Recent content by MichaelW24

Thanks for your help, but I have already gotten used to it. I was just asking how it works, not checking that it does.

Can anyone explain why I get a beeping noise on my speakers when I am about to get a phone call on my mobile phone? Just something that I've become used to, but I realized I don't actually have a clue how it works, and am quite interested. Thanks for any help! Michael

well I'm not too good at this stuff yet, but that seems to say basically: "well now we can break the time barrier... blah blah blah some special relativity... blah blah... so there you have it, the time barrier" He seems to have proven himself wrong...?

I would have thought there is no such this as an unaccelerated frame simply due to the existence of mass in the universe.

How do you tie the ribbon?

y = x^(x/8), ln y = x/8 ln x (1/y)(dy/dx) = (x/8)(1/x) + (1/8)ln x (dy/dx) = y(1/8 + (1/8)ln x) dy/dx = (1/8 + (1/8)ln x)x^(x/8) Im not sure if this is allowed. Certainly the power rule isn't allowed (eg. to say d/dx x^x = x*x^(x-1)) because the power is a function of x. But I am not...

I was just sort of debating this in another thread. If an object travels at two relative speeds in your frame, v and then later u, for v>u, you will observe it's momentum to be equal to gamma*m*v, where m is the mass of the object in its own frame. This added gamma factor allows momentum to...

Ok, this extra inertial mass should be (gamma - 1)m I think... do you know if this contributes to gravity? Its quite confusing as I was given a hint that the m in F=ma isn't nessecarily the same as the m in, for example, W = mg describing a body's weight.

But surely the mass isn't increasing, gamma is increasing which allows the momentum to steadily rise with a constant force; the mass "m" which is used in all equations always refers to the rest mass. Unless you define another kind of mass as "gamma*m" it may get quite confusing when you say the...

Still not following... Visible light does travel at c, all electromagnetic waves do, and all phtons have no rest mass. I would say trying to introduce the concept of different wavelengths moving at different overall speeds through certain mediums is very confusing when trying to explain...

I would say the mass does not increase, as the value of "m" in equations does not increase. For example the poster above said "if a particle of mass m is moving toward you with this velocity its total energy is 10 mc^2", which is true but clearly m still stands for the rest mass, which does not...

I've never heard anything like that. I don't want to say it's wrong because he is a teacher, but I'll say that it contradicts everything I've been taught upto this point. As I understand it, all em waves travel at c in all inertial frames. What does the fact that gamma rays can travel through...

all you have to remember is the two postulates, and derive everything from them: 1: it is not possible to determine your velocity.. this is the same as "it is not possible to determing your velocity to a SPECIAL inertial frame". If you're in a plane, then you automatically assume your...

I thought the universe was estimated to be around 150 billion light years in diameter, which, when you remember that it is only abount 13.7 billion years old, would suggest it has expanded pretty fast. Also I remember hearing that the limit on the velocity was restricted to particles and...

cool.. do you mean a plane perpendicular to its direction? So only other photons would be outside the plane. Would the plane also appear frozen? What about when the photon moves? Does it keep its view of the plane so that the point of the photon lies on the plane all the time? Or does it see...