Recent content by Nuha99

I need to use multimedia elements for a 'Design a Room' project. This project is aimed at 8th grade geometry students. Students will have to make buying decisions based on a given budget. They can buy any thing they want, but the limiting factor will be money. They can paint the walls too. Is...

Is pressure in relation to the wall strength the only factor that I need to be worried about? Another question I have regarding this issue is, [FONT="Arial Black"]IF, let's say, there exist a canister whose strength can stand unlimited pressures. Does this mean that I can get unlimited amount...

This is a practical question. A balloon is to be filled with He gas. I know the volume of the balloon. That means I know the mass or number of moles of He gas that is needed. Question is, if a given small canister (volume ~ 150 ml) made out of aluminum can hold this gas. I am thinking of using...

So force on air molecules is some thing like, (Pin - Patm) * A where A is the area of the balloon's nozzle. Since this force is caused by pressure difference, and balloon itself did not exert this force on the molecules, can we say that Newton's 3 rd law is not at work here? I still think...

Homework Statement When the air rush out of a balloon, it shoots out. What physics principle is responsible for this behavior? Homework Equations The Attempt at a Solution Is it due to Newton's 2 nd law or 3 rd law?? We can compare this to a rocket propulsion. We can explain...

I did not want to ask her then, because it might turn her away from me. Now that you have said that stat is not some thing that a 11 th grader would not do, I will ask her. She sounded that she wanted this help asap. Thanks for your answer.

I am beginning to provide tutoring. Today one parent had a request like this: "I needs help with physics stat for my daughter (11 th grade)." What does she mean by 'physics stat'? Thanks.

That does it. Thank you.

Attached file is not validated yet. I did not find the acceleration of the sled. I found the net forward force on the sled. According to my understanding this net forward force is what will make the penguin to slide off. Forward force on the sled = F - fs - fk Note that fs is the...

Homework Statement A sled weighing 60 N is pulled horizontally across snow so that the coefficient of kinetic friction between sled and snow is uk = 0.100. A penguin of 70 N rides on the sled. If the co. static friction between the penguin and the sled is us = 0.700 find the maximum...

Thanks. I tried that before. But now I understand that the force on the big block due to the first block is fk. Not fk - F. With that correction, and your suggestion, I am getting the answer given in the book. I am not still clearly understanding the fact that we are looking at the the first...

Homework Statement A block of mass m rests on the left edge of a block of length L and mass M. Coefficient of kinetic friction between m and M is u. There is no friction between the bottom block (M) and the floor. A constant horizontal force F is applied to mass m, setting it in motion. How...

Do electricians avoid using moderate resistance wire? [b]3. I believe, 'Moderate resistance' in this problem means High Resistance. Am I correct in that assumption? If that is the case, then high resistance of the wire will result in more heating. If the wires become hot, the...

Thanks for your reply. A falling object accelerates with acceleration of gravity, g. Here the given acceleration, as I understand, is the acceleration of the center of mass (linear acceleration). Even though the ball is rolling, C.M is moving in a straight line along the incline so that we...

Q: A ball is at rest on an inclined plane. It begins to roll down with an acceleration of 2 m/s^2. How long does it take the ball to roll 50 m? This is my work: find time using, s = ut + 1/2 a t^2 t = sqrt(2s/a) Plug in the s = 50 and a = 2 Am I right? Thanks a lot.