Recent content by Ahalp

Homework Statement I'm just a bit confused about identifying the capacitors in this circuit as connected in parallel or series. The Attempt at a Solution The solution is parallel, though I am unsure why.

1 mol of every gas occupies the same volume (at the same pressure and temperature). Thanks, it makes sense now :)

Homework Statement A cylinder contains 1 L of air at 10 atm and 298 K. Knowing that air is composed of 79% N2 and 21% O2 by VOLUME, calculate the initial partial pressure for both. Homework Equations Ideal Gas Law: PV = nRT Mole Fraction: yi = moles of i / total moles Partial Pressure: Pi...

Lab 7, eh. Please don't post your code for Labs online. You're giving anybody the chance to copy it, and posting it online is an academic offence. If I were you, I'd delete the code from here and try working at it again. Losing 3 % of your mark isn't a big deal, losing 3 % of your mark...

Alright, thanks! I just have one quick question relating to the original problem. If the system is set accordingly to include all the objects (like Earth and the apple in the original question), is momentum always conserved?

You have the coefficient of friction from part b. You can use this value to find the force of kinetic friction acting on the toboggan+kids. And because the tobaggon must move at a constant velocity, the net force must be zero. Thus, like you wrote, Fa = Fk.

Homework Statement A falling rock gains momentum as its speed increases. Does this observation contradict the law of conservation of momentum. Explain. Answer in the textbook: This observation does not contradict the law of conservation of momentum. The momentum of the Earth increases...

Thanks, this clarifies it a lot!

Yes, but doesn't the normal force equal zero when it is not in contact with a surface. So, during the displacement, isn't the normal force 0 as the only force acting on the object is gravity. Thus, wouldn't the work done by the normal force be zero.

Homework Statement Can the normal force on an object ever do work on the object? Explain your answer. The answer in the textbook is: The normal force can do work on an object. For example, when you jump, you push down on the ground and the normal force pushes up on you and...