Physics 206b
Homework Assignment XIII
SOLUTIONS
1. Place the following in order of either increasing or decreasing wavelength (be
sure to state which way youre going). In each case, give an approximate
wavelength and frequency for the entity:
a. Yellow li
Physics 206b
Assignment #9
Cross product practice
These problems will not be collected or graded.
SOLUTIONS
Some important properties of the cross v
product:
v v
v
a b = b a
v v
aa = 0
x y = z
y z = x
z x = y
z
x
y
v v
7. Using the right hand rule (
Physics 206b
Homework Assignment XI
SOLUTIONS
1. A square loop of wire with a side length of 13 cm is in a constant magnetic
v
field of B = 2.1T x , as shown. The wire has an overall resistance of 3 . What
average torque is needed to rotate this loop with
Physics 206b
Homework Assignment XII
SOLUTIONS
1. In the circuit below, the resistance is 37 and the inductor is 140 mH. After
switch S is closed, how long will it be before the voltage difference across the
inductor is V?
S
R
L
V
This is just like the an
Physics 206b
Homework Assignment XV
SOLUTIONS
1. A pair of narrow slits is illuminated by a monochromatic (i.e., a single
wavelength of light) source of coherent light with a wavelength of 546
nm. The slits are 3 microns apart. A screen is placed 2 meters
Physics 206b
Homework Assignment XIV
SOLUTIONS
1. An object is placed 14 cm away from a lens with a focal length of 9 cm. Use ray
tracing to determine, qualitatively, the location of the image. (I.e., you neednt be
ultra-precise in this, but do keep the d
Physics 206b
Homework Assignment II
SOLUTIONS
1. A pendulum is constructed out of a very thin rod of copper with a bob at
the end with a mass of 2 kg. When the pendulum is initially built, its
temperature is 290 K and it has a period of one second. If it
Physics 206b
Homework Assignment IV
SOLUTIONS
1. If a refrigerator has a coefficient of performance (efficiency) of 2.5,
how long will it take your refrigerator to cool 1 L of boiling water to
one degree above freezing if the refrigerator draws 1 kW?
We
m
Physics 206b
Homework Assignment VII
SOLUTIONS
1. A man with a mass of 80 kg is being lifted by a winch. The winch is
powered by a 12 V battery and has a resistance of 7 . How long
does it take the winch to lift the man 17 meters?
The resistance of the wi
Physics 206b
Homework Assignment Xpartial (Problem #3 solution is not yet complete.
I will post a final version of this solution set once that is done.)
SOLUTIONS
Some important properties of the cross product for your reference:
z
v v
v v
a b = b a
v v
a
Physics 206b
Homework Assignment V
SOLUTIONS
1. Recall that the definition of the dipole moment p is p Qd . This is
obtained by having a charge of + Q and a charge of Q separated by
a distance d . (Note that in chemistry the dipole moment is called .)
A m
PHYSICS 206b
HOMEWORK #3
SOLUTIONS
M
A=10 cm2
V=100 cm3
P=105 Pa
1. Consider the sample of ideal, monatomic gas in a cylinder sealed by
a piston shown above. Neglect any pressure of atmosphere outside
of the cylinder. If the mass is m = 10.2 kg , how much
Physics 206b
Homework Assignment IX
SOLUTIONS
1. In the circuit below, the resistance is 37 k and the capacitor is 14 nF.
After switch S is closed, how long will it be before the voltage difference
across the capacitor is E?
S
R
C
E
First, understand the
Physics 206b
Homework Assignment VI
SOLUTIONS
1. In your previous assignment, you calculated the total capacitance of
a pair of parallel plates separated by air. To repeat: Consider the
plates to be circular with a radius of 1 cm. Take the separation
betw
Potential energy Electrical PotentialE E
Energy can be stored in an electric field in a way analogous to that in the gravitational field. Recall: P. E. = U = -Workhi to hf = mgh
grav
E
E
So,
Uelec = - We-field
Electrical Potential Energy Plotting Potentia
Geometrical Optics Refraction through prism
Synopsis 1. Prism is a medium enclosed between two plane surfaces intersecting at some angle along a line. The line of intersection of the two planes is called refracting edge and angle of intersection of the tw
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8a. Electromagnetic waves
Due: 11:00pm on Sunday, February 28, 2010
Note: To understand how points are awarded, read your instructor's Grading Policy.
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6a. Induction
Due: 11:00pm on Sunday, February 14, 2010
Note: To understand how points are awarded, read your instructor's Grading Policy.
Understandi