thedarkshade

How do we know that spacetime is curved rather then simply light bending because of gravity?.

Spacetime is curved near massive objects, and when a photons moves near that massive object, it bends becuase the spactime is curved. The photon will still me travelling in a straight line, but that line is passing through curved space, which makes it look like it bends.

Well every theory has to be falsifiable.

In general we look for a new law in the following process: First we guess it. Then we compute the consequences of the guess and we see what it would imply and then we compare the computational results to nature' date=' or we say compare to experiment or experience. Compare it directly with observation to see if it works.

If it disagrees with experiment, its WRONG! In that simple statement is the key to science. It doesn't make a difference how beautiful you get it, it doesn't make a difference how smart you are who made the guess or what his name is. If it disagress with experiment, WRONG! That's all there is to it.[/quote'] That's all there is to it!

The minus sign derives from nromalizing the force between a proton and an electron

In english, please?

If you are willing to get off your high horse and start substantiating, follow the rules and stop degrading others, then please, stay.

Mooooooo:cool:. Competitive expell!

So, I finally get to my question: does any theory exist for which there is no way to formulate an opposing theory? (and I mean a reasonable opposing theory)

IMO thats not compatible with scientific method.

i do believe, the equation is related to the radius of the energy equation i am willing to derive.

Yeah!

I could also derive Bohr's energy equation for the orbiting of electrons around the nuclei of atoms, if you wish...?

There is one thing I don't undersand though. Where does the minus come from when doing the derivation?

PhD?

That was the model which suggested that electrons were like little moons orbiting tiny planets.

And the condition (IIRC) is that [math]m_ev_er=\frac{h}{2\pi}[/math].

granpa, gravity is always attractive, always!

 

A positron and an electron as an example are strongly attracted to each other.

But that is not due to gravitational 'non-repulsion'. Even if they gravitationaly repelled, the attractive electrostaic force would win over repulsive gravitational force.

I have read a definition that energy is the capacity to do work, but even that seems a bit random, where does it come from, how does it happen?

We know from thermodynamics that energy cannot be created or destroyed, it only can pass from one form to another. What this actually means is that all the energy that is today in the universe, is exactly the same amount of energy that was in the very very beggining of the universe, so the very origin of energy is Big Bang itself.

 

Now if you want to take it to a more practical matter, as where do we take the energy using which we can perform our daily activities, then the answer would be through food. Food provides us all the energy we need, and that energy is released through a series of physiological processes called metabolism.

I assume there a simple answer to this:

[math]Q=mg[/math]

[math]m=\frac{Q}{g}[/math]

A decrease in gravitational acceleration means an increase in the mass (as long as we have Q constant which is our case), so I guess its worth more on Moon!

Haio Fellas:)! Long time no see!

I see things have gone pretty forward here.

 

Glad to be back!

Except its use as a method of cooking, it's also used to reduce food toxins.

This is just the right place New Science. I'm sure you'll find a lot of debaters here about things which concern you.

 

Cheers!

Well there are lots of IQ tests out there which are formed based on different criteria and one has to ask "what kind of IQ are you talking about?". I've done IQ's that are 15 pages long but I've also done IQ's which actually contain no more than 30 questions. And the difficulty level of the questions differs dramatically. Where I come from, there is no standardized IQ test, and until IQ is not standardized then one cannot say anything ,at least evidence based, whether the average IQ is increasing or decreasing.

There is just too much hatred and greed among mankind, and I'm afraid there's really little chance for mankind to come together and seriously try to make improvements whose result would have a world-wide effect. I assume that it's only science and scientists among which there are no signs of discrimination on any basis. But scientists aren't really the big guys who are in charge of everything.

This year I played COD4 Modern Warfare and I tell you it's quite a good game. The graphics are really good but the thing I don't really like about it the the fact that you're somehow told how to do everything. There is no room for creativity at all. Comparing Crysis with COD4, I say that in Crysis you have a lot of options, you can pick any way you like and on the other side COD4 really reduces your options.

Then Ghost Reckon: Advanced Warfighter 2 was really good too. It's a tactical game and the graphics rock too. But the game I think is just the best at this moment is Rainbow Six Vegas II. It simply rock! A combination of tactics, stealth and team work followed by some real real good graphics makes the game just be awesome.

 

I heard that Rainbow Six is bringing out Hawks soon, and they say it'll be quite a good one!

There are lots of experiments you can do with electricity in which you will have no great danger. I would suggest trying them instead!

Except the difference in the addition of velocities, measuring relative kinetic energy differs from the classical formula for kinetic energy.

I was wondering where we could get free software for Anatomy if anyone knows please let me know

Well you can't really download it, but you can use it online. It's quite simple basically!

http://www.bbc.co.uk/science/humanbody/

Just look under "The Body".

 

Hope this helpz,

Shade!

What's on the other side?

 

Just make sure you won't miss anything on this side!

A year from whose reference frame?

Traveler's frame of reference. It his his clock that is moving 7 times slower then ours here on Earth.

Yes, the period is indeed independent from the mass. It only varies from the length (directly) and gravitational attraction (indirectly), as Kyrisch's formula points out.

 

You have have a clear picture of the pendulum, then I'll just move on to derivation"

 

[math]F=mg\frac{x}{l}[/math] where x=elongation

 

we know that F=ma, so:

 

[math]ma=mg\frac{x}{l}[/math] so the masses cancel and then we're left with

 

[math]a=mg\frac{x}{l}[/math] and as [math]a=\omega^2 x [/math] then:

 

[math]\omega^2 x = g\frac{x}{l}[/math] again we cancel x on both sides and now you clearly see that we finally get

 

[math]T=2\pi \sqrt{\frac{l}{g}}[/math]

 

I hope this helpz,

Shade!

I think Andromeda and the Milky Way are in fact on a collision course. Is this explained by gravitational attraction between the two?

Galaxies are moving away from each other. Everything is just moving away from everything. Our current model says that our universe appears to be infinite, and there's enough room at infinity for everything to move away from everything. And if this is happening, how would Andromeda possibly collide with Milky Way?!