2- Use scientific notation.
The scientific notation is used to simplify writing very small or very large numbers. For example,
154,000,000,000 can be written in scientific notation as 1.54 × 1011 .
0.000 000 095 can be expressed in scientific notation as 9.5 × 10-8.
Question 4: Suppose you have a very large box. Its length is 2.0×104 m, its width is 3.0×103 m and its height is 1.0×104 m. What is the volume of this box? If the box has a mass of 3.0×1012 kg what is its mass density?
For convenience, symbols are used to replace certain power of 10. The most common ones are listed below
|109||giga-||G||3.5×109 W = 3.5 GW|
|106||mega-||M||5.4×106 W = 3.5 MW|
|103||kilo-||k||6.5×103 W = 6.5 kW|
|10-3||milli-||m||1.5×10-3 W = 3.5 mW|
|10-6||micro-||m||2.0×10-6 W = 2.0 mW|
|10-9||nano-||n||1.2×10-9 W = 1.2 nW|
|10-12||Pico-||p||4.2×10-12 W = 4.2 pW|