I would say d is the correct answer here, a is completely false due to the second law of thermodynamcs(never can all heat be converted into pure work),b is obviously not true, c would not have a positive entropy change andhence does not occur spontaneously, e doesn't make sense...hence my choice...
A steam turbine in a power plant accepts 4500 kg/hr of steam at 60 bar and 500°C and exhausts steam at 10 bar. Heat transfer to the surroundings (Tsurr = 300K) at a rate of 70 kW.
(a) What condition needs to be satisfied for the turbine to generate the maximum possible power?
I said...
I understand the intergal you did completely, no probs there!
okay here's wat i don't get, how did you change the limits which i had i had, ie 0 and 5 sin u into numbers which I can actaually substitute into the intergal and then solve, it is irrlevant whether a quarter circle or half circle...
sorry
the question is to proove using intergation techniques and this quarter circle as an example, that the area of a quarter circle is 1/4*pi*r^2. Ie intergrate the given integral and compare that to the area of a circle formula and see that they match. However, the question stipulates that...
Hi, i am hoping that someone could help me or give me a hint for the follwing question...i will show what I have done so far
The area of a quarter circle given is
Integral sqrt(25-x^2) dx
Use the substitution x = 5 sinu to evaluate this def integral exactly an show that your answer is...
well thanks for that, and I am sorry about the english...just typing quickly and didn't realize correct grammer is required in a Maths forum...but never the less thanks
hey guys, just hpoping sum1 could point me in the rite direction...i can't wrk out how to proove v^2=n^2 (A^2-x^2) from
v dv/dx = -n^2x
obviously you hav to integrate...but i don't know how they get the A into the equation??
what i hav tried is intergating both sides with recpect to x...