45 S C I E N C E A N D T H E C I N E M A . Sometimes science is an important element in films or TV series. Therefore, it is not unusual for people from the world of science to advise on specific scientific situations. Here are some examples. Film / Series Adviser 2001: A Space Odyssey (1968) Arthur C. Clarke Autómata (2014) Concepción Monje Breaking Bad (2008-2013) Donna J. Nelson Interstellar (2014) Kip Thorne Form a workgroup to: a) Add another film or TV series with scientific content to the table. b) Search for information about each of the advisers. · What do they do? · What was their job on the film or TV series? · Were they an unnecessary expense? · Did they make the project more of a success? c) Discuss whether we can learn about science by watching films. Measurement 46 Some units are named after people. Their symbols have a capital letter. Look at these examples: joule – newton – curie – pascal – kelvin a) Search for information about these units. Prepare a report explaining what each unit measures and the person it is named after. b) Do you think there is an equal number of men and women in the sciences? Did men and women have the same opportunities in science? 47 Write the amounts in the sentences below with their corresponding symbol. Then write them in scientific notation with the appropriate power of 10 and SI base unit. a) A powerful laser increases the temperature of water from 0 °C to 100 000 °C in 75 femtoseconds. b) Large blocks of stone were used to construct the Great Pyramid of Cheops. Their total mass is an estimated 6 teragrams. 48 A garden snail moves at 14 mm/s. Write its speed in km/h and in scientific notation. S O LV E D P R O B L E M 9 Order the following densities from the highest to the lowest value: 2.7 kg/L 1 270 kg/m3 13.6 g/mL To compare the amounts, they will need to be written in the same units. For example, in kg/L. 1 270 kg/m3 in kg/L 1. Look up the equivalent values of the units: L dm dm m L m 1 1 1 10 1 10 3 3 3 3 3 3 = = = - - 3 2. Use this to make the conversion factor. Then simplify the units: ? . m kg m kg L m L kg 1 270 1 270 1 10 1 27 3 3 3 3 = = - 13.6 g/mL in kg/L 1. Look up the equivalent values of the units: 1 kg = 103 g 1 mL = 10-3 L 2. Use this to make the conversion factor. Then simplify the units: ? ? . . . mL g mL g g kg L mL L kg 13 6 13 6 10 1 10 1 13 6 3 3 = = - Order the densities in kg/L and in the original units: 13.6 kg/L > 2.7 kg/L > 1.27 kg/L 13.6 g/mL > 2.7 kg/L > 1 270 kg/m3 Note that the value of the density in g/mL is the same as in kg/L. c h e c k yo u r p r o g r e s s 32
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