Recent content by Shindo

Well, if the engine is off the engine will slowly but surely cool down. But maybe not evenly. Adding water when it's at its hot state gives a more even distribution of equilibrium, so the engine won't break off.

Yeah, this was a difficult question to think about, because I'm not sure if an understanding of engines was needed or not. If I had to pick an answer it would be that the water needs to be boiled first, and too much water means only some of the water is boiled whereas the rest of the water can...

So I'm not too sure about the answer to this question: explain why it is advisable to add water to an overheated automobile engine only slowly, and only with the engine running? So if something is overheating, it makes sense to want to cool it. Since the water's temperature is less than that...

Right, but in this case since the mass doesn't change it doesn't change where the ball feels its maximum momentum.

Homework Statement A pendulum hung by a string that is 90m (simplicity's sake) can come a maximum of 72m leftward or right ward. Where does it feel it's maximum momentum? m=meters M=mass Homework Equations PE=mgh KE=.5(M)(v)^2 Mv= momentum The Attempt at a Solution My question is: will a...

Homework Statement a 280-kg piano slides 4.3m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. I know how to find the solution, but there's something that I don't understand about why it's that way. In order to find the force...

Sure: ##F## = (##m## X ##g##)/(##\mu_h## + ##\mu_w##). So what I'm getting is that since there are two friction coefficients, they add together? My first thought was that the force required was equal to 100/0.6. But I'm not sure why it's half of that.

Hmm, so if one coefficient was 0.6 and the other 0.7, the net coefficient force would be 1.3. So does that mean that there's only one normal force, but the boy is dancing with two frictions: one with him and the sign and the other with the sign and the wall? Which causes the net coefficient to...

Homework Statement If the coefficient of static friction between the sighn and his hands is 0.6, and the coefficient of static friction between the sign and the wall is also 0.6, with what force must the boy push to keep the sign in place? Homework Equations 0.6(Fn)=100 N Fn=166.7 N The...

Okay, but just to clarify, the question is asking how fast the person needs to run a 30 meter distance, with 1.8 m/s of force AGAINST him; all that it is faster than 11 seconds?

Homework Statement The escalator that leads down into a subway station has a length of 30.0 meters and a speed of 1.8 meters/second. relative to the ground. A student is coming out of the station by running in the wrong direction on this escalator. The local record time for this trick is 11...

In Calculus, I am studying differentiation at the moment. The two equations is the basic Derivative function: (f(x+h)-f(x))/h and the alternative formula: (f(z)-f(x))/(z-x); and I can see how they both have their own purposes for finding the tangent line and such; but when will differentiation...