Thanks for following up :). Yes, I was confused at where the integral c=∫vf(v)dv was coming from (I don't like using random equations which I don't know where they came from) but I figured out it was pretty much just a definition.
Hi,
I am having trouble with this concept...
"A mean speed (c) is calculated by multiplying each speed by the fraction of molecules that have that speed, and then adding all the products together. When the speed varies over a continuous range, the sum is replaced by an integral. To employ...
Homework Statement
Find (\frac{dV}{dp})_{n,T} for the Van de Waals gas law
Homework Equations
Van de Waals gas law: (\frac{p+an^2}{V^2})(V-nb)=nRT
The Attempt at a Solution
I just started doing problems like these so I would like to know if I am doing them right...
What I did was I took...
Homework Statement
A force F is used to raise a 4-kg mass M from the ground to a height of 5 m. What is the work done by the force F? (Note: sin60 = 0.87; cos60 = 0.5. Ignore friction and the weights of the pulleys.)
A) 50 J
B) 100 J
C) 174 J
D) 200 J
Please click here for picture.
Homework...
Homework Statement
Two adjacent allowed energies of an electron in a one-dimensional box are 2.0 eV and 4.5 eV. What is the length of the box?
Homework Equations
E_n=\frac{h^2n^2}{8mL^2}
The Attempt at a Solution
My question is, since E_n and n^2 are both on separate sides of the equation...
Hi,
My textbook describes Compton scattering the following way:
"...an x-ray photon...has a collision with a slow moving electron...the photon transfers energy and momentum to the electron [and recoils]..."
Is it not true that by definition when a photon collides with a particle it...
So I can't use I^2R, because by definition the current would also be a different value for a new R? But we know the voltage will stay the same for a new R, so we can use V^2/R?