Learn something

[Gen.OivanParticipant 88]

In case there are other men here that are looking to further their education without forklifting piles of cash check out http://ocw.mit.edu/index.htm , MIT offers their courses in a free self paced format for the independent learners and others just looking to further their studies; you may not get the sheep skin but I believe with some creativity, dedication and hard work you can kick ass and get your foot in the door. Another site that offers free on-line classes with professors from may different universities is https://www.edx.org/ you can audit classes for free as well as register for certificate eligible classes that are the same ones students are paying thousands for at universities, they have a JAVA app developer program that runs like 50$ per class for certs, otherwise it is free if you just want to take the class or don’t need the certs.

You can always create your own programs/apps and freelance work so who knows you might not even need the corps for a job.

[The Batman 2020Participant 2112]

Space Propulsion

But but…

Why rockets don’t work in a vacuum

I’ll check out the other courses though, thanks.

Your 20's are for learning, your 30's are for earning.

[The Batman 2020Participant 2112]

Judging by the courses I’ve looked at MIT is a total blue pill SJW indoctrination center. I thought they would be better than that, but I guess they have to tow the line.. I see that Lockheed Martin is a corporate donor. Makes sense.

Your 20's are for learning, your 30's are for earning.

[FunInTheSunParticipant 8283]

THANK YOU!

"I saw that there comes a point, in the defeat of any man of virtue, when his own consent is needed for evil to win-and that no manner of injury done to him by others can succeed if he chooses to withhold his consent. I saw that I could put an end to your outrages by pronouncing a single word in my mind. I pronounced it. The word was ‘No.’" (Atlas Shrugged)

[FrankOneParticipant 1417]

The Batman 2020 wrote:

Space Propulsion

But but…

Why rockets don’t work in a vacuum

I’ll check out the other courses though, thanks.

Empirical proof rockets work in a vacuum: Throw a bowling ball, or any weight, whilst on roller skates or a skateboard. You will move, in the opposing direction. Why? Conservation of momentum. Newton’s third law: For every action, there is an equal and opposite reaction. You will learn this in an introductory study of Physics, but is readily demonstrable in real life, on a macroscopic level–try it. Ambient air pressure has NOTHING to do with you moving when you throw the ball, other than exerting a negligible amount of drag once you start moving. Negligible compared to friction at your wheels, that is. These forces, are why you do not move forever but eventually stop, after you throw the bowling ball.

Now, you will not move as fast as you threw the ball, because you weigh more than the ball — m1v1 = m2v2. The gas ejected from the rocket has typically been oxidized, it is ejected at a HIGH velocity. So even though it doesn’t have much mass, it can produce a lot of thrust.

A rocket will actually develop MORE thrust in vacuum than it does under atmospheric pressure. The reason for that, is more complicated than the basic physics above — total thrust = mass flow rate x exit velocity + area of exit plane x pressure difference between engine and ambient surroundings. So as the pressure difference increases, the magnitude of the second term in this equation increases. These are some reasons why the flat earth theory is wrong.

[FrankOneParticipant 1417]

The Batman 2020 wrote:

But but…

Why rockets don’t work in a vacuum

I’ll check out the other courses though, thanks.

Empirical proof rockets work in a vacuum: Throw a bowling ball, or any weight, whilst on roller skates or a skateboard. You will move, in the opposing direction. Why? Conservation of momentum. Newton’s third law: For every action, there is an equal and opposite reaction. You will learn this in an introductory study of Physics, but is readily demonstrable in real life, on a macroscopic level–try it. Ambient air pressure has NOTHING to do with you moving when you throw the ball, other than exerting a negligible amount of drag once you start moving. Negligible compared to friction at your wheels, that is. These forces, are why you do not move forever but eventually stop, after you throw the bowling ball.

Now, you will not move as fast as you threw the ball, because you weigh more than the ball — m1v1 = m2v2. The gas ejected from the rocket has typically been oxidized, it is ejected at a HIGH velocity. So even though it doesn’t have much mass, it can produce a lot of thrust.

A rocket will actually develop MORE thrust in vacuum than it does under atmospheric pressure. The reason for that, is more complicated than the basic physics above — total thrust = mass flow rate x exit velocity + area of exit plane x pressure difference between engine and ambient surroundings. So as the pressure difference increases, the magnitude of the second term in this equation increases. These are some reasons why the flat earth theory is wrong.

[Jan SobieskiParticipant 28791]

Coursea.com is another and there are many more. I don’t pay. I just listen to the lectures. I enjoy learning for fun.

Love is just alimony waiting to happen. Visit mgtow.com.

[The Batman 2020Participant 2112]

@frankone

What if the universe doesn’t work anything like we think it does? What if we are just an infinitesimal part of a mega-pattern that has existed as long as time, doing nothing but propagating itself endlessly, playing host to countless smaller systems that all reflect their mother? What if all the fractal-like patterns we observe in nature (like snow flakes, mountain ranges, some clouds, our circulatory systems, that cool broccoli) exist because they are in fact little components of a mega-fractal? What if the quantum world behaves in a fractal-like manner (whatever that means) and that is where all of this comes from?

Your 20's are for learning, your 30's are for earning.

[MadmanParticipant 772]

posted in wrong spot…

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