Recent content by mooneyes

It is indeed!

Ah, I see, so E2 - (Pc)2 = constant for any inertial frame, but the energy and momentum can be different!

I am a little unsure about something, take this example for instance: In a supernova event, a star ejects X amount of mass at a relativistic speed, say 0.5c. What's the total energy of this outflow in the reference frame in which the star's at rest. Now would I be correct to assume that...

Ah ha! The entropy doesn't increase, I see. Thanks!

Hi, this concerns thermodymanics. A block of volume V is reversibly compressed from pressure P1 to pressure P2 isothermally at temperature T. It goes on to ask about the heat expelled, but that's not my question. It is a solid, obviously not an ideal gas, so I'm sure the internal energy...

Homework Statement Derive the equations for the velocity and acceleration vectors of a particle in polar coordinates. 2. The attempt at a solution r = xi + yj where x = rCos\Theta, y = rSin\Theta r = r(Cos\Thetai + Sin\Thetaj) v = \frac{d}{dt}r v = \frac{d}{dt}[r(Cos\Thetai +...

Well I'm glad you do care! Yes, I see, seems to be more trigonometry work than anything else, thanks.

1. Taking the latitude of Dublin as 53.3 degrees North, and the tilt of the Earth's axis and the lunar orbit to be 23.5 and 5 degrees respectively, what is the maximum altitude of the Moon as seen from Dublin? What is the maximum altitude as seen from the North pole? 2. Homework Equations...

Okay. I've read this entire thread from start to finish, and maybe its just because I don't know that much relativity, but I get what yer man is saying, who posted the original question. Can someone just answer me this, in layman's terms. If I was traveling at 99.999% the speed of light time...

i really don't like the maths behind it, all maths is is our way of getting to grips with it, the real physics is in the phenomenom in question.

Hi, just wondering does anyone know anything about these? For those who don't know, they're drugs (legal, they come under the category of "suppliements") that are supposed to improve cognitive power, such as memory and such. I'm just a little skeptical about it?