TEMPERATURE AND HEAT
PHYS1112
Lecture 20
1
Intended Learning Outcomes
After this lecture you will learn:
1) zeroth law of thermodynamics
2) the absolute (Kelvin) temperature scale
3) heat capacity and latent heat
2
Thermal Physics (not required)
Deals w
PHYS1112, fall 2012.
Homework #2 solutions.
4.5.IDENTIFY: Vector addition.
r
SET UP: Use a coordinate system where the + x -axis is in the direction of FA , the force applied by
dog A. The forces are sketched in Figure 4.5.
EXECUTE:
FAx = +270 N, FAy = 0
PHYS1112, fall 2012.
Homework #1 solutions.
1.14.
IDENTIFY: When numbers are multiplied or divided, the number of significant figures in the result
can be no greater than in the factor with the fewest significant figures. When we add or subtract
numbers i
C
n
o
s
a
t
:
acceleration due to gravity = 9.80 m/s2
Gravitational constant = 6.67 10-11 N m2/kg2
Avogadros number = 6.022 1023 molecules/mol
Boltzmann constant k = 1.38 10-23 J/K
Gas constant R = 8.31 J/molK
Stefan-Boltzmann constant = 5.670 10-8 W/m2 K
PHYS1112 Fall 2013
Homework 7 Solution
10.19.
IDENTIFY: Since there is rolling without slipping, vcm R. The kinetic energy is given by
Eq. (10.8). The velocities of points on the rim of the hoop are as described in Figure 10.13 in
Chapter 10.
SET UP: 3.00
WAVE MOTION AND SOUND III
PHYS1112
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
directi
THERMAL PROPERTIES OF MATTER
II
PHYS1112
Lecture 22
Intended Learning Outcomes
After this lecture you will learn:
1) heat capacity of gases, experimental and theoretical
aspects
2) phase diagram of a substance
Heat Capacity of Ideal Gas
heat needed to ra
THERMAL PROPERTIES OF MATTER I
PHYS1112
Lecture 21
1
Intended Learning Outcomes
After this lecture you will learn:
1) equation of state ideal gas equation
2) p-V diagram
3) kinetic theory of the ideal gas
2
Mole
One mole is the amount of substance that
DYNAMICS OF RIGID BODIES IV
ANGULAR MOMENTUM
PHYS1112
Lecture 12
1
Intended Learning Outcomes
After this lecture you will learn:
1) the angular moment of a system of particles and rigid
body.
2) how to describe dynamics of a system using its angular
mome
MOMENTUM, IMPULSE, AND
COLLISIONS II
PHYS1112
Lecture 8
1
Intended Learning Outcomes
After this lecture you will learn:
1)
2)
3)
4)
characteristics of elastic collisions.
center of mass and its relation to center of gravity.
the dynamics of the center of
DYNAMICS OF RIGID BODIES I
PHYS1112
Lecture 9
Intended Learning Outcomes
After this lecture you will learn:
1) radian as a measure of angle
2) angular displacement, velocity and acceleration and their
vector representation
3) angular motion as compared t
DYNAMICS OF RIGID BODIES III
PHYS1112
Lecture 11
Intended Learning Outcomes
After this lecture you will learn:
1) how to deal with a rigid body rotating about a moving
axis, e.g. a yo-yo
2) the ideal case of rolling without slipping.
3) rolling friction
DYNAMICS OF RIGID BODIES II
PHYS1112
Lecture 10
Intended Learning Outcomes
After this lecture you will learn:
1) how to calculate the moment of inertia of simple
symmetric rigid bodies
2) the parallel axis theorem to find the moment of inertia
about diff
POTENTIAL ENERGY & ENERGY
CONSERVATION
PHYS1112
Lecture 6
1
Intended Learning Outcomes
After this lecture you will learn:
1) gravitational and elastic forces as examples of
conservative force
2) properties of the potential energy function of a
conservati
MOTION IN 1D & 2D
PHYS1112
Lecture 2
Intended Learning Outcomes
After this lecture you will learn:
1. motion along a straight line
2. to predict the trajectory of projectile motion
3. 2D motion: projectile motion
displacement, velocity and acceleration i
WAVE MOTION AND SOUND II
PHYS1112
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
FIRST LAW OF THERMODYNAMICS II
PHYS1112
Lecture 24
Intended Learning Outcomes
After this lecture you will learn:
1) Cp and CV of ideal gas
2) adiabatic process for ideal gas
3) heat engine and refrigerator
Molar Specific Heat
C is NOT a state function (
SECOND LAW OF THERMODYNAMICS
PHYS1112
Lecture 25
Intended Learning Outcomes
After this lecture you will learn:
1) stating the second law of thermodynamics in terms of heat
engine and refrigerator
2) Carnot cycle as the most efficient heat engine
Two diff
PHYS1112 Fall 2013
Homework 10 Solution
15.11.
