Science/Astronomy Questions.Â* Â* Â* Â* Â*?

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Chopin

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Science/Astronomy Questions.Â* Â* Â* Â* Â*?

Does Light weigh?
Does matter weigh(XD)?
Does thought weigh?
If I had a tiny particle, 5 light years away from it there was a little planet, would it pull it in with the gravity?
How does gravity work??
And do you believe in other living beings outside of Earth?
 
i don't know why people say light has no weight when it can be argued that it does....

Yes not we know they say light has no mass....BUT then if light has no mass how is a black hole able to capture on its gravitational pull??

1) yes
2) duh
3) as mentioned...just few electrons since it involves electrical charges in your brain.
 
1. Photons are massless particles
2. Matter has mass, yes
3. Thoughts are created via neurons firing, and this needs energy. We know e=mc^2 that mass and energy are equivalent
4. If it was the only object, yes. Even the Earth's gravity effects objects across the universe, it is just that it is essentially zero
5. Gravity is an attractive force. Every object in space exerts a gravitational pull on every other, and so gravity influences the paths taken by everything traveling through space. It is the glue that holds together entire galaxies. It keeps planets in orbit. It makes it possible to use human-made satellites and to go to and return from the Moon. It makes planets habitable by trapping gasses and liquids in an atmosphere. It can also cause life-destroying asteroids to crash into planets
6. Yes, there is most definitely other life in the universe. Of course, it would look like nothing we are used to
 
Weight is a measure of mass based on gravity, I think you mean to ask if any of those things have mass.

1) Yes
2) Yes
3) No, the physical functions that cause it do, but thoughts themselves, no
4) Yes but closer objects would have a much stronger pull
5) Matter causes a flux in space-time. We call this flux gravity, there is actually no "pull" it is simply that by not moving a object will become closer to another object because of the bend in space.
6) Living, yes, intelligent (language speaking) no.
 
i don't care about the 1rst 4 things ...so gravity pulls and aliens exist and have been here and are still studying us and want to communicate with us.
 
1. Light has no rest mass.
2. Yes.
3. Well, thought is transmitted by electrical impulses in your brain, so it weighs as much as a few electrons. So very little.
4. Eventually yes, but gravity decreases as the square of the distance between the objects.
5. We know how it works in that we can predict what will happen, but we don't know yet if it's best described as a property of spacetime or as a force with a missing particle (the hypothetical graviton).
6. I think there's definitely life out there somewhere, but it's not visiting us.
 
1. Light has no rest mass.
2. Yes.
3. Well, thought is transmitted by electrical impulses in your brain, so it weighs as much as a few electrons. So very little.
4. Eventually yes, but gravity decreases as the square of the distance between the objects.
5. We know how it works in that we can predict what will happen, but we don't know yet if it's best described as a property of spacetime or as a force with a missing particle (the hypothetical graviton).
6. I think there's definitely life out there somewhere, but it's not visiting us.
 
I'll tackle the last two:

Gravity is the manifestation of matter conflicting with continuously expanding time and space in the universe, and this phenomenon expresses itself as acceleration.

Of course there is life elsewhere in the universe; it's a really big place and I don't believe the Earth is so unique or special! Europa may be a good candidate for simple undersea lifeforms right here in our own Solar System. There is one major problem confronting us in the search for life elsewhere though, and that is huge distances. If there are, say, 10,000 advanced civilizations in our own Milky Way Galaxy, they would have an average separation of about 400 light years -- a daunting distance for any kind of communication.
 
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