Physics topic 2 density

Question 1

states of matter

Answer 1

solid, liquid, gas

Question 2

Attractions of atoms in solids, liquids, gases

Answer 2

solid atoms have strong forces this is why solids have fixed shapes (imp to know that solid atoms vibrate!!)
Liquids have weaker attractions
Gases have the weakest attractions

Question 3

In high density objects, the practices are (tightly packed/more far apart)

Answer 3

tightly packed

Question 4

density = ….

Answer 4

mass/volume

Question 5

Density formula in symbols

Answer 5

ρ (rho) =m/v

Question 6

How to find volume when we have mass and density

Answer 6

V=m/ρ
Eg. V= 536g/9 g/cm3

Question 7

how to find mass when we have volume and density

Answer 7

ρxv=m
Eg. 11g/cm3 x 3 =m

Question 8

to find the density of a regular object we need to do V=x_x

Answer 8

LxBxH

Question 9

to find the density of an irregular object we find the mass using a _____ and the volume with a _______ or ______

Answer 9

digital balance
displacement/eureka can or measuring cylinder

Question 10

how to find density of a liquid

Answer 10

1. find mass of an empty measuring cylinder on a digital balance
2. pour eg. 100ml of liquid in to the cylinder and find the mass again
   3.calculate the mass by subtracting the final and initial mass.
3. note the volume of liquid and calculate the density

Question 11

materials that are denser then the liquid will (sink/float). if their density is less than the liquid they will (sink/float)

Answer 11

sink
float

Question 12

density of water

Answer 12

1000 kg/m3