lorenzo florendo - reviewer for physics - first monthly test
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ReviewerContents:
Conversion of UnitsSignificant Figures
Algebraic TransformationExercises
More Exercises!!!
Conversionof
Units
What we want
to convert
Answer Unit of whatwe’re converting
Unit of the answer
numerator and denominator
should be equivalent
What we want
to convert
5 kg
5kg g
g
kg
g
numerator and denominator
should be equivalent
1kg = 1x103g = 1000g
1
1000
PMDAS!!!
5000
1024 Yotta (Y) (y) yocto 10-24
1021 Zetta (Z) (z) zepto 10-21
1018 Exa (E) (a) atto 10-18
1015 Peta (P) (f) femto 10-15
1012 Tera (T) (p) pico 10-12
109 Giga (G) (n) nano 10-9
106 Mega (M) (μ) micro 10-6
103 Kilo (k) (m) milli 10-3
102 Hecto (h) (c) centi 10-2
101 Deca (da) (d) deci 10-1
5 kilograms 5(1x103) grams=93 Megameters 93(1x106) meters=
2 picoliters 2(1x10-12) milliliters=
SI prefixes can only be used withSI units without prefixes!
Similar in English. You could not add moreprefix to a word that already has prefix!
inflammableUNNO!!
Similar in English. You could not add moreprefix to a word that already has prefix!
milligramsMegaNO!!
SI prefixes can only be used withSI units without prefixes!
How do you converta Megameter to millimeter?
Megameter
meter
millimeter
Don’t be lazy!!!
It is easier this way!!!
SIG FIGs
1. Ignore leading zeros
0.00675 Sig Fig = 3
2. Ignore trailing zeros, unless they come after a decimal point
45,00094.00Sig Fig = 2
Sig Fig = 4
3. Everything else is significant
23,008,000,0001430.0608Sig Fig = 5
Sig Fig = 8
AlgebraicTransformation
aVf - Vi
t
Deriving equations simply is isolatingwhat we want to make a formula for
For example: We are are deriving an equation in finding t
What do we have to do to isolate t?
We transfer this...
To this side
But how?
aVf - Vi
t
For example: We are are deriving an equation in finding t
Cancel out (Vf – V
i)in this side
aVf - Vi
t
For example: We are are deriving an equation in finding t
Vf - Vi
Vf - Vi
Whatever we do in this sideShould also be donein this side
at
For example: We are are deriving an equation in finding t
Vf - Vi
aVf - Vi
t
How about: finding the equation for Vf
Whatever we do in this sideShould also be donein this side
tt
ta Vf - Vi
How about: finding the equation for Vf
Whatever we do in this sideShould also be donein this side
+ Vi+ Vi
ta Vf
How about: finding the equation for Vf
+ Vi
aVf - Vi
t
How about: finding the equation for Vi
Whatever we do in this sideShould also be donein this side
tt
ta Vf - Vi
How about: finding the equation for Vf
Whatever we do in this sideShould also be donein this side
Vf -Vf -
ta Vi
How about: finding the equation for Vf
Vf -
Exercise!!! >:(
Give the derived equations for the ff.
“Vi”1) 2ad = Vf – Vi
“Tf”2) Q = mc(Tf – Ti)
“v2”3) F = mv2
r
Convert the ff.
14.82 milliliter = ? meters
450 centigrams = ? grams
2.08 yoctometers = ? megameters
4.65 deciseconds = ? centiseconds
0.00053 meters = ? micrometers
More!!! >:(
When a turtle travels at constant speed, the distance covered (d) is directly proportional to the time of travel (t).
If a turtle travels 1.8 kilometers in 1.50 hours, how far will the same turtle travel in 5.50 hours?
speed distancetime
Relationship of variables and derivation
The weight of 54 kg of bananas on Earth weights 83 kg on Planet X. If a turtle weights 4.52 kg on Planet X, how heavy is the turtle on Earth?
Conversion4.52 kg?