Year 11 Physics

2010Mr. Howard Graham

And Mr. Ben Saunders

BASIC EXPECTATIONS

•Be On time•Be Prepared•Be Respectful•Be Honest•Try!!!

Lab Safety• No Bags in the Lab• Listen Carefully and follow

instructions• Walk, Don’t Run• Communicate with those

around you• Keep noise to a minimum• Use common sense

2010 Outline

• Semester 1:• Statics and Dynamics• Nuclear Physics

• Semester 2: • Sound and other waves• Electricity and Electronics

Assessment Techniques in Senior Physics

• Supervised Assessment (SA) – Unseen• Usually an Exam

• Extended Research Task (ERT)• Individual research responding to a question

• Extended Experimental Investigation (EEI)

• Group or individual experiment design and investigation

• Supervised Assessment (SA) – Seen• Usually an exam or essay responding to stimulus

2010 Assessment•Term 1 – SA•Term 2 – ERT•Term 3 – EEI•Term 4 - SA

PhotosBalloon Rockets

Dreamworld Trip

The Great Physics Egg Toss

A Quick Challenge…

Ans: 4.2517

STATICS AND DYNAMICSIntro

• Why is measurement so important?eg. Shoe size, distance to the beach, time it takes for this lesson to finish.

• List five things in your daily life that involve measurement?

• List five units of measurement.

UNITS OF MEASUREMENTHumans have always been curious about and concerned with the world around them. Physicists are required to make very careful and accurate observations and measurements of physical quantities so that they can analyse results and compare them against a theory.An internationally agreed system of units was developed to standardise measurements. This is the SI system (abbreviated from Système International d'Unités). Note, some other countries still use imperial units eg. pounds, gallons, etc.

SI Units

Prefixes of the SI Unitstera 1012 Tgiga 109 Gmega 106 Mkilo 103 kdeci 10-1 dcenti 10-2 cmilli 10-3 mmicro 10-6 nano 10-9 npico 10-12 pfemto 10-15 fatto 10-18 a

Difference = 5Therefore 1 decimetre = 1 x 105 micrometres= 105 m

…or 1 micrometre = 1 105

decimetres= 10-5 dm

Alternative methodtera 1012 Tgiga 109 Gmega 106 Mkilo 103 kdeci 10-1 dcenti 10-2 cmilli 10-3 mmicro 10-6 nano 10-9 npico 10-12 pfemto 10-15 fatto 10-18 a

Convert decimetres to micrometres:Difference: -1 - -6 = 5

Therefore: 1 decimetre = 1 x 105 micrometres= 105 m

To go the other wayDifference: -6 - -1 = -5

Therefore: 1 micrometre = 1 x 10-5 decimetres= 10-5 dm

Try these:

1. Convert 3.75dL into L

2. Convert 2.4 μm into m

3. Convert 3.6 x 104 mg to kg

4. Convert 60 km h-1 into m s-1

5. Convert 100 m s-1 into km h-1

Remember…• Next Lesson:

• Be On Time • Be Prepared• Be Respectful• Be Honest• Try!!!