http://www.wunderground.com/cgi-bin/findweather/getForecast?query=denver+co

You will see the local pressure (at the time of this writing) is listed...

Why does barometric pressure differ from measured pressure?]]>

Hope i can get my answer :)...

Burning a water balloon]]>

I'm looking for some help from someone expert in optics to create an inteferometry based setup to map the surface of a small object. This is for a small lab project so I'm not looking for a really complex setup, I just need something simple that can be built in a short amount of...

Help to find a simple setup for optical surface topography]]>

Tex]]>

Complex numbers sometimes *Required* in Classical Physics?]]>

I read the old thread posted in 2003...

Light bulb in a microvawe oven]]>

I assume that it would be the light hitting the earth heating it for obvious reasons, like seasons....

suns heat to earth]]>

But from conservation of charge, the net charge in a metal...

Electric field due to point charge on an infinite metal plat]]>

I am trying to quantify an impulse from a hand (a high velocity low amplitude motion). In attempt to do that, I've tried attaching an accelerometer to my hand.

My problem is, that the values I'd like to calculate as an objective...

Using accelerometer data to calculate distance]]>

I'm investigating the relation of the length and number of turns of a search coil of a fluxmeter (measure magnetic flux). I got to an equation

B= qR/nA

where q is the quantity of charge passed through search coil

R is the combined resistance of search coil and fluxmeter

n is the number...

Optimum Length & Turns for a Search Coil of a Fluxmeter]]>

P.S. With laser cooling you can slow down light to 38MPH.]]>

What would be the result if I made a newtons cradle in which the size/mass of the balls gradually decrease?

My instinct tells me that the...

asymmetrical Newton's cradle]]>

Q: Calculate average length of photon path: emit->absorb]]>

possible to make your own magnetic gears?]]>

Calculus & magnetic force on charged particle]]>

I have been reading about Conway's game of life, and learned about the halting problem. Basically, you can reach states in the game that are irreversible. Basically, the conditions at any point in time, in general,...

Does the past exist?]]>

E=0 inside the conducting sphere Always?]]>

Amount of charge stored by thin conductive plate]]>

Total momentum of a system is said to be conserved in perfectly inelastic collisions also. I have a slight problem trying to comprehend a simple example regarding the same.

If a small mass 'm' , say a ball is thrown at a huge stationary mass 'M' , say a wall. If the collision is...

Momentum conservation in perfectly inelastic collision]]>

I'm literally right at the start of this, with just a sun and an earth. Initially I had my earth going round my...

Dynamics of the solar system]]>

-"Plate-out" refers to the deposition of daughter products of a radioisotope onto the surface of another material. For example, one might say "I am measuring the plate-out rate...

Can someone please explain what plate-out is/means?]]>

the first term of KG-Lagrangian is: [itex]\frac{1}{2}(\partial^{\mu}...

derivative of lagrangian density]]>

If we consider a string with a loose end and the other end attached to a wall we expect the string to have zero displacement at the wall and to have a reflected wave...

Wave reflected on a hard wall]]>

I have a lot of questions concerning Wave propagation, but I will not pose them all into one thread, because of my experience, that part of them will be overlooked.

So lets get started:

1. Phase shift, E-B- Independence

Consider a plane wave generated by a distant dipole antenna,...

Propagation of EM-Waves, Independence of B and E, and Grav..]]>

Photon excitation to full orbitals]]>

The decomposition is...

The TNB components of the jerk vector]]>

After a course on refrigeration and air con over the summer I'm looking for a subject to study for a dissertation next year.

From the course I'm very interested in absorption refrigeration as it could have great potential for less economically developed countries and refugee camps.

I've...

The disappearance of Absorption Refrigeration]]>