# Physics - PowerPoint PPT Presentation Download Presentation Physics

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1. Physics Length Time Mass Units and Measurements rifkee1011@gmail.com

2. Mass (Kilogram) Electric Current (Ampere) Time (Second) Basic Quantities Temperature (Kelvin) Ammount of Substance (mol) Length (Metre) Luminous Intensity (Candela)

3. Three Basic Units of SI Units (le Système international d'unités ) • Mass (kilogram) • Length (metre) • Time (second) Length (metre) Time (second) Mass (kg)

4. The metric prefixes

5. The Power of Ten Shorthand The Standard Notation • The speed of light = 300 000 km/s • = 3 x 105 km/s • 5 = 5 x 1 • 50 = 5 x 101 • 500 = 5 x 102 • The diameter of bacteria = 0.002 µm • = 2 x 10-3 µm • = 0.000000002 m • = 2 x 10-9 m • 5 000 000 = 5 x 106 • 0.05 = 5 x 10-2 • 0.0000005 = 5 x 10-7

6. Exercises How many millimeters are there in: 1 cm b) 4 cm c) 0.5 cm d) 6.7 cm e) 1 m What are these length in meter? 300 cm b) 550 cm c) 870 cm d) 43 cm e) 100 mm Write the following as powers of ten with one figure before the decimal point: 100 000 b) 3500 c) 428 000 000 d) 504 e) 27 056 Write the following in full: 103 b) 2 x 106 c) 6.9 x 104 d) 1.34 x 102 e) 2.12 x 105 Write these fractions as power of ten: 1/1000 b) 7/1000 000 c) 21/100 000