# Nacelunk

Senior Members

80

1. ## What came to be first - time and laws of nature or Big Bang?

Based on the theory of Big Bang, there once was singularity and because of it's incredibly large density it exploded creating our Universe. Should we consider that the start of the World and all its laws of nature or did they exist before Big Bang? I think so, because if there were no laws and time, nothing would exist in our understanding. But if time and the laws of nature existed before BigBang, then it would have to follow them. It would need space in order to expand, and a reason for it. (the reason why it expanded is because of laws of nature). So what was that staff around the singular point? Ordinary vacuum? Dark matter?
2. ## Popular programming languages

I agree with those who said java is a good language to start. For example I just started learning java just few weeks ago at school. Good thing is that even with basic knowledge (boolean logic and "if" statements) you already can do a lot. For example right now I am making a text RPG game, which is pretty much like any real videogame, just without graphics and not as long. Next semester I will learn C++
3. ## Need help solving unequality

Hi, first of all I am in grade 11 math so probably for you it will seem kinda easy unlike for me (well, when you know how to solve something it's always easy). Here. This is the most I could simplify it to. Solve for x: 5x^3+6x^2+2x > 9. And please show the steps.
4. ## What if we move apart?

Say two spaceships are moving apart, both at 0.9c (relative to stationary observer) Wouldn't they observe movement faster than c? Because in realative velocities addition formula there are no "squares", therefore negative velocities do matter. So I believe the velocity of one ship relative to the other would be roughly 1.8c. (Of course I don't really believe it because nothing can travel faster than light, I would just like to know where I am wrong)
5. ## Relative to what do you measure c?

Suppose you travel at 0.9999999c in a spaceship and you turn on a flashlight forwards. As far as I know speeda light is always constant 3*10e8. So it will fly out at that speed. But relative to what - the spaceship or our inertial frame of reference (outside the ship)? And i have another, a little off topic question. When you fly at speed close to speeda light, you notice that outside observer's (at rest) clock is running slow. The outside observer also notices your clock running slow, right? I don't really get that. Sorry, for offtopic again but don't wanna create three different threads: concerning equation E=mc*2. I don't get why speed of light affects amount of energy matter has. I don't see the relation at all. If c was 2 times greater, would the amount energy, therefore, increase by 4 times? If so, why?
6. ## The faster you are trying go the slower you actually move?

Hmm, I yet have no idea about what you are all talking about because I haven't even yet studied Special Relativity in school (I will in January) Not considering General Relativity. By the way, when and at what course do you study it?
7. ## The faster you are trying go the slower you actually move?

OK, one more question - if we could possibly reach the speed of light it would basically be time travel to the future, right?
8. ## The faster you are trying go the slower you actually move?

If we were to fly 300000000 m at 0.5c, how much time would be gone according to us and outside observers? Would it be the same? If not, then the speed would also be realative, wouldn't it?
9. ## The faster you are trying go the slower you actually move?

I don't get this - when you move very fast (say 0.5c) the time slows down relative to outside of your ship. If you looked at the planets around you, it would seem like they spin faster than before. But if they look at you, it would seem like you move slower than you were supposed to (0.5c). Also, you spent certain amount of energy to accelerate to 0.5c but you actually move slower. Where does the unused energy go?
10. ## Weird things happen at speeds close to c...

I thought it's vice versa. So you mean that if you move at 0.999 c for one minute and then stop, the clock outside the ship would show something less then a minute? What about twin paradox? It describes that that twin who flew at lightspeed didn't age as fast as his brother from the planet, meaning that the first twin went to the future. Am I right? If so then what you said is supposed to be backwards. Isn't it?
11. ## Weird things happen at speeds close to c...

So I thought about something recently.When you move (in a super-fast spaceship) at speed close to c (say 285000 km/s) the time is slowing down relative to ouside the ship. So which means that while you are sitting there for a minute, there is actually, say, 20 hours gone outside the ship. So if you look at it and measure the distance that the ship travelled in 1 second, it wouldn't be 285000 km. It would be much less. So the paradox is - the faster you are trying to move, the slower you are actually moving. Am I right? If yes, how can it be?? It doesn't make any sense! Also I have some other questions - what is the fastest possible speed we can really reach (on a spaceship)? And also isn't that time traveling? And also where does the mass come from when you reach light speed? It can't just appear from nowhere! And finally - why does the time slow down (or speed up, depending on your point of reference)? One more thing - suppose you travel in a space ship at 290000 km/s and you throw or launch something at speed of, say, 50000 km/s. Theoretically the speed would add up to 340000 km/s. What would happen in that case?
12. ## How is pi calculated on computers?

So, that's the question.
13. ## Is there a minimal measurement of time?

OK, then. A little off-topic - how about length measurement? Is there anything smaller than electrons, protons and neutrons?
14. ## Is there a minimal measurement of time?

But I mean - really, physically.
15. ## Is there a minimal measurement of time?

Is there a minimal "portion" of time? Or the time can be "divided" on infinite number of parts?
16. ## To go to University or not to go?

You mean - school courses? I am actually going to go to a semestered school next year and will probably be able to take 2 math/science courses per year
17. ## To go to University or not to go?

What if I studied ESL half a year in grade 9, and then - three years of English?
18. ## To go to University or not to go?

A question about the student loan - what are the requrements to get it? My teacher said that if your parents make very much money, you are not going to get a loan but she didn't say how much it is. PS Anyway, my parents don't make too much money, but just to know...
19. ## What's happening to me? Often yawn and hard to breathe!

You know what - I think I also have these symptomes... I use some kind of aerosol and it helps me
20. ## How many Universes do we have?

You mean it always existed?
21. ## To go to University or not to go?

Where else do you think I can get a job? I don't even have a car Also I have a question - how much time do I spend in University everyday? How much homework do I get?
22. ## To go to University or not to go?

How many years do I study to get the PhD? As for loans I can't expect my parents to give me money for Univ. What should I do, so that i could get the loan? (have credit history?) I am thinking about getting summer job this year - I think I am gonna go to MacDonalds. I have some problems with my parents and they are not gonna do for me anything after I get 18 so I will have get an apartment. Do you know if it's expensive to get an apartment close to Univ? (or in it?) As for learning - I think the biggest problem for me know is English but I think I will speak this language well in 2-3 years
23. ## How many Universes do we have?

To Klaynos My main question was - Are you agree with me that universe appeared from nothing and with no reason?
24. ## How many Universes do we have?

I think my thoughts can change only amount of information in my brain
25. ## How many Universes do we have?

Do you know how many information our universe contains?
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