HOMEWORK Ch11
Problems 4,7,11,13,17,22,28,35,37,55
PROBLEM SOLUTIONS 11.4 The change in temperature of the rod is
T
Q 1.00 104 J 31.7C mc 0.350 kg 900 J kgC
and the change in the length is
L L0 T
1 24 10 6 C 20.0 cm 31.7C 1.52 10 2 cm 0.152 mm
11.7
(
PRACTICE QUIZ 3
1. Of the following heat engines, which has the highest efficiency? a. Heros engine b. a Carnot engine c. a cars gasoline engine d. a trucks diesel engine b 2. An adiabatic expansion refers to the fact that: a. no heat is transferred betwe
Practice Quiz 4 (Chapter 13) 1) A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is T. How does the period of the pendulum change when the elevator moves upward with constant acce
Practice Quiz 6
1) When the distance between the two charges is doubled, the force between them is A) doubled. B) quadrupled. C) reduced by a factor of 3. D) reduced by a factor of 4. Answer: D 2) When the magnitude of two charges is increased by a factor
Practice Quiz 2 (Ch 11) Name_ 1. Sea breezes that occur near the shore are attributed to a difference between land and water with respect to what property? a. mass density b. coefficient of volume expansion c. specific heat d. emissivity c 2. A 10-kg piec
PRACTICE QUIZ 5
1. The frequency separating audible waves and ultrasonic waves is considered to be 20 kHz. What wavelength in air at room temperature is associated with this frequency? (Assume the speed of sound to be 340 m/s.) a. 1.7 cm b. 5.2 cm c. 34 c
Practice Quiz 1 (Chapter 10) 1. A temperature of 233 K equals which of the following? a. 506C b. 40C c. 40F d. 40F c 2. Which of the following properties can be used to measure temperature? a. the color of a glowing object b. the length of a solid c. the
Practice Quiz 7
1) Two point charges q1 = 4.0 C and q2 = -8.0 C are placed along the x-axis at x1 = 0 m and x2 = 0.20 m, respectively. What is the electric potential energy of this system of charges? A) +1.4 J B) -1.4 J C) -32 J D) 4.0 J Answer: B 2) The
Practice Midterm I
1) How much heat is required to raise the temperature of a 225 -g lead ball from 15.0C to 25.0C? The specific heat of lead is 128 J/(kgK).
A) 725 J Answer: D
B) 145 J
C) 217 J
D) 288 J
2) What is the net power that a person with surface
PHYSICS 102 Home Take Midterm Exam II
Last Name_ First Name_
Circle the answer and mark this choice on the scantron. To get a full credit show the all calculations steps in the spaces provided. All the work must be shown in order to receive FULL credit. N
Practice Quiz 8 (Combined Chapters 17-18) 1) A light bulb operating at a voltage of 120 V has a resistance of 200 . What is the power? A) 100 W B) 72 W C) 14 10-3 W D) 7.2 W Answer: B 2) A 100-W light bulb is connected to a 110-V source. What is the resis
Practice Quiz 2 Name_
1) An electron and a positron are released simultaneously from rest and start to move towards each other because of the attractive Coulomb force between them. (Note: A positron is the antiparticle of the elec tron, being in all aspec
Chapter 16
Electric Energy and Capacitance
Dr. Armen Kocharian
Electric Potential Energy
The electrostatic force is a conservative force It is possible to define an electrical potential energy function with this force Work done by a conservative force is
Chapter 15 Electric Forces and Electric Fields
Dr. Armen Kocharian
First Observations Greeks
Observed electric and magnetic phenomena as early as 700 BC
Found that amber, when rubbed, became electrified and attracted pieces of straw or feathers
Also disco
Chapter 14
Sound
Dr. Armen Kocharian
Producing a Sound Wave
Sound waves are longitudinal waves traveling through a medium A tuning fork can be used as an example of producing a sound wave
This picture is not in the new version, but fits very nicely. Eithe
Chapter 13
Vibrations and Waves
Dr. Armen Kocharian
Hookes Law
Fs = - k x
Fs is the spring force k is the spring constant
It is a measure of the stiffness of the spring
A large k indicates a stiff spring and a small k indicates a soft spring
x is the di
I
.
Chapter 9
9-2. Boyle's
law (Eq. 9-2) states that at
'
temPerafure the product PV is constant. That is pressure changes so does volume so
P1v1
constant as that the
belt that pass by per second is Vp. Therefore the
number of particles passing a point ea
I
Chapter
11-2.
11,
As stated in the text, 4.83 Cal of energy
are
produced/liter of co^nsumed oxygen; The volume bf thu -o* is 27 m3 :27 x 106im3 : 27 x t03 liter of this volume, 27 x 103 x 0'2 : 5'4 x 103 liter is oxYgen.
This amount of oxygen can sustai
HOMEWORK Ch 12
CH 12: 3,5,10,19,21,24,28,34,48,58
12.3 The constant pressure is P 1.5 atm 1.013 105 Pa atm 1.52 105 Pa and the work done on the gas is (a)
W P V
V 4.0 m3 and
W P V 1.52 105 Pa 4.0 m3 6.1 105 J
(b)
V 3.0 m3 , so
W P V 1.52 105 Pa
3.0 m3
Chapter 12
m. ffQ \_/
intensity of riveting is to-7 w1 cm2
1
:
19-16
ry7*tz
:
lo-eergs/s- cm2
Threshold of hearing is 10-16 W/ rrrr2 of thd riveter 's 10-16 Wcm2
Let R be the distance at whidr the sound intensity
^e
Therefore Ps
:
(l2go)1/2
t0-3 x 3.3 v
1
HOMEWORK 13
CH 13: 4,8,10,12,20,21,25,27,36,39,51,53
13.4 (a) The spring constant is
k
Fs x
mg 50 N 1.0 103 N m x 5.0 10-2 m
F Fs kx 1.0 103 N m 0.11 m 1.1 102 N
(b) 13.8 (a) The graph will be a straight line passing through the origin with a slope equal
HOMEWORK CH 14
4,8,12,16,20,24,29,33,35,51,53
14.4 The speed of sound in seawater at 25C is 1 530 m s . Therefore, the time for the sound to reach the sea floor and return is
t
2d 2(150 m) 0.196 s v 1530 m/s
14.8
At a temperature of T = 10.0C = 283 K, the
Physics 102
Winter Quarter 2011 Professor ARMEN N. KOCHARIAN
Department of Physics and Astronomy, California State University, Los Angeles
Email: armen. [email protected] Email: [email protected]
Web site: http:/www.calstatela.edu/faculty/
Chapter 10
Heat
Dr. Armen Kocharian
Thermodynamics Historical Background
Thermodynamics and mechanics were considered to be separate branches
Until about 1850 Experiments by James Joule and others showed a connection between them
A connection was found
Chapter 12
The Laws of Thermodynamics
Dr. Armen Kocharian
First Law of Thermodynamics
The First Law of Thermodynamics tells us that the internal energy of a system can be increased by
Adding energy to the system Doing work on the system
There are many pro
HOMEWORK Ch 10
5,7,21,22,27,31,33,36,42,51
10.5 Start with TF 40F and convert to Celsius.
TC
5 5 T 32 9 40 32 40C 9F
Since Celsius and Fahrenheit degrees of temperature change are different sizes, this is the only temperature with the same numeric value