The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
A14.7
A planet (P) is moving around
the Sun (S) in an elliptical orbit.
As the planet moves from
aphelion to perihelion, the
planets angular momentum
A. increases during part of the
motion and decreases during the
rest of the motion.
B. increases at all t
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
Question
A tuning fork vibrates at 440 Hz, while a second
tuning fork vibrates at an unknown frequency.
They produce a tone that rises and falls in intensity
three times per second. The frequency of the
second tuning fork is
A. 434 Hz
B. 437 Hz
C. 443 Hz
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
A17.1
The illustration shows a thermometer that uses a
column of liquid (usually mercury or ethanol) to
measure air temperature. In thermal equilibrium,
this thermometer measures the temperature of
A. the column of liquid.
B. the glass that encloses the l
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
PERIODIC MOTION II
PHYS1312
Lecture 16
1
Intended Learning Outcomes
After this lecture you will learn:
1) various types of harmonic oscillators
2) damping effect on a harmonic oscillator
3) forced oscillator and the phenomenon of resonance
2
Vertical Spri
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
WAVE MOTION AND SOUND III
PHYS1312
Lecture 19
1
Intended Learning Outcomes
After this lecture you will learn:
1) Beats
2) The Doppler effect
3) Sound wave
2
Superposition of Sinusoidal Waves Case 3
(12)
Assume two waves are
traveling in the same
direction
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
Q18.1
A quantity of an ideal gas is contained in a balloon. Initially the gas
temperature is 27C.
You double the pressure on the balloon and change the temperature so that
the balloon shrinks to onequarter of its original volume. What is the new
temperat
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
TEMPERATURE AND HEAT
PHYS1312
Lecture 20
1
Intended Learning Outcomes
After this lecture you will learn:
1)
2)
3)
4)
5)
zeroth law of thermodynamics
the absolute (Kelvin) temperature scale
thermal expansion
heat capacity and latent heat (revision)
heat t
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
WAVE MOTION AND SOUND II
PHYS1312
Lecture 18
1
Intended Learning Outcomes
After this lecture you will learn:
1) reflection of traveling wave under open and
fixed boundary conditions
2) Superposition principle and interference
3) Standing wave
2
Superposit
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
A15.9
While a guitar string is vibrating, you gently touch
the midpoint of the string to ensure that the string
does not vibrate at that point.
The lowestfrequency standing wave that could be
present on the string
A. vibrates at the fundamental frequency
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
(a)
A > 0.10 m
(b)
A = 0.10 m
(c)
A < 0.10 m
1
(a)
0<
(b)
=0
(c)
<0
2
Question
To double the total energy of a spring and mass system
oscillating in SHM, one should increase the amplitude
by a factor of _.
A.
B.
2
2
C.
4
3
Question
To double the total en
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
PERIODIC MOTION I
PHYS1312
Lecture 15
1
Intended Learning Outcomes
After this lecture you will learn:
1) definition of simple harmonic motion
2) relation between uniform circular motion and simple
harmonic motion
3) description of simple harmonic motion i
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
GRAVITATION II
PHYS1312
Lecture14
1
Intended Learning Outcomes
After this lecture you will learn:
1) Keplers laws of planetary motion
2) gravitation effect of a spherical mass distribution is the
same as a point mass
3) the apparent weight due to rotation
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
A15.2
Which of the following wave functions describe a
wave that moves in the xdirection?
A. y(x,t) = A sin (kx wt)
B. y(x,t) = A sin (kx + wt)
C. y(x,t) = A cos (kx + wt)
D. both B. and C.
E. all of A., B., and C.
1
A15.1
If you double the wavelength of
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
THERMAL PROPERTIES OF
MATTER I
PHYS1312
Lecture 21
1
Intended Learning Outcomes
After this lecture you will learn:
1) equation of state ideal gas equation and the
van der Waals equation
2) pV diagram
3) kinetic theory and the derivation of the ideal gas
The Hong Kong University of Science and Technology
PHYS 1312

Fall 2014
A.Temperature
B. Pressure
1
A19.1
A system can be taken from state a to state
b along any of the three paths shown in the
pV diagram.
If state b has greater internal energy than
state a, along which path is the absolute
value Q of the heat transfer the