Presentation on theme: "What is Volume Volume is defined as the amount of space taken up by a three-dimensional object."— Presentation transcript:
What is Volume Volume is defined as the amount of space taken up by a three-dimensional object.
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.
Volume of Liquids Reading a Meniscus
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
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
What not to do
Here’s what the cylinder should look like
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 mL = 5.1 mL Therefore, the volume of the object by displacement is 5.1 mL
A penny is a flat cylinder – could calculate the volume by direct measurement.
12 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.
13 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
When are Equal Volumes Not Equal? 100mL 250mL 250 mL
Procedure Ruler “equivalent volume” Measure level of water as each “equivalent volume” is added.