Does the atmosphere cool with altitude due to gravity?]]>

Consider the following problem:

I have a 2D disk which emits light in an ever growing hemisphere...

Light through a tube - Solid Angle (Oblique Cone)]]>

Just read http://www.nature.com/news/quantum-gas-goes-below-absolute-zero-1.12146 about negative temperature. I knew I wouldn't understand a single sentence of the actual Science paper, but I took a look at the Science perspective (Lincoln D....

Negative Kelvin temperature? (Recent Science paper)]]>

This is the classical problem of cart HORIZONTALLY pulled by a rope that wraps around a pulley and it's pulled VERTICALLY by say, the same mass as the cart (yeah T1 = T2 horizontal and vertical tensions .. = in MAGNITUDE BUT NOT IN...

What force(s) make(s) change of direction in a pulley]]>

I'm conducting an experiment to calculate the mass flow rate of water. Bellow is a copy of the procedure:

1) Weigh the mass in kg of a container

2) Connect a flow meter to a tap (any source) with a pipe and insure the departure pipe goes into a sink

3) Open the tap an increase...

Can temperature affect the mass of water]]>

Why is the uncertainty in position equal to the wavelength?]]>

The peak wavelengths are at [tex]\lambda_{10}[/tex],[tex]\lambda_{11}[/tex],[tex]\lambda_{20}[/tex]...

(i,j) notation of orders of wave vector]]>

power of transformer]]>

Dot product vs trigonometry in Gauss' law]]>

Lets say that an object is moving at a decelerating speed(-1m/s) starting on 4m/s towards east and stopped after 4 seconds.

(There are no friction.)

After 4 seconds, the object would have 0 speed, no direction and 0 velocity etc.

Question 1 : Is the...

Change of direction in physics]]>

- Electric potential is a scalar quantity.

- It is always possible to assign a value of zero to the...

Electric Potential Energy Concept]]>

Let's say we build the Faraday cage which surround strong radiation such that no radiation can escape to outside world for safety.

What happens on external surface of the Faraday cage in voltage during shielding? Is it fluctuated?]]>

any body please clear my confusion?????]]>

basic charge = 1.6 x e-19C, but number of p or e constituting a C is 6.25 x e18]]>

nilesh]]>

Do Protons and Neutrons Move around in the Nucleus?]]>

Determine equivalent vacuum for water depth]]>

Solenoid Problem]]>

How to Find Force on Rubber Tube from Piston System?]]>

Does weight / inertia / momentum change with temperature?]]>

So if it does mean mass, then my ACTUAL weight is 686N!!! lol...

Scale? -- mass or weight]]>

(b) that the electron is (when it is determined) a point

(c) that the repulsion for an electron to itself is therefore r=0

(d) that r=0 would naively end up with infinite force

What is the way out of this problem?...

When r=0 in Coulomb's law; electron self-repulsion]]>

I'm currently making simulations in Solidworks and am confused.

I have to double the force on a pulley and change the dimensions from the original pulley, in order to withstand the new force.

My hypothesis:

If I multiply all the dimensions by the cubed...

Force Question -- Solidworks model of a pulley system]]>

cantilever equilibrium problem]]>

I understand that the force applied to the pedal goes first to the crank sprocket which then applies a force to the chain at its radius which is the then applied to...

Bicycles and Mechanical Advantage]]>

Are Electron Orbitals Static or Dynamic?]]>

field outside a ferrite cored coil]]>

force, linear and angular acceleration, car & wheels help]]>

stopping potential]]>

Does time have anything to do with subatomic particles ? ( Relativity )

" am a science enthusiast just out of...

speed of subatomic particles]]>