you can go to this pic(link): http://imageshack.us/photo/my-images/854/scan0002fh.jpg/

In Green Circle: why is K = V^2/2k? and what is the small k? is it kinetic energy?

In Red Circle: what is 778? how 778 appear in this problem?

in Black circle: why is Work=pv?

thx in advanced
just explain even if it just one question you can answer
Godbless

Surely these terms are defined prior to the question ?

 

In any case, all you need to do is check your units. For instance, p and v are in imperial units for pressure and specific volume respectively, so check the imperial units for work, and see what happens when you multiply p and v.

 

As for the 728 and small k. Given that the equation for specific kinetic energy is [math]K=\frac{u^2}{2}[/math] where u is *velocity, this points to either a proportionality constant or a conversion factor, so work through your units.

 

Hint: look up conversion factors for 1 Btu/lbm

 

I'll leave it to you to suss out k.

 

*In your question velocity is given as v₁ measured in fps (feet per second).

i still didnt get the part which 778 appear

i know that ft-lb/BTU must appear in this conversion coz it is in imperial units

but why 778?

can anyone answer me briefly

thx in advance

anyone?

it appears it pertains to small k,(2k)

 

re read what Royston told you.

 

this may help in a small way,

 

http://en.wikipedia.org/wiki/Template:Thermodynamic_symbols

Edited April 23, 201312 yr by krash661