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Published byEthel Gardner Modified about 1 year ago

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Internal 3 Credits DO NOW: Read The ping-pong balls on page 167.

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How would you calculate the volume of all four balls? Length of cardboard tube, in terms of r? Expression for the volume of space inside the tube (hint: think about r)? Volume of empty space inside tube when balls are in it? Write down the ration of all four balls to volume of air inside the tube outside balls? If we have 3 balls, how does the ration change?

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Go to page 167 and do the following exercises individually: 1, 3, 6 and 13

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Get into teams to do the next set of exercises. One person needs to record the answers and another need to present if called on. Complete exercise 13.04 on page 169.

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How many forms can H 2 O take? Solid volume in cm 3 or m 3 Liquid volume usually measured in mL, L or kL. Use term capacity to describe the volume of liquid in a container.

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When we talk about volumes of liquids we often use the word capacity, rather than volume. 1 cm 3 holds 1 mL 1000 cm 3 holds 1000 mL 1000 cm 3 holds 1 L Also 1 m 3 holds 1 kL (= 1000L) The basic unit of capacity is the litre (L). 1 litre (L) = 1000 millilitres (mL) 1 kilolitre (kL) = 1000 litres (L) 1 ml of water weighs 1 gm Note: Usually use small letters for metric units like mm or cm but exception is L for litres so that we do not confuse it with the number 1.

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Lawnmower fuel tank shown right. Calculate capacity in mL. How many times can it be filled using 5 L can of petrol? Volume = 15x10x5 = 750 cm 3 1 cm 3 = 1 mL Volume = 750 ml Number of times = 5000 mL / 750 mL = 6.6 times Round to 6 times.

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Do the following exercises (14.01 pg 173): 1, 3, 5, 6, 8, 12, 15, 17

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