30
LECTURE
Vibrations
HarmonicMotion
CHAPTER
14
Sections14.4.214.4.3
TextbookPages
361363
How does the position
of
the object vary with time
?
The experimental answer, with the force
visualized
Please stop the archive and watch
Video 29-30
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Selection of EvenNumbered Problem Solutions
Chapter 19
P19.8
Solution to part (a): We find with Ohms law:
(1)
Solution to part (b): For the lower resistance of wet skin we find accordingly Vmax = 0.16 V. Thus, the
danger of shock is much greater when a pe
Selection of EvenNumbered Problem Solutions
Chapter 18
P18.2
Solution to part (a): Eq. [18.8] gives the potential for a point charge:
(1)
Solution to part (b): The electric potential energy follows from the charge and the potential:
(2)
in which the negat
Selection of EvenNumbered Problem Solutions
Chapter 17
P17.2
Initially, there is no electrostatic force since sphere B doesnt carry a charge. After connecting both spheres,
the mutual repulsion of the mobile positive charges on sphere A leads to a maximum
Selection of EvenNumbered Problem Solutions
Chapter 14
P14.2
This is an application of Hookes law:
(1)
in which the force in the stress term F/A is given by the weight of the person. We are asked to calculate the
absolute change in length, l, which is par
Physics Lecture 1: The Ideal Stationary Fluid, Pascals Law
Chapter 12, 12.1-12.2.2 (294-298)
Ideal Stationary Fluid
Four model conditions (assumptions)
o Incompressible is not compressible, density is constant
o Deformable excludes solids, only includes l
Physics Lecture 6: Bernoullis Law
Chapter 13 (13.2.3) 327-330
Bernoullis Law
Additional features of a fluid flowing through a constriction: pressure change
(Venturi meter)
We study: Work needed to change the kinetic energy of the yellow fluid element
o
1.
Physics Lecture 2: Applications in the Life Sciences Atmosphere, Oceans, and
Blood Pressure
Chapter 12, 12.2.2 12.2.3 (297-300)
Example
What is the pressure at 10m below the ocean surface?
o We use Pascals law in the form
g
kg
seawater 1.025 3 1.025 3 3
Physics Lecture 9: Poiseuilles Law, Ohms Law
Chapter 13 (sections 13.3.3-13.3.4) 332-334
Velocity Profile in Cylindrical Tube
Poiseuilles Law
Represents the volume flow rate through a tube
It allows us to define flow resistance R
With
o
(Ohms Law)
Physics Lecture 4: Surface Energy and Surface Tension, Laplaces Law
Chapter 12 (12.4-12.5) pg. 306 311
Formation of surface requires energy
o
o Define surface energy : = energy increase/ increase in surface
Why then is also called surface tension?
With
,
Physics Lecture 7: Newtonian Fluids; Viscosity
Sections 13.3-13.3.2 (330-332)
What Happens in the Real World?
Equation of continuity + Bernoullis Equation
Flow Resistance is due to Viscosity
Fext
A, v, 1/y Fext = nA(v/y)
n is viscosity coefficient with un
Physics Lecture 5: Motivation the Cardiovascular System, Equation of Continuity
Chapter 13 (13.1-13.2.2) 320-327
Anatomical Data for the Systemic Circulation
Contribution to the Blood Flow Resistance
Flow in Tubes
We introduce concepts for fluids in tubes
Phys102 Physics for Life Sciences I
Lecture 1
Course Info
Instructor: Michael Chen
http:/www.sfu.ca/~mxchen Course webpage
Office hours (P9442): MWF 11:30am-12:00noon; Fri. 4:00-5:00PM.
Tutorials: Mandatory (starting next week May 14-16)
Grading
Week
Selection of EvenNumbered Problem Solutions
Chapter 13
P13.2
Solution to part (a): We use the equation of continuity in the form:
(1)
in which the index con refers to the constricted section of the pipe. The second equation we use is Bernoullis
equation i
Selection of EvenNumbered Problem Solutions
Chapter 12
P12.2
First we consider the diver at a depth of 7.0 m below the water surface without the snorkel tube. The external
pressure on the divers body is given by Pascals law. We assume a fresh water lake w
31
LECTURE
TwoExamples
ADangerousToy
CHAPTER
14
incl.ProblemP14.19
TextbookPages
369370
Example 1
An object with mass 1 kg on a frictionless horizontal
surface is attached to the end of a horizontal spring with
k = 100 N/m. The object is displaced 1 m to
32
LECTURE
ChemicalBonds:
HarmonicOscillatorModel
CHAPTER
14
Section14.4.4
TextbookPages
363365
Specific molecule we are studying: HCl
Repulsive force
Attractive force
H+ is electrically attracted to
Cl.
H+ cannot penetrate Cl
(Born).
Specific molecule we
33
LECTURE
PendulumMotion
Walking
Motion of legs while walking
Modeling the leg motion with a pendulum
Please stop the archive and watch
Video 29-33
Then return to the current recording
Simple pendulum: treat in analogy to spring
system
1. Force concept (
11
LECTURE
Motivation:WaterandLifeonEarth
CHAPTER
17
TextbookPages
420422
EVIDENCE OF LIQUID W
High-resolution imagery
from the Mars Global
Surveyor includes a view
of Nanedi Valles, a
canyon about 2.5 km wide
that etches a cratered
plateau. Remarkably, t
Chapter 3: Solutions for Review Problems
Section 3.1
1)
a)
b)
2)
a)
Rate = -
[O 2 ]
1 [H 2 ]
1 [H 2 O]
= =
t
2 t
2 t
Rate = -
1 [ClO3 ]
1 [ClO 4 ]
[Cl ]
=
=
4
t
3
t
t
For A + B
products, Rate = k[A]x[B]y
To evaluate x, keep [B] constant and vary [A]; use
Chapter 2: Solutions for Review Problems
Section 2.1
1) a) In Cr2O72, Cr is in the +6 oxidation state. Cr+6 has been reduced to Cr3+, gaining 3 electrons.
In C2O42, C is in the +3 oxidation state. In CO2, C is in the +4 oxidation state.
The C has been oxi
Western University
Department of Physics and Astronomy
First Year Physics Laboratory
Physics 1029B Physics for the Biological Sciences I
Physics 1029-650-Distance Education
Laboratory Course Outline - Term 2 (Winter) 2014 - 2015
1. Laboratory Component of
Physics 1029B
Date: Rehearsal Only
Academic Year 2013/2014
FINAL Part III Supplement
Part III contains 10 questions, each worth 1 mark (right answer) or 0 marks (wrong answers).
Question 51:
You completed six laboratories in P1029B. This supplement
touche
The following property does not characterize
an ideal stationary fluid:
PM
incompressible We do “01-h; .
. - . u . u “ ‘ ‘ ' \ V 7— ta. fl 7 ,-
stationary when in mechanical equrlibrium epth is measured_&°—fwlrr.:~a\_
densrty increases linearly With dept
Physics Lecture 9: Physiology Applications
Chapter 13 (Section 13.3.7) 337-339
Example
The pulmonary artery, which connects the heart to the lungs, has an inner radius
of 2.6 mm and is 8.4 cm long. If the pressure drop between the heart and the lungs
is 4
Physics Lecture 12 Electric Force, Coulombs Law
Chapter 17 (17.1-17.1.2) 422-424
Coulomb (1784)
Characterize charge by the force which charges exert on each other
F
q1, q2, 1/r2 attractive or repulsive
q1 2 0
q
F k 2 r
r
Coulombs law force with magnitude