Recent content by cycrups

Homework Statement T1= 20C T2=80C Power=2kW Volume= 10liters Homework Equations Q= Power x time Q= m x c x DELTA Temp The Attempt at a Solution Do I need another equation to be able to find the heat? Since I have the equation of the heat I have the mass and I have the temperature but the c I...

It's just a simple question. How does the height effect the other values if the height increases or decreases. What happens when the height increases and what happens when the height decreases?

b(slope) = 0.0002368421 and by taking y and x from the plotted points on my graph y= 3.85 AND x = 3*10^-3 3.85 = (0.0002368421 * 3.10^-3) + ln a => exp ^ [(3.85)-(0.0002368421*(3*10^-3)] = a one question how did you get the formula y = bx + ln a

Ah yes sorry forgot to put the Ln a on there had it while doing the work on paper. What's the next step how I can get to find the parameters a and b? My Prof hinted b should be the slope but I am not sure if I heard him correctly. I tried to figure it out and find out how b can be the slope but...

So first I get the slope which is negative because the line is going downwards. Let's assume the slope is -12.66 what do I do after this step? I know that I need to multiply ln by both sides of the gives equation so I will get lnR = a*(b/t) How do I find a and b from the equation if both of...

I got both for T2 and T3 same temperatures.

Yes it a no problem. I got them thanks! just the last question I don't know how to solve it

Ah Sorry I didn't write the whole question. b. How many mole of gas are in the process? c. Give the missing temperatures at positions 2. and 3. d. Find the efficiency of this cycle e. Compare this efficiency with that of a Carnot cycle between the highest and lowest temperatures reached in...

Homework Statement An ideal monoatomic gas undergoes the following cycle: from 1.) V1 = 1m3, p1=2.5kPa, T1=200k to 2) V2=1m3, p2=7.5kPa then to 3)V3=3m3, p3=2.5kPA, and 4) back to 1). a. Sketch b. How many mole of gas are in the process? c. Give the missing temperatures at positions 2. and 3...

Temperature and R should be the same. The thing I don't know would be the air Pressure and Volume but I doubt the Air would have volume + it's not an ideal gas because it's air. Am I making sense?

Thanks a lot I have got the answer!

I equate both of them together so the PV/nRT (of H2) = PV/nRT of air? I am sorry I am really having a hard time solving this part.

Okay so the density would be → density of air = 16000 Pa / 8.31 * 223 K = 8.63 Kg/m3 and then to find the Buoyant force Fb = 8.63 * 10 m/s3 * 2000 m3 = 172600 Is that correct, and if it is what's the next step? Do I equate Fb = Fg to get the Maximum altitude?

I took it from http://www.ohio.edu/mechanical/thermo/Intro/Chapt.1_6/Chapter2b.html Problem 2.9

or should I use Fb= mass of air * g = P * Vb * g because I don't have air density OR do I get the air density from density = P / R * T ?