Powerpoint topik 1
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Physical quantity is a quantity that has a numerical value and unit of measurement. Base quantities are quantities that cannot be defined in terms of other quantities, and include length, mass, time, current, temperature, amount of substance, and luminous intensity. Derived quantities are quantities that can be obtained and expressed in terms of base quantities or a combination of base quantities, such as velocity, acceleration, force, pressure, energy, power, frequency, volume, and area. Prefixes are used to indicate the multiple or sub-multiple of base units, with common prefixes including kilo, centi, milli, micro, and nano. Conversion between units requires identifying the appropriate conversion factors.
Powerpoint topik 1
- 1. / 11 UNIT AND MEASUREMENT TOPIC 1 (Part 1)
- 2. / 11 Physical Quantity is a quantity that has a numerical value and a unit of measurement. Example : kg Non-Physical Quantities (emotional quantities) Sad, Happy, Anger 2 Kuantiti fizik ialah kuantiti yang mempunyai nilai numerik dan unit pengukuran. 1 by ABA 2
- 3. / 11 Base Quantity is a quantity that cannot be defined in terms of other quantities. Base Quantities SI Unit name SI symbol Length meter m Mass kilogram kg Time second s Current ampere A Temperature Kelvin K Amount of substance mole mol Luminous intensity candela cd Kuantiti asas ialah kuantiti yang tidak boleh ditakrifkan oleh kuantiti lain. 1 by ABA 3
- 4. / 11 Derived Quantity is a quantity that can be obtained and expressed in terms of base quantity or combination of few base quantities. Derived quantities Base Quantities S.I Unit Velocity Length and time ms Acceleration Length and time ms Force Mass, length and time kgms , N Pressure Mass, length and time kgm s , Pa, Nm Energy Mass, length and time kgm s , J Power Mass, length and time kgm2s , W Frequency Time s , Hz Volume Length mm3, cm3 ,m3 Area Length mm2, cm2 ,m2 Density Mass, Length Kg/m3 Work Mass, length and time kgm s , J Weight Mass, length and time kgms , N by ABA 4
- 5. / 11 Conversion of Units (British to SI Unit) 8 ＄ meter = 8 0.3048 1 = 8 0.3048 = 2.44 Coversion Factor : 1 feet = 0.3048 meter by ABA 5
- 6. / 11 Prefix Symbol Power of Ten ato a 10-18 femto f 10-15 pico P 10-12 nano N 10-9 micro 10-6 mili m 10-3 centi c 10-2 deci d 10-1 deka da 10 hekto h 102 kilo k 103 mega M 106 giga G 109 tera T 1012 PREFIX Prefix yang biasa digunakan dan wajar dihafal. by ABA 6
- 7. / 11 1 m = ? cm 1 meter= 102 (102 ) meter 1 meter= 102 centi meter 1 m = 102 cm Contoh : Penggunaan Prefix c = centi (10-2) by ABA 7
- 8. / 11 1 cm = ? m 1 centi meter = ? mili meter 1 (102 ) ＄ = 10(103 ) meter 1 cm = 10 m Contoh : Penggunaan Prefix c = centi (10-2) m = mili (10-3) by ABA 8
- 9. / 11 1 MHz = ? Hz 1 Mega Hz = ? kilo Hz 1 (106 ) Hz = 103(103 ) Hz 1 MHz = 103 kHz Contoh : Penggunaan Prefix M = mega (106) k = kilo (103) by ABA 9
- 10. / 11 Conversion of Units 52 ＄ 2 = 52 2 1 10 3 2 1 km = 10 m 1 m = 10 cm 1 cm = 10 mm 1 hr = 60 min 1 min = 60 s 1 hr = 3600 s HAFALKAN 3 3 3 1 kg = 10 g 1 g = 10 miligram 1 L = 10 mililiter 2 by ABA 10 = 52 4 1 10 2 2 = 5 104 2
- 11. / 11 Conversion of Units 30 ＄ = 30 3 10 1 1 3600 = 30103 13600 = 8.33 Conversion Factor ≠ 3 2 1 km = 10 m 1 m = 10 cm 1 cm = 10 mm 1 hr = 60 min 1 min = 60 s 1 hr = 3600 s 3 3 3 1 kg = 10 g 1 g = 10 miligram 1 L = 10 mililiter by ABA 11
- 12. / 11 Conversion of Units 900 3 ＄ 3 = 900 3 3 1 10 = 9001106 1031 = 9 102 1063 3 3 2 1 km = 10 m 1 m = 10 cm 1 cm = 10 mm 1 hr = 60 min 1 min = 60 s 1 hr = 3600 s HAFALKAN 3 3 3 1 kg = 10 g 1 g = 10 miligram 1 L = 10 mililiter 2 10 1 3 = 9 105 3 by ABA 12