Recent content by mate0

yes, we are all traveling through time, including you. however it is impossible to travel backwards in time, we can only go forwards. You can go forwards more slowly than everyone else by changing your velocity to near the speed of light(so it appears that everyone else is aging faster than...

no, one of the things that was different before the big bang was that time did not progress in the same way we perceive it to now. so cause and effect before the big bang may not go the way we think of it

yes, it is. The universe did not come from nothing, it is just impossible to determine where it did come from because the current laws governing how our universe works weren't around then.

i think the original question has been answered, and now we are just repeating what has already been said. can a mod please lock this thread?

as far as i know there is only one meaning for the word nothing. no one knows what was around before the big bang, because the current laws of physics were created then, so it is impossible to determine what was before that. there are many different theories about what was here before the big...

yes, however this would not be useful in trying to accelerate a slowmoving object to near the speed of light, because you would need another body that is already traveling at around that speed.

gravitational slingshotting does not increase the speed at which an object is traveling, it just changes the direction. the only object that could conceivably accelerate an object up to relativistic speed would be a black hole (inside the event horizon), because the escape velocity here is...

first- I'm fairly sure this is the wrong place to post that question, ask a mod where to put it. second-it depends mostly on what type of volcano it is and how big the bomb is (we have anywhere from 10 kilotons to 200 megatons, so that's a very big range. the most likely result is that it...

actually in a handgun the majority of the gasses are vented forward, which does nothing to reduce recoil, there are no handguns in which the gases go anywhere but forwards. in some rifles gases are vented to the sides in what is called a flash guard, this is to keep the muzzle flash from...

no spectra bullets will not knock you over. when they said the .45 could knock over tribal warriors they just meant that it killed them very quickly. because of Newtons 3rd law if they person being shot is knocked back the person firing the gun will be sent back an equal distance.

yes, the gun will fire in space because gunpowder contains its own oxidizer, and yes it will still damage the target. If the bullet does not penetrate all the way through the target all of the momentum will be transferred, but this transfer will still damage tissues. the best comparison to...

all atoms have electric charges inside of them, this is what pulls the electrons toward the nucleus. I don't know why some elements can extend the magnetic field beyond each individual atom while others can't. yes that is how most magnets are made. the first magnets came from the earth, as...

infinity is just a concept, as long as you have the basic idea an exact definition is unnecessary, and probably impossible because it is used (misused?) so many different ways. in most cases the context it's used in will tell you the meaning.

would just like to clarify some terms, because it appears that I was not the only one mixing them up. here are some general definitions- heat: the exchange of energy between an object and its surroundings. temperature: the average amount of energy per unit an object has due to its atoms...

as far as i know there has never been the slightest indication of antigravity from a credible source.