Recent content by kboykb

That was the answer, thanks :-) Also after seeing what you said I figured out how to do it I was factoring in the specific heat (4184) or using my formulas correctly. Thanks for your help !

Homework Statement (c13p30) A steam-electric power plant delivers 900 MW of electric power. The surplus heat is exhausted into a river with a flow of 6.29×10^5 kg/s, causing a change in temperature of 1.03 oC. What is the efficiency of the power plant (in % Don't enter a unit.)? Homework...

I got it right :-) Sorry, I'm a noob. I was plugging in the wrong Area, and it was causing my number to come out wrong. Thanks!

Homework Statement A wall is insulated with glass wool of thermal conductivity K = 0.046 W/m oC. What is the rate of heat loss (in W) through an area 1.0 m wide by 1.5 m high, insulated with a layer of glass wool 20 cm (.2 m) thick, if the temperature difference across the layer is 20.0 oC...

Nevermind guys, that turned out to be the CORRECT answer. The online Homework program had the answer listed as .00105 m Since I was putting .0011 in it did not accept my answer. Go figure *sigh*

Homework Statement A 1.8- m long brass bar has a square cross section 1.3 cm on an edge. The bar is compressed by a force of 9.0×10^3 N applied to its ends. By how much does the bar shorten (in m)? Homework Equations There is an example in our book explaining how to use a variation of...

I know I shouldn't revive a long gone thread. But I keep getting so caught up in the homework that I forget to show my appreciation. So to Kuruman & Collins, thanks for the help :)

Sorry, I linked an image from the site but I guess it didnt' show up. Can you see the attachment now? and I'm not sure where he got the mg(sqr3) from, I think he may have told me the latter part of another equation that was used and I just don't know the first part.

I have the solution for the problem. I just don't understand HOW this formula was derived. It came from another student, and nowhere in the text has our teacher taught us how do something like this.. Homework Statement...

Okay, that does give me a better visual of everything. I have something that looks like this (Ignore the Text) with 11 as the hypotenuse. If the top vector is 3, would the straight North line be 10.8? (By the pythagorean theorem) I'm not sure what formulas to use here. I'm pretty...

Thanks for the help Delphi! :) (Sorry for my lateness, but wanted to show my gratitude)

Homework Statement A: A boat capable of making 11.0 km/h in still water is used to cross a river flowing at speed of 3.0 km/h. At what angle (in o) must the boat be directed (from the perpendicular to the shore) so that its motion will be straight across the river? B: What is the...

Homework Statement A ball is allowed to roll from rest down an inclined plane, and the distances are marked every 1.6 s. If the second mark is made 1.4 m from the starting point, where is the first mark? Where is the Fourth Mark? Homework Equations x=kt^2 .. k is the constant...