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Formula Booklet Physics XI
Dear students
Most students tend to take it easy after the board examinations of Class X. The summer
vacations immediately after Class X are a great opportunity for the students to race ah

Question-1
A circular hole of radius 1m is cut off from a disc of radius 6m.
The centre of the hole is 3m from the centre of the disc. Find
the centre of mass of the remaining disc.
Solution:
Let O be the centre of the disc and O that of the hole.
To find

Question-1
Give the location centre of mass of a (i) sphere, (ii) cylinder,
(iii) ring, and (iv) cube, each of uniform density. Does the
centre of mass of a body necessarily lie inside the body?
Solution:
(i) at its geometric centre
(ii) at the centre of

Question-1
A liquid is in equilibrium with its vapour in a sealed container at a fixed
temperature. The volume of the container is suddenly increased.
a) What is the initial effect of the change on vapour pressure?
b) How do rates of evaporation and conde

Question-1
Why is vapour pressure independent of initial amount?
Solution:
Vapour pressure of liquid is defined as pressure exerted by liquid at equilibrium
at a given temperature. Different amounts of liquids exert same equilibrium
pressure at a given te

Example 16.3
Assuming 0.90 + x 0.90 and 1.1 - x 1.1, we obtain
1.8 10-5 =
(x)(0.90+x)
x(0.90)
(1.1-x)
1.1
or
x = [H+] = 2.2 x 10-5 M
Thus,
pH = -log (2.2 x 10-5 ) = 4.66
Check
The pH decreases by only a small amount upon the addition
of HCl. This is consi

Page 1 of 5
Chem201
Winter 2006
EQUILIBRIUM CALCULATIONS
I. Introduction
A. Equilibria in aqueous solutions are usually more complicated than the "simple" cases we have
discussed so far.
B. Multiple equilibria usually exist. For example, consider sodium b

SCH4U
Review for Ksp
1. What is the Ksp of PbCl2 if, in a *saturated solution of lead (II) chloride, the [Cl-] is 0.032 mol/L?
PbCl2(s)
[I]
[C]
[E]
*saturated solution
2X = 0.32
X = 0.016
Pb2+(aq) + 2Cl-(aq)
0
0
+x
+2x
0.016
0.032
at equilibrium
Ksp = [Pb

19
Kb = 1 x 10-14 = 1.56 x 10-10
6.4 x 10-5
2)
(a) Use the Henderson-Hasselbalch equation:
pH = -log(1.8 x 10-4) + log (0.6/0.4) = 3.92
(b)
The pH remains unchanged because the ratio of the formate and formic acid concentration
stays the same.
(c)
Initial

Lecture-XII
Angular momentum and Fixed axis
rotation
Angular Momentum of a System of Particles
Consider a collection of N discrete particles. The total angular momentum of the
system is
The force acting on each particle is
The internal forces come from th

Lecture-XI
Angular momentum and Fixed axis
rotation
How to study rotational motion of an object?
We need to develop techniques to handle the rotational motion of solid bodies.
For example, consider the common Yo-Yo running up and down its
string as the sp

Lecture-XIII
Angular momentum and Fixed axis
rotation
General rigid body motion
The general motion of a rigid body of mass m consists of a translation of the center of
mass with velocity
and a rotation about the center of mass with all elements of the
rig

THIS ITEM WAS NOT SCORED
215
12.90
THIS ITEM WAS NOT SCORED
12.91
The Second Law of Thermodynamics
12.92
FT
This question deals with the Second Lar of Thermodynamics, which states that the
entrophy of an isloated system, which is not in equilibrium, will