Recent content by Misr

No that's not a homework ..I thought of these questions by myself. as for the second question I'll tell you what I can imagine about this so far>> the hammer applies a force on the nail by pulling on it the nail has an equal reaction in the opposite direction the nail applies force on the wall...

Hello 1- work done to push body forward is greater than to pull body backward what is the explanation for this?can you draw the two FBD in both cases ? 2- why is nail driven in wooden wall but not in the concrete wall ؟ I guess this is somehow related to Newton's third law Thanks

up.....

hello world long time no see..actually I've been very confused with this resting membrane potential I've sooo many questions but i'll only ask one question for now .at rest the membrane of nerve cell is permeable to potassium , potassium goes outside the cell along its concentration gradient...

I still can't understand osmosis in this thermodynamical point of view,I've never studied thermodynamics before but can you tell me what makes he less concentrated solution contains more free energy?I've read this somewhere on the internet n copuldn't understand why both of you are introducing...

true story...Actually I don't feel very motivated, we have begun studing for about 3 weeks and I'm doing very well becoz I'm feeling very lazy,desperate and hopeless thanks so much Mr.Tareq,your post means a lot to me

Hello,world..missed you really I've searched the internet for a good explanation for osmotic pressure see this page for exapmle http://chemed.chem.wisc.edu/chempaths/GenChem-Textbook/Osmotic-Pressure-854.html the idea I don't understand here Is why applying a pressure to the solution of...

first of all I'd like to thank you all for your great posts :) it's hard,I don't think I'm that lucky when I start studying in university after few day I'm sure I'll find a certain subject I'm interested in.. true true...I asked myself this question several times to make sure that I'm not...

Hello again, missed this forum really first before posting my question I have to thank you for helping me with physics and maths problems and discussing physical topics in a really good way, I got the full mark in the physics exam and now I've chosen to join the faculty of medicine...

Awwww Great answers indeed! because they are point masses so they have no volume or mass ..Is that true? I'm asking where this (2L) in the equation has come from?why isn't the equation frequency = V/L instead? may be I can't understand the equation because I've a problem in understanding the...

Hello,world 1-"the intermolecular attractive forces between gas particles are very weak due to the large intermolecular distances separating them" Is that true? this is wriiten in my textbook and it is confusing me because I've always thought of it in a different way ,I thought the...

okay,I still can't imagine

http://xanadu.math.utah.edu/java/brownianmotion/1/ I can't imagine

hello there?what's wrong with my post

Yes I know that and i already mentioned it in the first post but I can't just imagine why intermolecular forces makes molecules lose energy? but I can imagine that when the molecule rebounces , the other molecule attracts it so decreasing its kinetic energy and its speed.Is that okay? how about...