Available practice: 73 of 75 marks. Parts 7(a) await marking support. Scores cover available parts only. Theory Paper 2: Section A is compulsory and Section B offers a choice of two questions. Four published mark-scheme discrepancies across the two variants are held from automatic marking.
(a)(i)Fig. 3.1 shows a thin sheet of plastic. A student tries to measure the thickness of the sheet with a ruler, but the sheet is too thin to measure accurately. The student measures the mass of the sheet and obtains the value 0.12 g. State what is meant by mass.
Answer guidance
State A short answer. No explanation is needed, and adding one cannot earn extra marks.
[1 mark]
(a)(ii)A plastic sheet has mass 0.12 g and density 0.91 g/cm³. Calculate its volume, in cm³.
Answer guidance
Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.
[2 marks]
(a)(iii)The plastic sheet has volume found from its mass 0.12 g and density 0.91 g/cm³. Its length is 3.0 cm and width 2.0 cm. Calculate its thickness, in cm.
Answer guidance
Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.
[2 marks]
(b)Name a measuring instrument that can accurately measure the thickness of the thin plastic sheet in Fig. 3.1.
Answer guidance
State A short answer. No explanation is needed, and adding one cannot earn extra marks.
[1 mark]
5054/21/M/J/16Cambridge O Level Physics 5054 · May/June 2016 · Paper 2 variant 1 · Question 3