What is Volume Volume is defined as the amount of space taken up by a three-dimensional object.
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Transcript of What is Volume Volume is defined as the amount of space taken up by a three-dimensional object.
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What is Volume
• Volume is defined as the amount of space taken up by a three-dimensional object.
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Volume often refers to liquid volume, which is defined as the amount of space taken up by a liquid, which spreads completely to fill its container.
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Volume of LiquidsReading a Meniscus
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Measuring Volume by Displacement
• Used for irregular shaped objects
• Select a graduated cylinder large enough to put the object in
• Add water - at least 10 mL and record accurately
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• SLOWLY add the object to be measured:
rubber stopper
slug
metal cylinder• Read the new level of the
water• The water will rise an
amount equal to the volume of the object
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What not to do
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Here’s what the cylinder should look like
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Do the math
1 . Original reading of volume
2. Final volume of water
3. This will equal the volume of the object
• 22.5 mL - 17.4 mL = 5.1 mL
• Therefore, the volume of the object by displacement is 5.1 mL
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A penny is a flat cylinder – could calculate the volume by direct
measurement.
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Value of Error in Minting Pennies
•How close the individual volumes are to each other •Calculate as follows
% error = average volume - actual volume actual volume
% error = error in minting the pennies
•The smaller the %error, the better the precision in making of the pennies.
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Example:
% error in minting pennies = average volume - actual volume actual volume
% error in minting pennies = 1.2g - 1.4g 1.4g
= 0.14 X 100% = 14 %
So there is a 14% error in minting of these particular pennies
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When are Equal Volumes Not Equal?
100mL 250mL 250 mL
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ProcedureRuler
“equivalent volume”
Measure level of water as each “equivalent volume” is added.