Recent content by PiTHON

You said, "Above that it breaks down because the lifters generally get fatter without getting much more muscular."; do you have a source on that?

Anything strong enough to tear a planet in two will most likely destroy life. The volcanic activity alone would destroy most everything, and the amount of ash thrown into the atmosphere would block out the sun for years. I've read if the Earth's tilt was a few degrees off in either direction...

As ehild said, people did/do experiments with moving charges and they can detect a magnetic field, once the charges stop moving the magnetic field disappears (in their frame). These same people can create formulas that explain the experiments nicely, but they probably can't tell you "why" it...

Would the answer be "because there is a changing electric field"?

What is the correct answer for time 1? I think your calculations are correct. The pi's come in because they satisfy the equation: y(x, t) = A cos (wt + kx) 0.002m = 0.002m cos ((1508 rad/s)(t) + (157 rad/m)(0.03m)) 1 = cos ((1508 rad/s)(t) + (157 rad/m)(0.03m)) arccos(1) = (1508...

You seem to be thinking of deceleration as an operator on the acceleration vector, it isn't. It is just a relationship between velocity and acceleration. An object whose velocity vector is pointing in one direction and is undergoing a net acceleration in the opposite direction is said to be...

What are s and d in your equations? The picture shows s = (1/2)at^2, where did your d come from and what happened to time? Try solving for acceleration using their symbols first, then figure out your unknowns. Also, I think the picture should say, "Then I would calculate the time that the...

I agree that the existence of such a special place in the universe means little to zero in terms of solving current cosmological problems. I just want to make sure I have a fairly correct grasp on the basic concepts of what a simple universe could/may look like. I guess the problem came up...

I too have been trying to visualize what the universe "looks like", and I think this thread might have cleared some things up for me. I have a few questions to try and confirm my theories though. 1) The universe was completely opaque until ~380,000 years after the BB, at which time, nearly...

From http://www.einsteinathome.org/about/screensaver.html : "Pulsars and Supernovae Remnants Pulsars and Supernovae are shown on the sky because scientists believe they emit gravitational waves. The purple dots on the celestial sphere mark the locations of pulsars* that have already been...

Right, and the entire observable universe was the size of a quarter at one time. The way I'm understanding what your saying is every cubic inch of the universe created CMB photons during the recombination event. The photons we received in the past were born closer to the earth, and the ones we...

So how many years from now will the wavelength of the incoming CMBR be longer than the longest wavelength of light we can currently detect? Also bapowell said "Today, we are getting CMB photons that were emitted from far away in the universe." When will we receive the last photons from the...

Oh, I'm sure I'm ignorant of the relevant math/physics, I just learned the cross product about a week ago and was excited to see its use. I would think the general normal vector and the incident vector would allow you to get the incident plane since the formulas place their tails at the...

If you have the equation of the plane, you should be able to obtain 3 points on the plane and create 2 vectors (non parallel), take the cross product of those and you'll get the normal vector to that plane.

When viewing the light coming from distant galaxies, it is my understanding that there are 2 redshifts occurring, the doppler effect from the galaxies' peculiar motions, and the cosmological redshift from space itself expanding. For the cosmological redshift, I visualize a square of space...