Thermal stress is:
A. Overheating of the brain due to learning too much about
thermodynamics.
B. Force resulting from shrinking or expanding of the
material due to temperature change.
C. Force per unit area resulting from shrinking or expanding
of the mat
Temperature in the room.
Are all of the objects in this room at
(roughly) the same temperature?
A. yes
B. no
C. what do you mean by that?
Phys153 Lecture 2
1
Activity 1a: Touch different
materials
Touch some of the objects in the room,
for example the ta
Monday/Tuesday
Monday/Tuesday
tomic ideal gas undergoes a cyclic process a ! b !
05 P a. Va = 2 10 5 m3 and Vb = Vc = 6 10 5 m3
the path b ! c.
P
c
a
b
V
Thursday/Friday
Name:
1. A mass of 2.0kg is attached to a spring and undergoes simple harmonic motion
PHYS153
Full written solutions for Stirling and Diesel efficiency calculations
Derivation of Stirling cycle efficiency (Activity from class) ~ Page 2
Derivation of Diesel cycle efficiency
- via calculation of the work for the cycle ~ Page 3 & 4
- via calc
Activity 9: Temperature of the Sun
Estimate the temperature of
the Sun using only the
information from this graph
and the data below.
The graph is of a
spectrum of the sun
through the
atmosphere
Radius of the Sun: ~7108 m
Radius of the Earth orbit: 1.5 1
These slides are to supplement the
reading on damped mo2on.
When reading the material on
damped SHM you will nd some
extra terminology and details here.
Assuming Small b the motion should be
approxiamte SHM.
If the dampin
Activity 13. A gas is heated and cooled in different
ways. Find the work for each of process:
1 to 2, 2 to 3, 3 to 4, and 1 to 3.
Pressure
3P0
P0
1
P0 = 200 kPa
2
V0 = 2 m3
3
4
Vhys153 - Lecture 12
P 0
4V0
Volume
1
10/3/11
Activity 13 follow
Activity 16 - Experiment
Activity 16: We put a resistor inside our constant volume
gas thermometer, applied 10V to it and noticed that
current was 1 A. We collected the data showing a
dependence of temperature as a function of time shown
below. Molar spec
\l) ail. % Ls lo om mm shock- Qhemw .0va Mo
WW on H-
Jde huLm<320
1380, a 1% K: @_3_ 3 50063.6}
im% 10?! - .1
mokhvx
" 2" w 4F- : mend
* 2'53 «:17ng ° 15
.\o\'7 M q 2
AA: 0 L \ @130) " 2m "L
Same. kw _. J9. L n z -. q z A 2
CW7 éréj WW wad) PM]
5°
Number of moles is PV/(RT) = .402
U = nCVT = 836 J
Number of moles is PV/(RT) = .402
U = nCT = 836J
Note: change in internal energy only depends on temperature for an ideal gas
and also only depends on Cv
Correct answer is -836 J ; as W = - U and the chan
Tutorial Week 8 Answer Guide
This weeks tutorials are different.
1) They are to help the students prepare for midterm one by giving them 2 midterm
questions from past exams.
2) Because of this, the rules are different: students are to do each question ind
Laser Cu)er
Group Problem
A laser cu)er generates a series of high intensity
pulses rather than a con6nuous beam of light. Each
pulse is about 0.500 J of energy and has dura6on of
10 ns. The laser res 10 pulses
Tutorial Week 8 Answer Guide
This weeks tutorials are different.
1) They are to help the students prepare for midterm one by giving them 2 midterm
questions from past exams.
2) Because of this, the rules are different: students are to do each question ind
A 50 g mass attached to a spring moves on a horizontal,
frictionless surface in SHM. Its period is 4 s. At t=0, the mass is
released from rest with an amplitude of +A.
Find the displacement at t=1 s ? (Pick the closest answer)
A. -A
A.-A/ 2
B.0
C.A/2
D.A
Activity 22A: Cork in water
You are given 2 cups with water, a wine cork, 5 steel nails. There is a
ruler printed at the bottom of this activity sheet. Start with pushing 3
nails into one end of the cork to ensure that it floats vertically. Make
sure tha
Activity 4: P(T) data analysis
On worksheet:
For the data given,
draw a best fit line,
and calculate the
slope and intercept.
What is the intercept?
What does this
mean?
How would the
calibration change
with a different gas or
starting pressure?
Physic
Discussion Question
Before you start writing anything think about what is
being asked.
We will help you break it up into smaller parts.
1
Discussion Question
Helium gas (Cv=12.5 J/(mol K) has initial temperature T1,
pressure P1 and volume V1. It follows a
Tutorials Week of Feb 3
2014
Circuits
ohm
d
watt QuesCon 1 To be done individually: (10 minutes)
these
In the circuit shown, both resistors have the same value
R. Suppose switch S is iniCally closed for a very long
Monday/Tuesday
Tutorial
Midterm Review
Part a) is worth 5 points Part b) is worth 5 po
Thursday
Tutorial
Midterm Review
"1
q-
*'.^-\
-aayur<fuc+
r 4-vllr*qcl fran .,'q cut<
AL;'4LLAL =
JRuLA u
T+ = f 3o .O
b)
A:t1nre- .r c\ "^,r .l^i.s
.: *
Week of Jan 27 slides
1
Group Problem
Each of the two 25-F capacitors shown is initially
uncharged. How many coulombs of charge pass
through the ammeter A after the switch S is
capacitors shown is initially
( A"Fclosed?"
!4 &%.%&/*(-0 0'(12 /0
Group Problem (Heat Transfer)
A copper-bottomed saucepan with thermal conductivity of 401 W/(m K) containing 0.8L of boiling
water, boils dry in 10 min. Assuming that all heat flows through the flat copper bottom, which has a
diameter of 15cm and a thick
ThursdayTutorial week Nov 21
A certain car consists ofa 1000 kg body resting on ts suspension. The
80 kg driver drops a 200 kg load into the car dnd observes that the car body
performs damped harmonic motion With a period T
1.0 s. The driver also
observes
Warm up Clickers
Week of September 16, 2013
1
Celsius or Kelvin?
An auditorium has dimensions 10 m x 10 m x 60 m.
How many moles of air are in this room if the pressure
is 1 atm and the temperature is 25 C? Note that the
gas constant is R=8.31 J mol-1 K
Demos
Mass on a spring with cardboard
Metal bar close to a magnet with motion detector
Damped oscillations
Up to now we only
considered the restoring
forces in SHM. But we
know that in second
Newtons Law
acceleration is
proportional to sum of
all forces
Tutorials Work Sheet 4
Name
Activity ID
Problem
A 100 gram sample of an unknown substance is cooled at a constant rate. The starting
temperature of the sample is 140 C. The temperature data as a function of time is displayed in
the graph below taken from
Demos
Mass on a spring with cardboard
Metal bar close to a magnet with motion detector
Damped oscillations
Up to now we only considered
the restoring forces in SHM.
But we know that in second
Newtons Law acceleration is
proportional to sum of all
forces
2. A person makes a quantity of iced tea by mixing 500g of hot tea (essentially water)
Physics 153 Term 2 UBCice at its melting point. Janthe initial hot tea is a temperature of
with an equal mass of Tutorial Activity Week of If 20, 2014
90 C , what is th
Q2: What is the efficiency of this cycle?
A. 33.3%
B. 50%
C. 66.7%
D. 100%
E. Not enough information given.
1
Q3: Is this cycle more or less efficient than a Carnot
engine with a hot reservoir at 1200K and cold
reservoir at 300K.
A. More
B. Less
2
Recall