Do rockets work in space?

On GLP? Imposible.

Is water wet. Is the sky blue. Is the pope Catholic. Is glp full of retards who think the earth is flat and rockets don't work.

There was such a thread, yeah.

And yeah, they work. It was in 5th grade physics for me.

From my experience, there are people that will argue with each and every of your statements here...

Last Edited by Tamonten on 08/04/2015 09:19 PM

Oh yeah, I remember now.

True enough.

I thought the pope was pagan?

They have you doing physics at 10 years old over there?

Plainly speaking, do an experiment yourself.
Stand on a skateboard with something heavy in your hands. Then throw the object - you'll roll to the opposite direction. That's the principle that work for all macroobjects regardless of vacuum, gravitation and other things. Only the magnitude of the effect is affected.

You have to start the brainwashing early

Not this sheet again. Checkout how a booster engine works. Simply put rocket exhaust has the rocket to push off on. It works like a bullet fired from a rifle.

Sorry that you have rejected common scientific principles. I guess that's why you started this asinine thread.

Well, at my times we started school at 7 and for quite complicated historical reason we did not have a 4th grade. So 5th grade was somewhere between 11 and 12.
We had only simple mechanics in 5th grade though. Only inertia and momentum - forces, gravitational pull and other more complicated things came few years later.

Last Edited by Tamonten on 08/04/2015 09:31 PM

What about when you shoot a blank? Same amount of gunpowder but very little recoil if any

Once upon a time we also got taught real science in junior and High School, nowadays they only indoctrinate new Libs and teach people how to pass their tests.

My how we have progressed.

Last Edited by Daggo on 08/04/2015 09:57 PM

His example wasn't about shooting a blank. A blank has no projectile.

In this case, the projectile is the rocket, and the back of the barrel is the exhaust that the thrust is pushing off of. Why are you bringing blanks into this?

If it'll somewhat soothe your concern, we have a degradation of education in Russia too.
When I was in school we still had classical 'Prussian' educational system. Now we moved to the 'Bologna' one and that's an utter disaster.

But smoke also shoots out of the barrel like exhaust shoots out of the rocket, so shouldn't there be a recoil? can you say that expanding gas moving from high pressure to low pressure is the same as throwing a projectile? Do I throw out carbon dioxide when I breathe out and thus it is pushing me back?

Are you being purposely obtuse? Do you understand what a metaphor is?

Go to a search engine of your choosing and type "how do rockets move in space".

Yes. But because relative weigth of you and of your breath is too huge, you hardly can feel it. The same with the exhaust of the gun.
There are two variable that influence it: masses of both objects (rocket and the exhaust) and the initial velocity of the exhaust. Because you can't bring too much mass to the space to just maneur, they are using different types of combustives to create huge initial velocity.

Last Edited by Tamonten on 08/04/2015 09:56 PM

And what about Free Expansion of Gas... doesn't that prove rockets don't work in vacuum space???

From what I know, Joule's "Free Expansion of Gas" says that free-expansion compresses the gas and is therefore "affected" by vacuum so it can't make the rocket move as the gas will have zero press/force.

Really its all about Newton's third law. It holds true in a vacuum. Only thing a vacuum means is theres no particles to put up a resistance so once you start moving you keep moving at the same speed without having to keep up thrust, unless a get close to a strong gravity object, which should theoretically increase you speed while it pulls you toward itself.

Read my explanation above. Only the initial speed of the exhaust counts into equation. It doesn't matter what happens to te gas after that. Just like it doesn't matter if the stone thrown by you while standing on the skateboard hits the wall or not. The momentum is defined the moment the objects separated.

No. There is no space, it's a NASA hoax.

My parents worked in one of the substructures of Energia during Soviet times.

Ok so when I breathe out of my nose into atmospheric pressure I feel no force pushing on my head. But when I plug my nose with two fingers so I have to breathe out harder and as soon as I let some air out of my nose I feel a force pushing on my head even though the amount of air leaving my nose was much less compared to when I was breathing out normally. Explain to me? My observations are consistent to the equation:
Work=-pressure(external system)*change in volume

So the change in volume is when my lungs compress when I breath out and the external pressure is atmospheric pressure ~101 kPa. This is when I breath normally.

The external pressure when I plug my nose is no longer atmosphere. The external pressure is now limited to my mouth, nose, ears which is at approximately atmospheric pressure because I have not breathed out yet. When I breath out the air reaches my mouth and nose and the external pressure increases more than atmospheric pressure as the air cannot escape my head. Thus my lungs have to work harder to push the air out and this force also pushes my head back.
Be sure not to pop you ears when performing this at home.

I bet they were welders?

Back in the 1921, when Robert Goddard was fathering rocketry, was said by the New York Times editorial; "That Professor Goddard with his 'chair' in Clark College and the countenancing of the Smithsonian Institution does not know the relation of action to reaction, and of the need to have something better than a vacuum against which to react--to say that would be absurd. Of course, he only seems to lack the knowledge ladled out daily in high schools."

You are beyond retarded. As I said before, you are being purposely obtuse.

So I'm retarded because you don't know the difference between gas expanding and a projectile being thrown. So when I build a camp fire the smoke is being thrown like a projectile? Or is it because when combustion reaction turns solid/liquid fuel into gas and gas take up more volume and thus the pressure increases in the vicinity of the fire and thus the gas has to move to low pressure?