p1.2.1 density

Question 1

what is density?

Answer 1

a measure of the amount of mass per unit volume

Question 2

what is the equation for density?

Answer 2

density=mass/volume

Question 2

what is the equation for mass?

Answer 2

mass=volume x density

Question 3

what is the equation for volume?

Answer 3

volume=mass/density

Question 4

what is the unit for density?

Answer 4

g/cm^3

Question 5

what is the unit for mass?

Answer 5

g

Question 6

what is the unit for volume?

Answer 6

cm^3

Question 7

exam question-density
calculate the density of a liquid of mass 400g and volume 0.0005m^3

Answer 7

0.4/0.0005=800kg

Question 8

exam question-mass
calculate the mass of a block of gold of volume 0.76m^3. gold has a density of 19300kg/m^3

Answer 8

19300x0.76=14668kg

Question 9

exam question-volume
calculate the volume of 1x10^3kg mass of air. air has a density of 1.225kg/m^3

Answer 9

100/1.225=816kg

Question 10

what does 1m^3=?

Answer 10

1x10^6cm^3

Question 11

how to calculate the density of an irregular shape?

Answer 11

-get the mass of the object
-put some water in a graduated cylinder
-find the final volume of water
-find volume of object
-get density of the object by doing mass divided by volume

Question 12

how to calculate the density of a regular shape?

Answer 12

-find length, width and height of shape
-find volume by l x w x h
-do mass divided by volume to find density

Question 13

state 3 materials of low density?

Answer 13

liquids, gases and Styrofoam

Question 14

state 3 materials of high density?

Answer 14

gold, osmium and platinum

Question 15

why are solids denser than gases?

Answer 15

because the particles are packed closely together

Question 16

exam question-length and volume
calculate the length of each side of a cube given a volume of 100cm^3

Answer 16

side length
v=X x X x X
100=X^3
cubed root of 100=X=4.6416