Name:
Phys 209 TP-HW #5
Due: Mon., Sep. 3
Problem 1. (10 points) One end of an unsulating metal rod is placed in a container of boiling water at
100 C, and the other end is in an ice-water mixture at 0 C. The rod is 60.0 cm long and has a cross-sectional
Physics 209
Fall 2012
Special Relativity Class #1
SR Units and Spacetime Diagrams
Wednesday, October 17, 2012
I. Wave Speed and Experiments with Light
A. For waves in material media, the speed of the waves is dictated by the properties of the media.
For e
Physics 209
Fall 2012
Special Relativity Class #2 Time
Friday, October 19, 2012 I. Time: The quantity that is measured by clocks. II. Clock Synchronization: One way to synchronize two clocks A and B in an inertial frame is for them to emit flashes of ligh
Physics 209
Fall 2012
Special Relativity Class #3
Spacetime Interval
Monday, October 22, 2012
I. Metric Equation: A metric equation tells one how to calculate distances in a space. In Euclidean
geometry, the distance squared between two points A (with Car
Physics 209
Fall 2012
Special Relativity Class #4 Proper Time
Wednesday, October 24, 2012 I. General Formula for Proper Time: The proper time interval AB between two events A and B for a clock present at both events is given by
tB
AB AB
=
tB tB
dt dt
tB
1
Physics 209
Fall 2012
Special Relativity Class #5
Two Observer Spacetime Diagrams
Friday, October 26, 2012
I. It is possible to prepare a single spacetime diagram that relates the measurements made by two dierent
inertial reference frames. Heres how:
A. F
Physics 209
Fall 2012
Special Relativity Class #6
Lorentz Transformations
Monday, October 29, 2012
I. Coordinate transformations relate the spacetime coordinates of an event measured relative to the
inertial frame S (t, x, y, z ) to the spacetime coordina
Name:
Phys 209 SR-HW #1
Due: Wed., Oct. 17
Problem 1. (10 points) A train moving with a velocity of 55 m/s east passes through a railway station at
time t = t = 0, where t is the time measured by the station frame and t is the time measured by clocks
on t
Name:
Phys 209 SR-HW03 Due: Mon., Oct. 22
Problem 1. (13 points) Imagine that in the year 2065 you are watching a live television news broadcast from the space station at the planet Neptune, which is 4.0 light-hours from earth at the time. At exactly 6:17
Name:
Phys 209 SR-HW04 Due: Wed., Oct. 24
Problem 1. (10 points) Imagine that you and a friend are riding in trains that are moving relative to each other at relativistic speeds. As you pass each other, you both measure the time separation and spatial sep
Physics 209
Fall 2012
Special Relativity Class #0
The Principle of Relativity
Monday, October 15, 2012
I. Denitions
A. Event: A physical occurrence that happens at a denite place at a denite instant in time. It
may be specied by its spacetime coordinates:
Name:
Phys 209 TP-HW #14
Due: Wed., Sep. 26
Problem 1. (10 points) A pair of Einstein solids in a certain macropartition has multiplicities 4.2 10320
and 8.6 10132 . (a) What are the entropies of each solid? (b) What is the total entropy of the system in
Name:
Phys 209 TP-HW #9 Due: Wed., Sep. 12
Problem 1. (10 points) Argon gas is confined to a cylinder with a piston. The gas has an initial pressure of 120 kPa and a volume of 100 cm3 . The piston is slowly withdrawn until the gas's volume has increased b
Physics 209
Spring 2012
Thermal Physics Class #1
Thermal Energy
Friday, August 24, 2012
I. Denitions
A. Heat (Q): The energy that ows across the boundary between two objects as a result of a
dierence in temperature between them.
B. Work (W ): The energy t
Physics 209
Fall 2012
Thermal Physics Class #13
Entropy and the Second Law of Thermodynamics
Monday, September 24, 2012
I. Observation: Macroscopic systems (which have very large numbers of particles N and energy units
q = U/) tend to rearrange themselves
Physics 209
Fall 2012
Thermal Physics Class #14
Entropy, Temperature, Boltzmann Factor
Wednesday, September 26, 2012
I. Temperature and Entropy
A. According to the 2nd Law of Thermodynamics, a system will be found in the state which maximizes its entropy.
Phys 209 TP-HW #02
Due: Mon., Aug. 27
Name:
Problem 1. (10 points) A 22-kg block of iron drops out of the back of a pickup truck traveling at 55 mi/h.
The block slides on the road for 150 m before coming to rest.
A. Model.
B. Visualize/Parameterize.
C. Ma
Name:
Phys 209 TP-HW #3
Due: Wed., Aug. 29
Problem 1. (10 points) A 100 W heater is placed in an insulated container with 10 g of ice at 10 C.
How long will the heater have to run to convert this ice into steam at 100 C?
A. Model.
B. Visualize/Parameteriz
Name:
Phys 209 TP-HW#06
Due: Wed., Sep. 05
Problem 1. (10 points) The rate at which radiant energy from the sun reaches the earths upper atmosphere
is about 1370 W/m2 . The distance from the earth to the sun is 1.50 1011 m, and the radius of the sun is
6.
Name:
PHY 209 TP-HW #8
Due: Mon., Sep. 10
Problem 1. (10 points) The rms speed of Cl2 molecules in a dilute sample of gas is about 180 m/s. What
is the temperature of the gas?
A. Model.
B. Visualize/Parameterize.
C. Math. [Formula First]
D. Assess.
Soluti
Name:
Phys 209 Homework #13
Due: Mon., Sep. 24
Problem 1. (10 points) Consider two Einstein solids A (contains 1 atom) and B (contains 2 atoms) which
have a combined energy UA + UB = 6. These systems, which are isolated from their surroundings, are placed
Name:
Phys 209 SR-HW09 Due: Mon., Nov. 05
Problem 1. (10 points) At 11:00:00.0000 a.m. an air tra c controller gives the wrong instructions to an airliner 150 km north of the control center (Event A). At 11:00:00.0003 a.m., the airliner crashes (Event B).