Recent content by dropgigawatt

AH! That makes so much sense! Thanks!

Homework Statement Determine the Req, IT, and the current and voltage across each resistor. Collapse each drawing into one resistor that equals Req. Find the total power used by the circuit. Also determine the voltage, current, and power for each individual resistor. The one I'm having...

Oh! The internal energy must decease too! I totally misinterpreted what you were getting at in #2. Thank you so much Voko.

I'm sorry, I misspoke. What I meant to say was after it is compressed, and the internal energy is 18,750 J, it is less than before, yes. I didn't think that could be correct because in this thread (https://www.physicsforums.com/showthread.php?t=709788) the second post states that if the gas is...

That's what I originally tried. 3/2(125,000)(.10) = 18,750 J but that would mean it has more energy at a lower volume.

Ah, lowering the temperature. So I take it I need to use V1/T1 = V2/T2 = nR and then U = 3/2nRT Since I have 400 g of oxygen, n = 12.5 moles so I've got .25/T1 = .10/T2 = 103.875 but I don't know how to find the T values. Am I on the wrong track?

Homework Statement 400. g of oxygen has a volume of .25 m3 and a pressure of 125,000 Pa. What is the internal energy of the gas? What would the internal energy of the gas be if it were compressed to .10 m3 while the pressure was held constant?Homework Equations U = 3/2 PVThe Attempt at a...

I got it. t = .64 s displacement = 32(.64) = 20.4 m Thanks guys!

Homework Statement Water travels through a pipe with a radius of 1 inch at a speed of 2 m/s. There is a nozzle at the end of the pipe with a radius of 1/4 inch. The pipe is horizontal and 2m above the ground. How far does the water travel in the air before hitting the ground? r1 = 1 in. r2...

Homework Statement In class, we did a lab that consisted of putting a small wooden cylinder in a pipe that contained a spring, pushing it down on the spring and locking it in, then unlocking it which allowed it to launch straight up. We then would add fishing weights to the block to increase...