Physics 3B Basic Physics II Spring 2015
Syllabus
Instructor: Professor Tammy Smecker-Hane, tsmecker@uci.edu
Office Hours & Location: Monday 3-5 pm, 2168 Frederick Reines Hall or by appointment
Lectures: MWF, 1:00 1:50 pm, HSLS 100A
TAs: See the class webs
Lecture 7 Superposition and Standing Waves
Ch 14
The Principle of Superposition
o When two (or more) waves
overlap each other, the resulting displacement (disturbance) is the sum of the displacements of the individual waves
y(x,t) = y1(x,t) + y2(x,
Lecture 6 (Ch 13): Mechanical Waves
Sound as Pressure Waves
Sound wave in air: The air piles up in areas of maximum pressure. This disturbance propagates as a wave as particles bump into each other.
Amplitude of Pressure Wave
o The displacement wa
Lecture 5: mechanical waves
Sinusoidal wave function:
Think about it for =0 at t=0 -> y(x,t=0) = sin(kx) y
x
Sinusoidal wave function:
Now let k = 1/m and w = 2/s => y(x,t) = sin(x - 2t) At time t=0 -> y(x,t=0) = sin(x)
y
t=0
x x=- x=2
Sinusoi
Lecture 27 Quantum Physics & Atoms
Final Exam
Wed 10:30am-12:30pm
3 Long Answer [20+20+20 = 60] 3 Short Answer [10+10+10 = 30] 10 MT [3 x 10 = 30] 1/3 pre-midterm material [similar to problems you have seen on midterm or quizzes] 2/3 new material
Lecture 26 Quantum Physics V
"I think it is safe to say that no one understands quantum mechanics. Do not keep saying to yourself' But how can it be like that?' because you will go into a blind alley from which nobody has yet escaped. Nobody knows h
3C Prof. Bullock Midterm MT (1-5, 4 pts each, 20 pts total).
Exam A ID#_
For 1-5, write your answer (A-F) IN THE BOXES below. Only answers marked in the appropriate box will be graded. Unreadable letters will be marked wrong. IF YOU LEAVE A BOX BLA
Lecture 28 Final Exam Review
Final Exam
o The final exam will be on Wed June 11 from
10:30am-12:30pm in this room. o Exam will consist of 10 multiple choice questions and 3 long answer questions + 3 short answer questions. o ~1/3 material from *pre
Lecture 3: Harmonic Motion & Pendulums
Energy and Springs
potential kinetic
Q: We know that in the absence of outside forces, the energy in the spring is conserved => E_total is constant. What is this constant?
Energy and Springs
Q: We know that
Homework 1
Physics 3C Sp 08
page 1 of 7
a) x = (4 cm) cos( /7) = 3.6 cm b) v = dx/dt = -4 cm/s sin(/7) =-1.74 cm/s c) a = dv/dt = -4 cm/s^2 cos(/7) = -3.6 cm/s^2 d) T= 2/ = 2/(1 1/s) = 6.28 s
a) = 3 /s = 2f => f = 3/2 Hz
and T = 1/f = 2/3 s
b)
Physics 3C Webassign Homework 3 Solutions:
This is straightforward addition of y1 + y2. See me or the TA if you have trouble with this one.
3. A tuning fork generates sound waves with a frequency of 260Hz. The waves travel in opposite directions al
Physics 3C Webassign Homework 4 Solutions:
a. b. c. d. e.
t = D/v = (9.8e18m/3.e8m/s) = 3.26e10 s (1yr / 3.155 e7 s) = 1040 yr t = (7.78e11m)/(3.e8m/s) = 2593s = 43.2 minutes t = 2(3.84e8m)/(3.e8 m/s) = 2.56s t = 2pi(6.37e6m)/(3.e8 m/2) = 0.133s t
Physics 3C Webassign Homework 7 Solutions:
The small angle approximation does not work here. is not approximately sin, etc. We can use the formulas for a) At the m=2 maximum, tan = (400m/1000m) => = 21.8 degrees So = d sinb /m = 308 sin(21.8)/2 =
Physics 3C Webassign Homework 6 Solutions:
f = R/2 = 10.05cm a. (1/q) = (1/f) (1/p) = (1./10.05cm) (1/39.3cm) => q = 13.5cm (real) M = -q/p = -13.5/39.3 = -0.344 (inverted) b. same procedure, q=19.4 (real), M = -0.935 (inverted) c. p = f => q = in
Physics 3C Webassign Homework 5 Solutions:
a. Geometry: L = 1.35m = d sin() => d = (1.35m)/sin(42) = 2.02m b. After hitting Mirror 1, the light is moving at 90-42 = 48 degrees from horizontal This means that the light hits mirror 2 with an angle of
Lecture 8 Superposition and Standing Waves
Ch 14
Consider the superposition of two sinusoidal waves moving to the right with the same frequency and wave number along the SAME STRING:
Total: Result is a sinusoidal wave, traveling to the right but wi
Lecture 9
Standing Waves
Boundary Conditions and Quantization
o Because the ends of the string are fixed, they form
a boundary condition
Whatever else happens to the string, the points x=0 and x=L must be fixed (zero displacement)
o This limits t
UC Irvine
June 4, 2013
Quiz # 83
Name: AVQQIA
Show all work for full credit!
1. Consider the electric circuit shown below.
(a) Calculate the value of the resistance R.
2%.DV
(c) Calculate Va Vb H H
W Wt 17 Ma
vw vb _- 2R Ace)
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UC Irvine lhysics 3B
April 9, 2013 Arnold Guerra III
Quiz #13
Name: A Y W O i Student ID#
Show all work for full credit!
1. A piece of wood is 0.610 m long, 0.305 m wide, and 0.0508 111 thick. The density of wood is
600 log/1313 . What volume of lead
Lecture 18
Ch 26, Image Formation, Lenses
Review: Snells Law
Into slower medium: bent towards normal (2 < 1)
Into faster medium: bent away from normal (2 > 1)
Total Internal Reflection
o When n1 > n2 o There will be a critical
angle c where 2 =
Lecture 16
Ch 26, Image Formation, Lenses
Images
p: object distance q: image distance
o An image occurs when light
rays from an object diverge (or appear to diverge) from a place other than the objects location easily solved by drawing a picture
Lecture 13
Short Review + Start of Ch 25
Midterm Friday: 7 Multiple Choice 2 Short Answer 2 Long Answer Approved Calculators Eqt. Sheet provided Through Ch. 24 + 25.2 (todays lecture)
Hookes Law and Springs
o According to Hookes Law, an ideal
spri