Pages from 606020456-Physics-for-Cambridge-IGCSE-Coursebook-David-Sang-Third-Edition-1.pdf

 1 Making measurements 2 A stack of paper contains 500 sheets of paper. cm 3 cm 3...

 1 Making measurements 2 A stack of paper contains 500 sheets of paper. cm 3 cm 3 100 100 The stack has dimensions of 0.297 m x 21.0 cm x 50.0mm. a What is the thickness of one sheet of paper? b What is the volume of the stack of paper in cm3? Figure 1.7: Measuring volume by displacement. Quantity Units length metre (m) 1 decimetre (dm) = 0.1m 1 centimetre (cm) = 0.01m 1 millimetre (mm) = 0.001 m 1 micrometre (µm) = 0.000 001m 1 kilometre (km) = 1000m volume cubic metre (m3) 1 cubic centimetre (cm3) = 0.000 001m3 1 cubic decimetre (dm 3) = 0.001 m3 Table 1.1: Some units of length and volume in the SI system. I KEY EQUATION Questions 1 The volume of a piece of wood which floats in water can be measured as shown in Figure 1.8. a Write a paragraph to describe the procedure. b State the volume of the wood. cm3 cm3 80 80 70 60 water steel block wood Figure 1.8: Measuring the volume of an object that floats. 5 >