Recent content by janiexo

Thank you :)

Great, that's what I did, only I keep getting the answer 0.7-C/m1 < x* < 0.7 - C/m2 but the actual answer is 0.7-C/m1 > x* > 0.7 - C/m2. I'm probably making some stupid mistake, but this is what I did: m1 < -C/(x*-0.7) < m2 1/m1 > (x*-0.7)/-C > m2 (i changed the signs because i took the...

You are given the following information about the function f(x): i) There is an x-value x* approximately equal to 0.8 such that f(x*)=0 ii) f(0.7) = C is negative iii) m1 < f'(x) < m2 for 0.7 < x < 0.9 where m1 and m2 are positive constants Apple the Mean Value Theorem to f(x) on the...

Ok so x=0.3*9.8/200 = 0.0147? It's just the additional mass (0.3kg) that I need to take into account, not the total mass (0.3+0.4)kg, right?

So at the new point of equilibrium will the force of the spring equal the force of gravity? Would that mean that kx = mg and we just have to solve for x or something?

I'm even stuck on the 1st hint as well! "How far from the new equilibrium position is the plate when the slices of ham land on it?"

You've already calculated the change of Q of the ice (0.001*3.34*10^5). So the change in entropy of the ice is just (0.001*3.34*10^5)/273, which you've done. Regarding the change in entropy of the water, the change in Q is just the negative of the Q gained by the ice i.e. it would be...

Thanks for your help everyone, I understand it now. Things seem a lot clearer in the light of day I guess :)

I had the same problem. It works now though :)

Ok, well the equation is pV = nRT So at the start it's pressure is p_0 and temperature T_0 Before it's closed the temperature is T and the pressure is ... I don't know what the pressure is, would it stay at p_0? So once it's closed the volume stays constant so the pressure must change. The...

I'm really struggling with this concept and can't seem to get my head around it. I don't know why because it seems simple enough but I can't seem to get the answer :mad:: Question: A flask with a volume 'V', provided with a stopcock, contains ethane gas (C2H6) at a temperature of T_0 and...

Haha yep it was around 4%... I can't believe I did all of the hard work and didn't even know whether it should be 104% or 4%. Thanks for your help :)

I must not have understood because I got the same answer of 104%... or should it be 4% maybe? It says to "Express your answer as a percentage. Use three significant figures."

The two questions before it were related to length: *By what amount (deltaL) does the length of the bridge decrease during the Teharian winter when the temperature hovers around -150 degrees celcius * By what amount does the length of the bridge increase during the Teharian summer when the...

The next few questions refer to the Golden Great Bridge, built on planet Tehar in a galaxy far, far away. The bridge-building technology on Tehar is not very well developed: The bridge is just a long slab of pure gold with the opposite ends resting on the shores of the river. In the spring...