21905 Demonstrate knowledge of trade calculations and ...

4.3 The difference between mass and weight is demonstrated. Range demonstration includes calculations and an explanation. 4.4 Quantity values are re-stated using different SI prefixes. Range for instance – 2049 mm = 2.049 m, 0.055 mm = 55 μm, 234 Pa = 0.234 kPa. ................
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