HOMEWORK NO.3
PHY12
Fourth Term 11-12
ELECTROSTATICS AND ELECTRICITY
1. Two charges are positioned as shown in the
diagram.
a) Find the magnitude and
direction of the electric field at A. b) A charge
placed at A experiences a force of 610 -3 N
towards the
Dot product
Work and Energy
Kinetic energy
Work done by varying forces
DOT PRODUCT
5/13/2016
2
Dot product
Component form
Multiply parallel components of each vector
Rules for unit vectors:
Add the results
Only the parallel components
A Axi Ay j Az k
B Bx
Momentum
Impulse
Internal vs. External Forces
Conservation of Linear Momentum
MOMENTUM
5/13/2016
2
Momentum
Vector description of motion
p mv
Momentum of object of mass m and velocity v
Product of mass and velocity
Note: VELOCITY, not speed
Can be split i
MAPUA INSTITUTE OF TECHNOLOGY
Department of Physics
E302: Heat and Calorimetry
RAYCO, Cyryl John B.
cyryljohn5@yahoo.com.ph/2012104454/CpE-2
PHY12L-B4 Group 5
SCORE
Signed Data Sheet
(5)
=
Observations & Results
(15)
=
Graphs
(10)
=
Conclusion (15)
=
Refe
GRAPHS
Frequency of vibration
Frequency vs Length of the String
97.95
100
92.81
95
90
87.77
85
80
33.0 cm
40.0 cm
44.0 cm
Length of string that has a similar number of segments
Frequency vs. Length of String
This graph is frequency vs length of the string
MAPUA INSTITUTE OF TECHNOLOGY
Department of Physics
E303: Kundts Tube: Velocity of Sound in Solid
RAYCO, Cyryl John B.
cyryljohn5@yahoo.com.ph/2012104454/CpE-2
PHY12L-B4 Group 5
SCORE
Signed Data Sheet
(5)
=
Observations & Results
(15)
=
Graphs
(10)
=
Con
MAPUA INSTITUTE OF TECHNOLOGY
Department of Physics
E301: Linear Expansion
RAYCO, Cyryl John B.
cyryljohn5@yahoo.com.ph/2012104454/CpE-2
PHY12L-B4 Group 5
SCORE
Signed Data Sheet
(5)
=
Observations & Results
(15)
=
Graphs
(10)
=
Conclusion (15)
=
Referenc
WAVE MOTION
Wave occurs whenever a system is disturbed from equilibrium
due to transfer of energy and when the disturbance can travel
or propagate from one region of the system to another.
tsunami
Classifications of Wave
1. Mechanical Waves waves that tra
THERMAL PHYSICS
THERMOMETRY
Thermometry is a science that deals with
the study, design and calibration of
temperature-measuring
device
called
thermometers.
Each division in the temperature scale is
called a degree ().
Liquid Thermometer
Digital Thermome
LONGITUDINAL WAVE
Velocity of longitudinal Wave
The velocity of longitudinal wave depends both on the
elastic modulus and mass density of the medium.
v
where:
= elastic modulus
= mass density of the medium
For solids, v
Y
For liquids, v
For gases, v
Electric
Circuits
Electromotive Force and Current
In an electric circuit, an energy source and an energy consuming device
are connected by conducting wires through which electric charges move.
Electromotive Force and Current
Within a battery, a chemical r
PROBLEM SET
Heat Exchange and Heat Transfer
PHY12 May 4, 2012
1. Law of Heat Exchange. You are very particular about the temperature of beverages. You
want to cool 2 liters of hot tea (essentially water) from a temperature of 98 C to 1C by adding
ice from
MECHANICAL
WAVE
Mathematical Description of Periodic Waves
y
x
x
MECHANICAL
WAVE
Mathematical Description: POSITION, y(x,t)
At x = 0 at any time, t
x=0
y(x = 0, t) = A cos t = A cos
2ft
Where:
A amplitude (m or cm)
angular speed (rad/s)
f frequency (cycl
PROBLEM SET
PHY12 April 25, 2012
Thermal Expansion
1. The coefficient of volume expansion for gold is 4.20 105/C. The density of gold is 19 300 kg/m3
at 0.0 C. What is the density of gold at 1050 C?
2. A copper wire and a lead wire are joined together, en
WAVE MOTION PROBLEM SET
ANSWERS
1. length of antenna bar = 2.85 m
2. new position of the finger = 0.59 m
3. speed of sound in the aluminum bar = 1551.80 m/s
4.
a. tension in the string = 16262400 dynes
b. frequency = 660 Hz
5. 12th overtone is equal to 25
Fourth Term / May 2012
WAVE MOTION
INSTRUCTIONS:
Answer the following items. You may opt to submit a
computer print of the solution or in engineering
lettering format only.
PHY12 SECTION A3
HOMEWORK N0. 2
1. You have a stopped pipe of adjustable length cl
Elas%city and Plas%city
Chapter 11
ELASTICITY
20/06/16
RCBatac Physics 71 Lecture 32
2
Elas%c materials
Common interpreta%on: Can be stretched
Important characteris%c:
Returns to ini%al state when you stop applying forces
Otherwise, material