for moving around inside the ISS?
(An upgrade to the air filtration system might be needed first.)
 
It has always made me wonder how these idiots who think that rockets won't work in space because there is no air to push against, can reconcile that with supersonic missiles, that obviously do exist.

If rocket motors required air to push against, then the reactive force would diminish as the rocket got faster because there would be less air pressure, since the rocket is travelling away from the air it is supposedly pushing on. Once the rocket got to mach 1, there would be nothing left to push against, so mach 1 would be the speed limit, and no additional thrust could make it go faster.

Yeah, I mean how the hell could someone who doesn't understand 'equal and opposite reaction' not see THAT? :confused:
 
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Yeah, I mean how the hell could someone who doesn't understand 'equal and opposite reaction' not see THAT? :confused:

Well, yes, but not quite.

Lets do a thought experiment; grant for a moment, a world where rocket propulsion requires air to "push" against; what would this look like in terms of a Law of Physics?

It would mean that the air would have to be pushing back against the thrust in order to propel the rocket along. This would give air the properties of both a solid as well as a gas simultaneously, a state that has never been observed before. As the rocket travels faster and faster, the air has a faster and faster retreating object to push against. The rocket itself is travelling through the very same air so there would be pressure pushing back on the rocket against its direction of travel. Ultimately, this would lead to a "speed of equilibrium", a speed at which the rocket could not push through the air because the air it is retreating from can have no further effect to counter the thrust and therefore no longer accelerate the rocket, no matter how much additional thrust is applied.

To summarise, if air had a property such that it needed to be "pushed against" in order for thrust to result in movement, then that very property would also be working against movement of the rocket. While air does cause the aerodynamic property called "drag" this is nowhere near as strong as it would need to be (by several orders of magnitude) to be responsible for rocket motion as a result of "pushing against air".
 
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Yeah, I mean how the hell could someone who doesn't understand 'equal and opposite reaction' not see THAT? :confused:

Ya'll done got that whole dang thing wrong! Sure, it's "equal and opposite reaction", but the rocket exhaust pushes on the air and the air pushes back! Ya gotta pay attention in 'rithmatic class.
 
:jaw-dropp

There are plenty of people hating quantum mechanics.

There are quite a few who doesn't understand thermodynamics.

But the rejection of Newtonian mechanics, that was a new one for me!

I had an exchange with a guy on YouTube about that. His Google+ profile mentioned that he was attending a community college in South Carolina, so I looked up the names and office numbers of the math and science department chairs and provided them to him, inviting him to go ask them whether they agreed with him or me. I said that if they agreed with him, and they didn't mind an e-mail, I'd then contact them so they could explain my error to me. His immediate response was, "l wouldn't believe it if God himself told me!". I've found his attitude to be pretty representative of the conspiracy theorist crowd.
 
I went out and watched the non-existent ISS go over last night. As always, it was pretty awesome. Venus and Jupiter were pretty too.

I didn't catch the ISS (so I have no reason to believe it exits) but I did catch Venus and Jupiter. Where I live at 8400 feet above sea level, it was so clear I could see the spheres they are attachted to. :D
 
Finally got around to watching the rest of the Satellites Do Not Exist video.

In the part I'd already watched before I posted it he was talking about how the temperatures in the thermosphere are equivalent to a blast furnace, and there's no way satellites could survive the heat.

I'd already figured out the solution to that while watching the video. The atmosphere at LEO is virtually nothing, it's a vacuum, so it'd have an incredibly low thermal conductivity. The rate of heat being absorbed from bumping into the occasional gas atom would be far less than the rate of heat being radiated away, so the satellites wouldn't heat up.

It turns out he wasn't ignorant of this explanation, about half way through the video he quotes some source which gives basically the same explanation, which also mentions that a regular thermostat would read a temperature far below zero.

But he completely fails to understand the explanation, and thinks it's a contradiction that the temperature of the gas at that altitude would be as hot as a blast furnace, and yet the effective temperature would be below zero because it's a vacuum.

He goes on for a bit demanding to know how, if that were true, it would be possible for us to feel the heat of the sun. He doesn't seem to understand the difference between heat transfer by direct contact and heat transfer by radiation.

What really blew my mind was his claim that rockets can't possibly work because there'd be nothing for the rockets to push against in space. Well, at least he understands that "every action has an equal and opposite reaction", but apparently the concept of "reaction mass" is alien to him.

According to him, GPS is actually done by phone towers triangulating your position, and satellite dishes are a scam, and are actually picking up the same broadcast TV signals your regular antenna can pick up. Oh, and satellite phones are just regular phones with a bigger antenna, allowing them to connect to distant phone towers that are too far away for regular phones to reach.

He goes on for a bit about how the internet and phone communications are done by fibre-optic cable, not by satellites, as if that were somehow relevant. He doesn't seem to realize that a single strand of optical fibre would have a far greater bandwidth than an entire satellite, and that laying a cable containing hundreds of strands of optic fibre across long distances is a far more cost-effective way of transmitting vast quantities of information than by satellite.

He has heard that satellites are visible to the naked eye, and he counters this by showing a brief video clip of the sky, and demands to know where the satellites are, saying that all he can see are stars and planets.

But I noticed that in the brief clip of the sky he shows, one of the "stars" is moving pretty fast relative to the other stars, and is almost certainly a satellite.

Not that he'd accept it as a satellite even if we pointed it out to him, because he also talks about how a satellite the size of a bus would be too small to see from a distance of over 90 miles away. He doesn't seem to realize that it'd also be shining brilliantly due to reflecting the light of the sun, and would look a lot like a star or a planet to the naked eye.

I think I'm going to need some time to rest and recover before I watch the one about the ISS being a hoax.



Oh, I'm pretty sure he's completely serious.

Yeah, as soon as he started yammering on about the temperatures in the atmosphere and comparing it to "a blast furnace," my immediate response was: "Atmosphere pressure, dude! Atmospheric pressure!"

A blast furnace is extremely pressurized. Which is why it can melt metals as effectively as it does. The higher you go into the atmosphere, the less pressure there is. That's why simple cooking instructions for boiling stuff is written differently if you are a mile up in the Rockie Mountains, compared to if you were sitting down low in the plains or along the coast. It requires lower temperatures down lower in order to get water to boil, than it does up on the peak of the Himalayas.

I am by no means a scientist, but....GAH! This is something an average American 9th grade student could very easily explain. (Younger average students in other countries could explain it as well.)

I stopped watching after 3 minutes.
 
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....It requires lower temperatures down lower in order to get water to boil, than it does up on the peak of the Himalayas.
Water boils at lower temperatures at higher altitudes. Cooks use pressure cookers to cook food faster with higher pressures/temperatures.

Ranb
 
Water boils at lower temperatures at higher altitudes. Cooks use pressure cookers to cook food faster with higher pressures/temperatures.

Ranb

At first, I was wondering what in the hell you were talking about. I thought I did says that it boils at lower temperatures at higher altitudes. I looked back at my post, and lo and behold, I typed it wrong. My bad. :o
 
What's truly appalling is that the thumbs up and thumbs down are evenly split ... instead of it being a slam-dunk thumbs down! Of course, maybe some of them thought it was a joke and had a good laugh and thumbed it up for that reason. One can only hope...
 

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