IDENTIFY and SET UP: Read A and T from the graph. Apply Eq. (15.4) to determine and then
use Eq. (15.1) to calculate v.
EXECUTE: (a) The maximum y is 4 mm (read from graph).
(b) For either x the time for one
PHYS1112 Fall 2013
Homework 1 Solution
3.37.
IDENTIFY: Relative velocity problem in two dimensions.
(a) SET UP: vP/A is the velocity of the plane relative to the air. The problem states that vP A
has magnitude 35 m/s and direction south.
vA/E is the veloc
PHYS1112 Fall 2013
Homework 2 Solution
4.5.
IDENTIFY: Vector addition.
SET UP: Use a coordinate system where the x-axis is in the direction of FA , the force
applied by
dog A. The forces are sketched in Figure 4.5.
EXECUTE:
FAx 270 N, FAy 0
FBx FB cos600
PHYS1112 Fall 2013
Homework 5 Solution
8.50.
IDENTIFY: Elastic collision. Solve for mass and speed of target nucleus.
SET UP: (a) Let A be the proton and B be the target nucleus. The collision is elastic, all velocities
lie along a line, and B is at rest
PHYS1112 Fall 2013
Homework 8 Solution
13.3.
IDENTIFY: The gravitational attraction of the astronauts on each other causes them to accelerate
toward each other, so Newtons second law of motion applies to their motion.
SET UP: The net force on each astrona
PHYS1112 Fall 2013
Homework 9 Solution
14.19.
IDENTIFY: Compare the specific x(t ) given in the problem to the general form of Eq. (14.13).
SET UP: A 740 cm, 416 rad/s, and 242 rad.
EXECUTE: (a) T
(b)
2
2
151 s.
416 rad/s
k
so k m 2 (150 kg)(416 rad/s)
PHYS1112 Fall 2013
Homework 4 Solution
y1 0
7.13.
y2 (800 m)sin369
y2 480 m
Figure 7.13a
(a) IDENTIFY and SET UP: F is constant so Eq. (6.2) can be used. The situation is sketched in
Figure 7.13a.
EXECUTE: WF ( F cos )s (110 N)(cos0)(800 m) 880 J
EVALUATE
PHYS1112 Fall 2013
Homework 3 Solution
6.4.
IDENTIFY: The forces are constant so Eq. (6.2) can be used to calculate the work. Constant speed
implies a 0. We must use F ma applied to the crate to find the forces acting on it.
(a) SET UP: The free-body diag
PHYS1112 Fall 2013
Homework 6 Solution
9.7.
IDENTIFY:
z (t )
d
d z
. z (t )
. Use the values of and z at t 0 and z at
dt
dt
1.50 s to calculate a, b, and c.
d n
t nt n 1
dt
SET UP:
EXECUTE: (a) z (t ) b 3ct 2. z (t ) 6ct. At t 0, a /4 rad and
z b 200 ra
FIRST LAW OF THERMODYNAMICS I
PHYS1112
Lecture 23
Intended Learning Outcomes
After this lecture you will learn:
1)
2)
3)
4)
5)
internal energy of a thermodynamic system
first law of thermodynamics
work done during volume change (pdV work)
isochoric, isob
WORK AND KINETIC ENERGY
PHYS1112
Lecture 5
Intended Learning Outcomes
After this lecture you will learn:
1) energy
2) the meanings of positive and negative work.
3) the Hookes law as an example of a variable force.
4) the work-energy theorem in the gener