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
LIFS 1902
Prof. C. Liangs Lecture 5
Chapter 24
Chromosomal Basis of
Inheritance
I-II. Chromosomes and gene linkage
III. Sex-Linked inheritance
IV-V. Chromosome number and structure
changes (Aneuploidy) in genetic diseases
I. Chromosomes
Chromosomes
When
PHYS1112 Fall 2016 Test 2 Exercise
MC questions from Spring 2013 Midterm past paper:
1.
A square metal plate 0.20 m on each side is pivoted about an axis through point
O at its center and perpendicular to the plate (figure below). What is the
magnitude of
PHYS1112 Fall 2016 Test 2 Exercise
Solution Part 2
Short Questions:
1.
A uniform wire is bent into the shape shown in the figure below. Find the
moment of inertia about an axis passing through the center of mass and
perpendicular to the plane of the ring.
PHYS1112 Fall 2016 Test 2 Exercise
Solution Part 1
MC questions from Spring 2013 Midterm past paper:
1.
A square metal plate 0.20 m on each side is pivoted about an axis through point
O at its center and perpendicular to the plate (figure below). What is
Name: _ Student ID: _
(SURNAME, Given Name)
The Hong Kong University of Science and Technology
Department of Chemistry
CHEM 1020 General Chemistry IB
Assignment 1
Due on 13th October 2016 (Thursday) at 17:00
Fall 2016-2017
/ 50 points
- Print this Assignm
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
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
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 (
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 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 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 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 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 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 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 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 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