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
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...
Hellllllllllo World
1-
http://www.physicsclassroom.com/Class/refrn/u14l3a1.gif
When a light ray falls on the boundary between two media , some of the energy is reflected back to the first medium,some energy refracts and some energy is absorbed.
how is this exlplained?does it has something...