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## Unit 1 Measurement

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**1st Year Physics**Unit 1Measurement**Instruments of Measurement**• Ruler/Meter stick • Stop Clock • Thermometer • Scales • Measuring Cylinder • Opisometer • Trundle wheel • Callipers**Using a Ruler/Metre RuleCan you spot any error being made in**measuring this wire? Task: Use a ruler/meter rule to measure the length and breath of your copy in millimetres (mm)**Opisometer**Task: Use an Opisometer & Ruler to work out the length of a curved line to the nearest cm**Trundle Wheel.**Task: Use a Trundle Wheel to measure the length of the corridor to the nearest metre (m)**Callipers**Task: Use a callipers or a vernier calipers to measure the outside and inside diameter of a beaker in mm**Measuring Mass with a Scales**Mass is the amount of matter in a substance. Unit: Kilogram (kg).**Task: Calculate the mass of the liquid in a beaker in grams**(g)**To measure Temperatures.**Thermometer Unit: Degrees Celsius (oC) Task: Use Thermometer measure the temperature of a beaker of fresh tap water.**Area is the amount of surface that covers an object.**52 mm Area = Length x Breadth A = L x B 36 mm A = 52 mm x 36 mm = 1,872 mm2 Task: Measure the length and breadth of your copy and calculate its area in mm2**Volume is the amount of space taken up by an object.**Volume = length x breadth x height. Example to calculate the volume of a matchbox V = L x B x H 36 mm 52 mm V = 36mm x 52mm x 15mm 15 mm V = 28,080 mm3 Task: Measure the dimensions of a block of wood (or matchbox) and calculate its volume in mm3**To measure the volume of a liquid**Measuring Cylinder Liquid Volume is measured in: Litres (l) or Millilitres (ml)**Meniscus**Read from bottom of the Meniscus**To measure the volume of a small object**Finishing Volume Starting Volume The Increase in Volume is 25 ml So this must be the Volume of the Stone**To measure the Volume of an Irregular Object using an**Overflow-Can Overflow Can Measuring Cylinder Task: Use an overflow-can and measuring cylinder to work out the volume of a stone in ml