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Mysterious Science Questions
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Court:), Founder- It's gametime. Are you ready?
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Nov 19, 2010 09:11PM
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Court:) wrote: "don't be dissapointed that's good"
so I've heard
so I've heard
Hannah wrote: "no HE WOULDN'T, HE COULDN'T, SO HE WOULDN'Tsorry, but you are making me mad... Courtney agrees with me, and my mom agrees with me"
Just because there isn't air in space doesn't mean there isn't molecules and atoms floating around and there is still matter, because everything is made a matter. Therefore when he pushed on the trigger the equal and opposite reaction would still happen to WALL-E.
there actually isn't matter in space, matter is solid liquid or gas, and there isn't any solid liquid or gas (other than the planets) so there is no matter. that's why they call it space
now there is this thing they call dark matter, but that's a totally different story
now there is this thing they call dark matter, but that's a totally different story
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Uh there is matter in space. There's molecules of different gases floating around. Have you even looked up the facts or are you just arguing to argue.
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Although the thing I'm not sure about is whether the fire extinguisher would even work properly in space because there would be a pressure difference that might effect the force of the expulsive. Most likely it would still work though because I think its the internal pressure that matters.
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There is matter spread all through the Universe, it is just spread very, very, very, very thin. The average density of gas in our Milky Way galaxy is about one atom per cubic centimeter. This is a much better vacuum than is obtained in a laboratory, but when integrated over the Galaxy, comes out to quite a lot of mass. This gas is mostly hydrogen (~90%), and helium (~9%), and less than one percent everything else. The gas between galaxies is even thinner, but there is probably something there (it hasn't been measured, though). These elements are in the Earth because they were present when the gas cloud that formed our solar system collapsed to form the Sun and the planets.That's from nasa. Are you going to argue with nasa?
Courtney wrote: "I'm taking physics, it seriously addelled my brain, I really wish we could take an alternate science course instead to physics"This is a reply to what you people were arguing about.
Okay, so.
The fire extinguisher would push the foam against the air, which would in turn push it forward because of the friction.
There is air inside the space ship, isn't there? So if he was in the space ship, the air inside would push him forward.
Outside the spaceship, there isn't any air, yes. Only a vacuum, pulling everything... Somewhere. But astronauts use a device if they get detached from their ship in space, it uses something (like a fire extinguisher) to push them back. Because of the lack of forces acting on them, their inertia carries them in that direction until a force does act on them, for example, the space ship getting in the way, and that's how they get back.
So, I think if the extinguisher was similar to that device (and I think it would work the same way) than it would be possible to move using that in space.
((I think. You can look It up if you want to be sure.))
No, I'm not going to argue with NASA, thank you. Here's another question I pose to you, if there is one atom per cubic centimeter then there is obviously a severe lack of air. So even if he could push himself with a fire extinguisher, wouldn't his acceleration be very... low?
Yes, I believe so. I'm not sure though. I would guess he'd be going slow, but he wouldn't be accelerating at all (acceleration is the change in velocity) he would probably reach a speed and stop accelerating at that speed, which... Would probably be pretty slow. Don't trust me, though. :D
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Pretty much, if you push something, it pushes back.For instance, you push a heavy box, but you can't move it.
The box's weight causes friction, which is a force that always acts in the opposite direction that the force is applied. That friction is the reaction force.
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Zoha, I understand the third law, I always have, I just don't entirely agree with it. And I would like to point out that my question wasn't "is there air in space". My question was "if there is nothing to push off of, can you move via fire extinguisher".
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Well, you don't move, but the pressure on your hand when you move it is that backward force. I don't think I agreed with it either for quite a while, but then it made sense...
And Zoha, give Hannah a break, I think she already knew all of these things, and wasn't asking What? but asking Why? which means she's really smart.Smart is wanting to understand. Smart is knowing how to learn. Knowing everything is not the same thing as being smart.
If she knew all of these things then why did she say there was no matter in space, and if she knew all these things she wouldn't be asking why because she would know why.
Hannah wrote: "Zoha, I understand the third law, I always have, I just don't entirely agree with it."How can you not entirely agree with a scientifically proven principle. Either it occurs or it doesn't, there isn't exceptions.
And just so everybody knows I'm not trying to sound mean it's just coming out that way because I can't relay emotions through the internet. Well I suppose I could always use emoticons :)But the point is I'm not trying to be mean I'm just debating.
Well, I think it's okay not to know something, as long as you learn it.And it's not really right to say that some things just are. Being curious about why they are is a great quality.
It helps in the future, the ability to ask questions.
I'm just saying that it is possible to know that something is but not know why it is what it is.
Asking that is smart. It's like... This is a triangle.
I know. But why is it a triangle?
It has three sides and three angles that sum to equal 180 degrees. The two legs sum to equal more than the base. And blah, blah, blah.
Now from asking that question, you can use the information elsewhere.
Like finding isosceles triangle mesurements, using triangle facts to help understand the big picture of a much more complex problem...
Why? is a hugely important question.
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Wow. You could look it up on the computer instead of asking..?
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Oh. Why's that? You don't have a computer?
Wait, you're on goodreads... Okay, I'm confused.
Zoha wrote: "Well now you know that there is something to push off. Gas. I even knew that. I knew it would work but not that slow. Hannah come on."
ok, there is something to push off. but this is a what if question, what if there was nothing? would it work? my knowledge says no, but if you can give me a reasonable suggestion as to why it could, then I might change my mind.
