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<Shukur A.
Chemistry
Kinetic particle theory
1)The particles in solid liquid n gas are always in motion
2)The particles in solid ,liquid n gas can either b atom,molecules or ions
3)the kinetic energy of solid,liquid n gas increase respectively
4)The intermolecular space between solid,liquid n gas increase respectively
5)The kinetic energy is proportional to temperature of the matter
Collision theory
1)When molecules collide,a reaction takes place
2)when a slow moving molecules with insufficient energy collide,they bounce of from each other
3)when fast moving molecules with sufficient energy collide,a reaction takes place..
4)Forn a collission to occur,molecules requires to poses the minimum energy known as activation energy
5)For a reaction above stated at the top to takes place,colliding molecules have to be place properly directly against from each other,or else,molecules will stay bounce off from each other although the poses sufficient energy....
Physics
Principle of moments
The principle of moment states that when an object is in equlibrium,the clockwise moment at any point is equal to the anti clockwise moment about the same point....
The laws of motion
1)Object at rest remain at rest unless being acted upon
2)The acceleration of an object is proportional to the force exerted on the object
30when object A exerts a force to object B,then object B will exerts an equal amount of force to object A
Example:If a book is place on the table,then the table will exerts an equal amount of force to the book...However if this theory is prove to be wrong,then the book will eventually sink on the table the moment the book is being place on top :P/....!!!that's all today for my revision....MESSIBUKU
01 May 2008
PHYSICS
Principle of moments:The principle of moments states that when an object is in equlibrium...The clockwise moments at any point is equal to the anti-clockwise moment about the same point...
The 3newton laws
!st law:when an object is at rest,it remain at rest unless being acted upon..
2nd law:The acceleration of an object is proportional to the force exerted on the object
F = ma
force mass acceleration
3Rd law
When object A exerts a force at aobject B,then object B will exerts an equal amount of Force to object A...
Other formulas
W=mg(weight = mass x gravitational force)
a=v-u over t (find acceleration)
Density= mass over volume(find density)
Moment=f x d.....Note!! distance mus be from the pivot to the object
work done = f x s
w= force x distance
efficiency: useful energy over total energy x 100%
P= w over t
power = workdone(fxs) over time
SI unit = WATT
K.E kinetic energy= half mv square
GPE gravitational potential energy = mgh(mass GRAV height)
CHEMISTRY
Empirical formula
1.)Mass of sample
2.)Ar of an element
3.)No of moles:mass over ar
4.)Divide both by the smaller num of moles
5.)Ans
Vol OF Gas
formula for gas
Molar volume = 24dm cube
Volume:no of moles x molar volume(if given the mole)
volume:mass over molar mass x molar volume9If moles not given)
Mass of gas:vol x molar mass over molar volume
CONCENTRATION: mole over volume
This for my reference!!! :D.............I CAN DO IT!!