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GCSE: Units Dr J Frost (jfrost@tiffin.kingston.sch.uk) Last modified: 13 th April 2015 GCSE Revision Pack Ref: 157, 158, 160

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GCSE Specification 157. Convert between units of measure in the same system. (NB: Conversion between imperial units will be given, metric equivalents should be known.) 158. Know rough metric equivalents of pounds, feet, miles, pints and gallons: Metric/Imperial Convert between imperial and metric measures 160. Convert between metric units of speed eg km/h to m/s (Using revision pack reference numbers)

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Imperial & Metric Length Mass Capacity Pints MetricImperial Metres Miles Litres kg Feet Inches Tonnes Miles Gallons Pounds Stone

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You need to memorise these for your GCSE exam! ? ? ? ? ? 5.4kg = 11.88 pounds 49.69 pints = 28.394 litres 40km = 25 miles 75cm = 2.5 foot Test Your Understanding ? ? ? ? 30 miles = 48 km 28km = 17.5 miles 480 miles = 768 km ? ? ?

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Memorise Time! ? ? ? ? ? ? ? ? ? ?

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30m/s 0.03 km/s 1000 ? 108 km/h × 3600 ? ? ? Converting between compound units 65m/s 234 km/h ?

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175 m/s 630 km/h ? Test Your Understanding 45km/h 12.5 m/s ?

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Exercises 1 2 3 5 6 7 ? ? ? ? ? ? ? 4 [Edexcel] Emily is driving in France. She sees this sign. Emily is going to drive to Dijon. She plans to drive at an average speed of 50 miles per hour. Work out how long it should take Emily to drive to Dijon. To experiment to see if cats land on their feet, I release Pippin upside down at the top of a 6000 foot drop. What is that in km? 1.8km The average human consumes about 7.6 pints of cow’s milk a day. How many litres is that in a year? 1585.1 litres If my Ferrari consumes 6 gallons of petrol each hour and my Aston 8 gallons each hour, what is the difference in time in seconds, between the two cars, to consume a litre of petrol? 33.3 seconds 6 hours ? ? ? ? 8

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