Recent content by obxer22

i was not using kelvin, so i got the answer

Homework Statement A Carnot engine operates between 230°C and 120°C, absorbing 6.30*10^4 J per cycle at the higher temperature. What is the efficiency of the engine? Homework Equations eff = 1 - (Tcold/Thot) The Attempt at a Solution Using this equation, I get 47.83 percent...

I knew I was doing it right! my calculator was in degrees...i hate it when that happens...thanks for helping me figure that out!

Homework Statement If the phase angle for a block-spring system in SHM is π/5 rad and the block's position is given x = xm cos(ωt + phi), what is the ratio of the kinetic energy to the potential energy at time t = 0? Homework Equations PE = (1/2)*k*[(max amplitude)^2]*cos^2(ωt + phi)...