Physics

Topics: Vernier scale, Measurement, Orders of magnitude Pages: 26 (3930 words) Published: September 14, 2013
JPN Pahang Physics Module Form 4 Teacher’s Guide Chapter 1 : Introduction To Physics _________________________________________________________________________________________

CHAPTER 1 : INTRODUCTION TO PHYSICS 1.1 Understanding Physics PHYSICS Mechanical Energy

Study of the natural phenomena and the properties of matter.

Heat Energy Light Energy Wave Energy

Solid Liquid Gas

Matter

Energy

states

forms
Electrical Energy

Nuclear Energy

Chemical Energy

Properties of Matter

Relationship with energy

Relationship with matter

Properties of Energy

in the fields

Mechanics

Heat

Wave

Electronics

Properties of matter

Light

Electricity & Electromagnetism

Atomic Physics & Nuclear

1

JPN Pahang Physics Module Form 4 Teacher’s Guide Chapter 1 : Introduction To Physics _________________________________________________________________________________________

1.2

PHYSICAL QUANTITIES any quantity that can be measured by a scientific instrument. A physical quantity is …………………………………………………………………….. Stopwatch, metre rule balance, thermometer, ammeter Examples of scientific instruments:……………………………………………………… etc. A base quantity is a physical quantity which cannot be defined in terms of other physical quantities.

Base quantity 1 2 3

4

Study the following picture and list the physical quantities that can be measured. The list of physical quantities : Height, 1. ………………………………………. mass, 2. ………………………………………. size, 3. ………………………………………. age, 4. ………………………………………. temperature, 5. ………………………………………. current 6. ………………………………………. Power, 7. ………………………………………. Thermal energy 8. ………………………………………. Pressure 9. ………………………………………. battery

5

List of 5 basic physical quantities and their units. Base quantity Length Mass Time Current Temperature Symbol l m t I T S.I. Unit meter kilogram second Ampere Kelvin Symbol for S.I. Unit m kg s A K

6. Two quantities that have also identified as basic quantity. There are: Light intensity candela Amount of substance mol i) …………………………..unit ………….. ii) ………………………. unit ……………..

2

JPN Pahang Physics Module Form 4 Teacher’s Guide Chapter 1 : Introduction To Physics _________________________________________________________________________________________

Standard Form 1 2 3 Standard form = A x 10n , 1 < A < 10 and n = integer simplify the expression of very large and small numbers Standard form is used to …………………………………………………………………... Some physical quantities have extremely small magnitudes. Write the following quantities in standard form : 6.37 x 106 m a. Radius of the earth = 6 370 000 m =…………………………………………………. -31 b. Mass of an electron = 0.000 000 000 000 000 000 000 000 000 000 911 kg 9.11 x 10 kg =………... 3.0 x 10-5 m c. Size of a particle = 0.000 03 m = ……………………………………………………… 7.2 x 10-8 m b. Diameter of an atom = 0.000 000 072 m = …………………………………………... c. 5.5 x 10-7 m Wavelength of light = 0.000 000 55 m = ……………………………………………..

Prefixes represent a large physical quantity or extremely small quantity in 1. Prefixes are usually used to ………………………………………………………………... S.I units. before the unit as a multiplying factor. 2. It will be written …………………………………………………………………………… 3. The list of prefixes : 10

12

Eg : 1 × 10 m 1 Tm = ……………………………………. 12

Tera (T) Giga (G) Mega (M) kilo (k) Hekto (ha) Deka (da) desi (d) centi (c)

10

9

106 10 102 100 10 10
-3 3

10

1

3.6 × 10-3A 3.6 mA = ……………………………………. How to change the unit ; Eg : 1. Mega to nano 1.33 MA = 1.33 × 106 A = 1.33 × 10 6-(-9) nA = 1.33 × 10 -15 nA 2. Tera to micro 1.23 Tm to unit µm unit 1.23 Tm = 1.23 x 10 12m = 1.23 x 10 12 – (-6)m = 1.23 x 10 18m 3. piko to Mega 5456 pA to MA unit 5456 pA = 5.456 x 10 3 + (-12) pA = 5.456 x 10 -9pA = 5.456 x 10 -9 –(6) MA = 5.456 x 10 -15 MA

10-1 10-2

mili (m) micro (µ) nano (n) pico (p)

-6

10-9 10
-12

3

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