All Reversible Heat Engines have same efficiency when operating between the same two temperature reservoirs.
This is proved by showing that there is a contradiction, if they do not. We set the two heat engines to be compared operating between the same two heat reservoirs. Assume one is more...
So in my calculation y=200 and we also have x=200 , imo that's a quarter of a circle.
I understand your point, i also did at the beginning before you edited it , but the parabola may also ,when stretched, be a circle. Still, it might also undergo a parabolic motion and have x and y coordinates...
So what you are suggesting is that the graph of x-dispacement vs. y-displacement(or in your case porportional to time) is "the path". How do you think that such a thing is true ? I mean , if i stand up now and move forward with a constant accelerating velocity and then move backwards with a...
x=x°+V°*t+1/2*a*t(square)---->x=1/2*0.004*10000=200m I think this is the right answer and it's a quarter of a circle. Still not so sure, but everything seems to be fine with it.
So what you mean is that water has a higher coefficient of kinetic friction than ice ? Nontheless there is no relation between temperature and the coefficient of friction , at least I haven't heard about it. Perhaps what the sir above me said is right sometimes , perhaps the other way around is...