P3 : Required Practical 5 Density

Question 1

Regular objects

Answer 1

Regular objects have dimensions which are easy to measure eg with a ruler

Question 2

Irregular objects

Answer 2

With irregular objects, we cannot easily measure their dimensions

Question 3

How do we calculate density of regular objects

Answer 3

. First, determine mass with a balance
. To work out volume, we use a ruler to measure the length of the side
. The volume is length x width x height
. Then divide mass by volume

Question 4

How do we calculate density of irregular objects

Answer 4

. Find the mass of the object using a balance
. Fill Eureka can with water
. Place object into the water, this will cause the water to be displaced and flow out of the can through the spout
. Measure volume of water displaced. This volume is the same volume as the volume of the object
. Divide mass by volume