GRADE ELEVEN PHYSICS

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GRADE ELEVEN PHYSICS SPH 3U(G) MR.
MOORS Rodney.Moors_at_ocdsb.ca PICK UP A TEXTBOOK
and CD TEXTBOOK - 80 CD - 10 Student email
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Physics is the original science that studies the
physical world. It used to be known as natural
philosophy. Today it is mostly concerned with the
behaviour and structure of matter. The study of
physics often leads to mathematical
relationships. These relationships are useful
because they describe the nature of matter and
they allow the accurate prediction of future
events. PHYSICS IS MATHEMATICAL. PHYSICS CAN BE
ABSTRACT, YOU MUST THINK. PHYSICS DEMANDS HARD
WORK.
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• SAY THE F-WORD OR ABOVE??????
• (I decide what is above or below, e.g. the s-word
  is below)
• THREE CHOICES
• DO TEN PUSH-UPS
• DO TWENTY CRUNCHES
• SING IM A LITTLE TEAPOT (with proper actions) IN
  FRONT OF CLASS
• (this could also be foisted upon you in the
  halls!!)

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KEEP THIS ROOM CLEAN AND NEAT!!!! -put away
equipment -throw out garbage and recyclables
properly -all are expected to pitch in -if we
cannot do this restrictions will follow
All due dates, notes, assignments, labs, etc. can
be found at moorsscience.wikispaces.com
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Using a Calculator Do the following calculations
by pressing your calculator as few times as
possible.
The physics in this course is challenging but 90
of the difficulties arising in solving physics
problems come from small math mistakes (what I
call little math). When difficulties arise the
first thing to do is look over every step of your
calculation or have someone else look it over.
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SIGNIFICANT DIGITS Two types of quantities are
used in science exact values and measurements.
Exact values include defined quantities (1 kg is
1000 g) and counted values ( 12 donuts).
Measurements are not exact because they always
include some degree of uncertainty. A measurement
is made up of numbers that are certain and one
digit, the last one that is estimated or
uncertain. Digits that are part of the
measurement are significant while digits that are
not part of the measurement are insignificant. A
few rules will help distinguish this
statement. -all non-zero digits and in-between
zeroes are significant -zeroes in front of all of
the non-zero digits are insignificant -zeroes
behind all of the non-zero digits and behind the
decimal point are significant
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-zeroes behind all of the non-zero digits but
before the decimal may be significant or
insignificant (assume significant unless you know
where the estimated value of the measurement
actually is) -use scientific notation to show how
many significant digits are present
40025 360.20 0.00450 2600 2600.0 850000 12401 0.00
007
4.0025 x 104 3.6020 x 102 4.50 x 10-3 2.6 x
103 2.6000 x 103 8.5 x 105 1.2401 x 104 7 x 10-5
5 5 3 2-4 5 2-6 5 1
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Calculations and Significant Figures Performing
the actual calculation and tracking significant
figures is the only real way to ascertain the
number of significant figures that make up the
correct answer. Whenever an estimated value is
part of a calculation the number it produces is
estimated. Simplified rules have been developed
to make these calculations easier.
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Adding and Subtracting When adding and
subtracting, the answer should be precise to the
same number column as the most imprecise number
in the calculation. Multiplying and
Dividing When multiplying and dividing, the
answer should have the same number of significant
digits as the number in the calculation which has
the fewest significant digits.
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The rules and procedures you have seen apply to
measured values. They will be utilized in lab
write-ups or in other lab based evaluations where
indicated. On tests, quizzes or assignments you
have a choice. You can perform calculations
following the rules above or you can simply
always use four significant figures and only 4
significant figures. You must let me know at the
beginning of assignment if you are using the four
significant figure method. homework complete
significant figures worksheet
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UNIT CONVERSION The metric system will be used in
this unit so conversions with prefixes will be
performed. The units of time also often need to
be converted.
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Convert the following measurements to the units
stated. -express answer in scientific
notation -express answer to 4 significant digits
(round properly) a) 6.42 km to m b) 1478 s to
hr c) 52.3 km/hr to m/s d) 34.5 Mm to mm e)
45.9 nm to km f) 79 m/s to km/hr g) 45.6
km/hr2 to m/s2 h) 0.239 m/s2 to km/hr2 go over
unit scale and conversion
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• Answers
• 6.420 x 103 m b) 4.106 x 10-1 hr
• c) 1.453 x 101 m/s d) 3.450 x 1013 mm
• e) 4.59 x 10-11 km f) 2.844 x 102 km/hr
• g) 3.519 x 10-3 m/s2 h) 3.097 x 103 km/hr2

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REARRANGING EQUATIONS Rearrange the following
equations so that the letter indicated is
isolated on the left hand side of the equals
symbol.
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a)
g)
n
W
b)
W
h)
t
r
c)
Dd
d)
x
i)
e)
R
j)
f)
r2
v2