Measurements 18
5. MEASUREMENTS 0F LENGTH, MASS AND TIME
5.1 HOW TO READ SCALES - Meter Ruler
EXERCISE: Measurement of Length - Meter Ruler
Place the brass cylinder on the meter rule scale such that the left end is on the zero line. Record the
following
Physics 1026.
Assignment 4.
Nov.4/5, 2008
1. An object of mass 1 g is whirled in a horizontal circle of radius 0.5 m at a constant
speed of 2 m/s. The work done on the object during one revolution is:
a. 0
b. 1 J
c. 2 J
d. 4 J
e. 16 J
2. A 1-kg block is l
Chapter 1:
MEASUREMENT
1. The SI standard of time is based on:
A. the daily rotation of the earth
B. the frequency of light emitted by Kr86
C. the yearly revolution of the earth about the sun
D. a precision pendulum clock
E. none of these
Ans: E
2. A nano
MeasurementsandUnits
Content:
Chapter1
Section1.21.3
MeasurementsandUnits
Inordertodescribethings,weoftenneedtomeasure them.
WewillonlyusetheInternationalSystemofUnits(SI units)!
Quantity
Unit name
Unit Symbol
length
meter
m
time
second
s
mass
kilogram
kg
Assignment no. 5 (due: October 17, 2013, THURSDAY, 11.59 PM)
Pulling a suitcase
The airline passenger in Figure 1 exerts a constant force F0 on her suitcase (mass m = 10.0 kg)
pulling at = 30o to the horizontal and moving at a constant speed on the floor
Assignment no. 1 (due: Sept 17, 2013, Tuesday, 11.59 PM)
High-Speed rail connection between Toronto and Montreal
High-speed rail connections are extremely successful in a number of countries in the world.
Notably,
Assignment no. 6 (due: October 22, 2013, TUESDAY, 11:59 PM)
Block pulled up by a rough inclined plane
Consider a block of mass m = 3 kg on a rough plane inclined at an angle of = 20. The coefficient of
sliding friction between the block and plane is K = 0
Assignment no. 8 (due: November 5, 2013, Tuesday, 11.59 PM)
Centre of mass of pyridine
Pyridine (C5NH5) is an organic molecule formed by a nearly regular sixfold ring
containing 5 carbon atoms (mass MC = 12 amu *) and one nitrogen atom (mass
MN = 14 amu).
Assignment no. 7 (due: October 29, 2013, Tuesday, 11.59 PM)
A snake on your table
The snake in Figure 1 is at rest on a rough table with friction (static friction coefficient s = 0.6,
kinetic friction coefficient k = 0.4) with his tail hanging over the ed
Assignment no. 3 (due: October 1, 2013, Tuesday, 11.59 PM)
The truck that loses its load
A truck loaded with 10 tree trunks (of mass m = 75 kg each) has an initial total mass m0 = 1750
kg (including the trunks) and proceeds on a straight and uniform road
Assignment no. 4 (due: October 8, 2013, Tuesday, 11.59 PM)
bhA look into the centripetal acceleration of Earth
Because of the centripetal forces due to Earths rotation, a plumb bob might not hang exactly
vertical, along a line orthogonal to the Earth surf
Assignment no. 11 (due: November 16, 2013, Tuesday, 11.59 PM)
The jammed pole
A pole of negligible mass is placed between two concrete walls that are
distant x0 = 200 cm. The system is represented in Figure 1.
a) Assume that the static friction coefficien
Assignment no. 12 (due: December 3, 2013, Tuesday, 11.59 PM)
A journey to the centre of Earth
Consider a hole crossing the Earth from side to side and passing from its centre. Assume that the
acceleration of gravity is zero at the centre of the Earth and
Assignment no. 10 (due: November 19, 2013, Tuesday, 11.59 PM)
Into the well
A solid cylinder of mass M = 5 kg and radius R = 20 cm is mounted on a
frictionless horizontal axle over a well, as shown in Figure 1. A rope of
uniform linear mass density, lm =
Assignment no. 2 (due: Sept 24, 2013, Tuesday, 11.59 PM)
Hunter and Monkey
A hunter with a blow gun wishes to shoot a monkey hanging from a branch as shown in the
figure. The hunter aims right at the monkey at
Section
Subsec Day
Time
Location Student No
1401A -003
x
y
Monday
6.00 -8.00pm PAB 117
Monday
z
TA
PUBUDITHA
6.00 -8.00pm PAB 148
250738610 - 250838763
250838772- 250854774
Monday
6.00 -8.00pm PAB 34
250854846 - 250878502
JIWEN
x
y
z
Tuesday
First Year Physics Laboratory Timetable - 2015-2016
Physics 1401A - Course Section 001/002
Laboratory Section 007
Thursdays - 6:00 pm - 9:00 pm
University OWL site for all courses:
https:/owl.uwo.ca/
Physics 1301 Course OWL site:
Refer to this site for al
Statistical Science 1024
Chapter 5
Regression
Origin of the Term Regression
Francis Galton, 1886,
Regression towards
mediocrity in hereditary
stature. Journal of the
Anthropological Institute,
15: 246 263
See JSTOR under UWO
library databases
Example
Ra
CHAPTER 7:
Exploring Data
Part I Review
Basic Practice of
Statistics
7th Edition
Lecture PowerPoint Slides
Chapter Summarization
Chapter 1
Commented on graphs to display distributions: pie charts and bar
graphs for categorical variables, histograms and st
Statistical Science 1024
Chapter 3
The Normal Distribution
From histogram to density curve
From histogram to density curve
More on Density Curves
a density curve describes the theoretical
pattern or distribution of the data that can
be obtained. The desc
Statistical Science 1024
Chapter 1
Picturing Distributions with
Graphs
Figure 1.1
A spreadsheet displaying data from the American Community Survey, for Example 1.1.
Available at US Census Bureau website.
Individuals and Variables
Any set of data contains
Statistical Science 1024
Chapter 2
Describing Distributions with Numbers
Henry Cavendish (1731 1810)
British scientist
carried out wide-ranging
scientific studies that
included
chemistry
electricity
physics
astronomy
Cavendish Laboratory for
physics at
Statistical Science 1024
Chapter 4
Scatterplots and Correlation
Flipping 10 coins
Different from flipping 1000 coins
Z score
Facilitate comparison
Netflix prize
Scatter Plot
Scatterplot
4
The most useful graph for displaying the relationship between t
Statistical Science 1024
Chapter 6
Two-Way Tables
Describing associations
Two quantitative variables
Scatter plot
Correlation, regression
One quantitative and one categorical
Side by side box plot (histogram)
Conditional mean/sd
Two categorical var
Population, Sample and Sampling Design
The population is the entire
group of individuals that we
want information about
The sample is part of the
population we examine in
order to gather information
The sampling design
describes how to obtain the
sampl