Density

Question 1

What is density?

Answer 1

mass of a substance per unit of volume

Question 2

How would you measure the mass of a regular solid>?

Answer 2

measure it mass using a top pan balance measure its dimensions using vernier calipers or a micrometer

Question 3

How would you measure the density of a liquid?

Answer 3

measure the mass of an empty cylinder

pour some of the liquid into the measuring cylinder and measure the volume of the liquid directly

use as much liquid as possible to reduce the % error

measure the mass of the cylinder w/ the liquid to enable the mass of liquid to be calculated?

Question 4

How would you measure the mass of an irregular solid?

Answer 4

measure the mass of the object immerse the object on a thread in liquid in a measuring cylinder,

observe te increase in the liquid level, this is the volume of the object

Question 5

How would you work out the density of an alloy?

Answer 5

ρ = m / v = (ρ_AV_A + ρ_BV_B) / V