Skittles12393 wrote: "Hannah wrote: "Zoha, I understand the third law, I always have, I just don't entirely agree with it."
How can you not entirely agree with a scientifically proven principle. Either it occurs or it d..."
there are exceptions. science is mostly theory. Newton's third law is true, but there are other explanations for why things happen. my theories contradict Newton's is all.
ok, there is something to push off. but this is a what if question, what if there was nothing? would it work? my knowledge says no, but if you can give me a reasonable suggestion as to why it could, then I might change my mind.
Skittles12393 wrote: "Hannah wrote: "Zoha, I understand the third law, I always have, I just don't entirely agree with it."
How can you not entirely agree with a scientifically proven principle. Either it occurs or it d..."
there are exceptions. science is mostly theory. Newton's third law is true, but there are other explanations for why things happen. my theories contradict Newton's is all.
If there was nothing to push off of, no matter, no atoms, nothing... That no, because there would be no reaction farce, which is the friction of the action force, thus moving it....So, no. Based off of deductive reasoning.
What are your theories?
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ok, there is something to push off. but this is ..."
And Campbell
If there was no gas then no. If there is no gas there nothing to put force on to so then no. But the question I have is would the white thing inside the fire exthinger even come out?? I mean isn't it made out of certains gases and if you tried to bring it out it would just spread out through the univerise. No white color to come out. Right???
Well, the matter inside the thing would escape, and it would spread through the universe, but since there isn't any light, because there's no matter, and color comes from the light that is reflected or absorbed by the matter, then i don't think you'd see anything. Because if there's no matter, there's no sun, and therefore no light.And you can still go on the Internet to look.
You have to research.
There are sources that lie, yes, but sources that come from real scientists are not lies, and if you look at many different quality sources (by different, real scientists and professionals) and they agree, than it's not a lie.
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So I'm right it wouldn't really come out white. Okay just making sure. even though I didn't write that down you got what I mean. But even if the sun is not there to light it then there is the stars that let out light the darkness. But what if we planned to make our rockets go faster in space... would the fire show?? I think no and it wouldn't be that afitve even if it is that much force into it. My dad had a question. How do you turn in space. is there something in the spaceship that lets the rocket turn?? I mean I know there is something or maybe they launch in the direction they want to go. What would they use though if they had to move in space??
The stars are made of matter too, so they would also be gone.There is no fire, once they are through the atmosphere, then they rely on the rocket's inertia to bring them into orbit around the earth. Or to get to the moon.
I don't think they turn, actually. They are launched toward the international space station or the moon and they let the orbit carry them.
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Only to get out of the atmousphere, once they are in the earth's orbit, they can't use fuel. Even with the matter, they can only use their inertia, I think.But I'm not a rocket scientist, so you'd have to research it.
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It would take more advanced technology. Maybe they can turn, I don't know. But an airplane turns by angling it's wings, as do birds, to catch the wind correctly.There is no wind in space.
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My theories? Well, the problem I really have with the third law is the examples. I've been told that it is the reason that you move when you walk, the reason that rowboats go forward, the reason that you go up when you jump... etc.
I think that there are reasonable explanations for all of these that have nothing to do with equal and opposite forces.
For example, when you walk you supposedly would stay in place if the third law wasn't true. I don't think so. The reason you move forward is simply because you move your body by putting one foot in front of the other. The ground isn't pushing you forward. Your leg is rocking and dragging the rest of your body with it.
As for the rowboat, they say that when your oars push the water the water pushes back and moves you forward. First of all, its your oars that are pushing the water, not your boat. Second of all, water can't move that fast. It acts sort of as a wall if you push it too quickly, and since you can't move a wall, you move instead.
To me, jumping has more to do with the first law than the third one. After you bend down, you straighten your legs. Straightening your legs moves your body upwards, and, as we all know, an object in motion will remain in motion unless acted on by an unbalanced force. Of course a force does act on you, it's called gravity, but it doesn't act quick enough so you are airborne for a few seconds.
I still believe that the law is true, but I think it is more why why your feet hurt at the end of a long day, or why it hurts to punch a wall, I don't think it has anything to do with why things such as walking happens.
I think that there are reasonable explanations for all of these that have nothing to do with equal and opposite forces.
For example, when you walk you supposedly would stay in place if the third law wasn't true. I don't think so. The reason you move forward is simply because you move your body by putting one foot in front of the other. The ground isn't pushing you forward. Your leg is rocking and dragging the rest of your body with it.
As for the rowboat, they say that when your oars push the water the water pushes back and moves you forward. First of all, its your oars that are pushing the water, not your boat. Second of all, water can't move that fast. It acts sort of as a wall if you push it too quickly, and since you can't move a wall, you move instead.
To me, jumping has more to do with the first law than the third one. After you bend down, you straighten your legs. Straightening your legs moves your body upwards, and, as we all know, an object in motion will remain in motion unless acted on by an unbalanced force. Of course a force does act on you, it's called gravity, but it doesn't act quick enough so you are airborne for a few seconds.
I still believe that the law is true, but I think it is more why why your feet hurt at the end of a long day, or why it hurts to punch a wall, I don't think it has anything to do with why things such as walking happens.
