1.4. Density
A subsection of Physics, 5054, through 1. Motion, forces and energy
Listing 10 of 54 questions
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. (not to scale) The student measures the mass of the sheet and obtains the value 0.12 g. State what is meant by mass. The student is told that the density of the plastic is 0.91 g / cm3. Calculate the volume of the plastic sheet. volume = The student measures the length and width of the sheet. The readings obtained are: length of sheet = 3.0 cm width of sheet = 2.0 cm Calculate the thickness of the sheet. thickness = State a measuring instrument that can be used to measure the thickness of the sheet accurately.
5054_s16_qp_21
THEORY
2016
Paper 2, Variant 1
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Equal volumes of metal, water and air are heated from 20 °C to 80 °C. State whether the metal, the water or the air expands the most. is a diagram of the metal at 20 °C. The metal is a large, square sheet with a square hole at its centre. The sheet lies flat on a table. hole On , draw the outline of the sheet and of the hole after the metal is heated. Make sure that the expansion is noticeable. The metal has a mass of 5.0 kg and a density of 7.5 × 103 kg / m3. Define density. Calculate the volume of the metal. Give your answer to a suitable number of significant figures. volume =
5054_s18_qp_22
THEORY
2018
Paper 2, Variant 2
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A student records the mass and volume of two irregular objects, one made of iron and the other of copper. The student uses the equipment shown in . measuring cylinder cm3 350 g Table 1.1 shows the results obtained. Table 1.1 mass / g volume / cm3 iron copper Describe how to determine the volume of an irregular object with the measuring cylinder. Calculate the density of iron. density = A third object, which is also made of copper, has the same volume as the iron object. Calculate the mass of this copper object. mass = State and explain what happens to the density of the iron object when it is heated.
5054_s19_qp_22
THEORY
2019
Paper 2, Variant 2
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Questions Discovered
54