Recent content by Munir M

Thanks guys!

Homework Statement So they want me to obtain the general solution for this ODE. Homework Equations I have managed to turn it into d^2y/dx^2=(y/x)^2. The Attempt at a Solution My question is, can I simply make d^2y/dx^2 into (dy/dx)^2, cancel the power of 2 from both sides of the equation...

I found equations for isobaric and isochoric conditions. Q=nCpΔT and Q=nCvΔT. I still don't know how to solve it as none of the values for Cv and Cp are provided.

Homework Statement A gas is to be expanded from initial stage i to final stage f along either path 1 or path 2 on a p-V diagram. Path 1 consists of three steps: an isothermal expansion(work is 23J in magnitude), an adiabatic expansion(work is 35J in magnitude), and another isothermal expansion...

My mistake was using gmol-1 instead of kgmol-1 for the molar mass. Thanks!

Homework Statement When 0.40 mol of oxygen(O2) gas is heated at constant pressure starting at 0 degrees C, how much energy must be added to the gas as heat to triple its volume? (The molecules rotate but do not oscillate) Homework Equations pV=nRT p1V1/T1=p2V2/T2 Q=mcdT Value of Cp for Oxygen...

I see, thanks! :)

Thanks, I got the answer to that as well. If you don't mind, I'm curious as to why the geometry doesn't matter though. Thank you very much for all your help :)

Thanks! I got the answer which was 4.85x10^7m. As for the second part, I tried drawing a right-angled triangle with the distance being the longer non-hypotenuse. I'm assuming the screen is a square.

The bulb is inside of a hollow sphere I assume? That being said I can't think of any equations that can relate the distance to a circle of 1cm2 in the sphere.

This is as far as I got. I tried drawing pyramids with square bases( the source being the tip of the pyramid and the absorbing surface being the square) as well.

Homework Statement A 100W sodium lamp(lambda=589nm) radiates energy uniformly in all directions. (A) At what distance from the lamp will a totally absorbing screen absorb photons at the rate of 1.00 photon/cm2.s? (B) What is the photon flux on a small screen 2m from the lamp? Homework...