Aim: An Aim: An Introduction to Introduction to

PhysicsPhysics

Units This YearUnits This Year

Math ReviewMath ReviewKinematicsKinematicsEnergyEnergyElectricityElectricityMagnetismMagnetismWavesWavesLight Light ModernModern

Estimating nearest order of Estimating nearest order of magnitudemagnitude

Human LifespanHuman Lifespan

70 years (round to nearest base 10)70 years (round to nearest base 10)

100 years100 years

101022 years yearsWidth of your fingernailWidth of your fingernail

1 cm (no need to round)1 cm (no need to round)

1010-2-2 m m

Height of a 12 story building (each story is Height of a 12 story building (each story is about 10 meters)about 10 meters)

120 meters120 meters100 meters100 meters

101022 meters meters

UnitsUnitsInternational System of Units (SI)International System of Units (SI)Fundamental SI units:Fundamental SI units:QuantityQuantity SI UnitSI Unit SI symbolSI symbol

MassMass kilogramkilogram kgkg

LengthLength metermeter mm

TimeTime secondsecond ss

Electric CurrentElectric Current ampereampere AA

Amount of Amount of SubstanceSubstance

molemole molmol

TemperatureTemperature kelvinkelvin KK

Derived UnitsDerived Units

time

distancespeed

s

mspeed

Common SI ComparisonsCommon SI Comparisons

Head of a pin = 2 mmHead of a pin = 2 mmWidth of pinky = 1 cmWidth of pinky = 1 cmHeight of doorknob, distance Height of doorknob, distance

between outstretched arms = 1 between outstretched arms = 1 metermeter

Height of 1 story = 10 mHeight of 1 story = 10 m

1 liter of water = 1 kg1 liter of water = 1 kgSmall person = 50 kgSmall person = 50 kgFootball player = 100 kgFootball player = 100 kg

Duration of a heartbeat at rest Duration of a heartbeat at rest = 1 second= 1 second

Current flowing into a computer = 1 Current flowing into a computer = 1 ampamp

Maximum current to household device Maximum current to household device = 10 amps= 10 amps

Water freezes at 273 Kelvin, boils at Water freezes at 273 Kelvin, boils at 373 Kelvin373 Kelvin

Room temperature is about 300 KelvinRoom temperature is about 300 Kelvin12 grams of Carbon-12, or the number 12 grams of Carbon-12, or the number

of carbon atoms in the ‘lead’ of a of carbon atoms in the ‘lead’ of a pencil = 1 molpencil = 1 mol

Pages for Additional ReadingPages for Additional Reading

Page 18-19, 27Page 18-19, 27