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General ItemsBreithaupt pages 219 to 239

September 1 st , 2010


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Analogue Micrometer

The micrometer is reading 4.06 0.01 mm


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Analogue Vernier Callipers

The callipers reading is 3.95 0.01 cmNTNU Vernier Applet
http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=52.0http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=52.0


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SI Base UnitsPhysical Quantity Unit

Name Symbol Name Symbol

mass m kilogram kg

length x metre m

time t second selectric current I ampere A

temperature interval T kelvin K

amount of substance n mole mol

luminous intensity I candela cd

SI comes from the French Le Systme International d'Units

Symbol cases are significant (e.g. t = time; T = temperature)
http://en.wikipedia.org/wiki/Andr%C3%A9-Marie_Amp%C3%A8rehttp://en.wikipedia.org/wiki/William_Thomson,_1st_Baron_Kelvinhttp://en.wikipedia.org/wiki/William_Thomson,_1st_Baron_Kelvinhttp://en.wikipedia.org/wiki/Andr%C3%A9-Marie_Amp%C3%A8re


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Derived units (examples)Consist of one or more base units multiplied or divided together

quantity symbol (s) unit

area A m2

volume V m3

density D or kg m-3

velocity u or v m s -1

momentum p kg m s -1

acceleration a m s -2

force F kg m s -2

work W kg m 2 s-2


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Some Greek characters used in physicscharacter name use character name use

alpha radioactivity mu micro& muons

beta radioactivity nu neutrinos

gamma radioactivity pi 3.142

& pi mesons delta very small &

finite changes rho density &

resistivity

epsilon emf of cells sigma summation

kappa K mesons tau tau lepton

theta angles phi work function

lambda wavelength& lambda

particle

omega angular speed& resistance


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Multiples and prefixes

multiple prefix symbol examplex 1000

x 1000 000

x 10 9

x 10 12

x 10 15

x 10 18

also, but rarely used: deca = x 10, hecto = x 100

mega

kilo

tera

giga

exa

peta

M

k

T

G

E

P

M

km

THz

GW

Em

P s


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Smaller multiplesmultiple prefix symbol example

10 100 1000

1000 000x 10 -9

x 10 -12

x 10 -15

x 10 -18

Powers of 10 presentation

centi

deci

micro

milli

pico

nano

c

d

m

p

n

cm

dB

V

m A

pF

nC

atto

femto

a

f

a s

f m
http://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/index.htmlhttp://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/index.html


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Complete:1. There are 5000 mA in 5A

2. There are 8000 pV in 8 nano volts3. There are 500 m in 0.05 cm4. There are 6 000 000 g in 6 000 kg

5. There are 4 fm in 4 000 am6. There are 5.0 x 10 7 kHz in 50 GHz7. There are 3.6 x 10 6 ms in 1 hour8. There are 0.030 M in 30 k 9. There are 4.0 x 10 28 pC in 40 PC10. There are 60 pA in 0.060 nA


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Mathematical signssign meaning sign meaning

> greater than square root< less than < x > mean value

much greater than < x 2 > mean square value

much less than root mean square value greater than or equal to proportional to less than or equal to finite change

approximately equal to extremely small change not equal to sum of equivalent to infinity


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Internet Links Unit Conversion - meant for KS3 - Fendt

Hidden Pairs Game on Units - by KT - Microsoft WORD Fifty-Fifty Game on Converting Milli, Kilo & Mega - by KT - Microsoft

WORD Hidden Pairs Game on Milli, Kilo & Mega - by KT - Microsoft WORD Hidden Pairs Game on Prefixes - by KT - Microsoft WORD Sequential Puzzle on Energy Size - by KT - Microsoft WORD Sequential Puzzle on Milli, Kilo & Mega order - by KT - Microsoft

WORD Powers of 10 - Goes from 10E-16 to 10E+23 - Science Optics & You A Sense of Scale - falstad Use of vernier callipers - NTNU
http://www.walter-fendt.de/m11e/conversion.htmhttp://www.ktaggart.com/physics/Games/PairsGCSEUnits.dochttp://www.ktaggart.com/physics/Games/SelectionMilliKiloMega.dochttp://www.ktaggart.com/physics/Games/PairsMilliKiloMega.dochttp://www.ktaggart.com/physics/Games/PairsPrefixes.dochttp://www.ktaggart.com/physics/Games/PairsMilliKiloMega.dochttp://www.ktaggart.com/physics/Games/SequenceEnergySize.dochttp://www.ktaggart.com/physics/Games/SequenceMilliKiloMega.dochttp://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/index.htmlhttp://www.falstad.com/scale/http://www.phy.ntnu.edu.tw/ntnujava/viewtopic.php?t=69http://www.phy.ntnu.edu.tw/ntnujava/viewtopic.php?t=69http://www.falstad.com/scale/http://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/index.htmlhttp://www.ktaggart.com/physics/Games/SequenceMilliKiloMega.dochttp://www.ktaggart.com/physics/Games/SequenceEnergySize.dochttp://www.ktaggart.com/physics/Games/PairsMilliKiloMega.dochttp://www.ktaggart.com/physics/Games/PairsPrefixes.dochttp://www.ktaggart.com/physics/Games/PairsPrefixes.dochttp://www.ktaggart.com/physics/Games/PairsMilliKiloMega.dochttp://www.ktaggart.com/physics/Games/SelectionMilliKiloMega.dochttp://www.ktaggart.com/physics/Games/PairsGCSEUnits.dochttp://www.walter-fendt.de/m11e/conversion.htm


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Notes from Breithaupt pages 232 & 236

1. Copy table 1 on page 2322. What is the difference between a base unit anda derived unit? Give five examples of derivedunits.

3. Convert (a) 52 kg into g; (b) 4 m 2 into cm 2; (c)6 m 3 into mm 3 ; (d) 3 kg m -3 into g cm -3

4. How many (a) mg in 1 Mg; (b) Gm in 1 TM; (c)s in 1 ks; (d) fV in 1 nV; am in 1 pm?

5. Copy and learn table 2 on page 2366. Try the summary questions on pages 233 &

237

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