RP density

Question 1

equipment

Answer 1

-30cm ruler
-digital balance
-regularly shaped objects
-irregularly shaped objects
-displacement can
-measuring cylinders
-beakers
-liquid (solution)

Question 2

method-regular

Answer 2

1. measure the length, width and height
2. calculate volume by multiplying measurements of length, width and height
3. measure the mass of the object by using the balance
4. calculate density using the equation p=m/v
5. convert units to kg/m³

Question 3

method-irregular

Answer 3

1. measure the mass of the irregularly shaped object
2. fill the displacement can with water, placing a beaker under the spout to collect excess water
3. once the water has stopped dripping, place a measuring cylinder under the spout and place the object in the can
4. measure the volume of water in the cylinder-this is equal to the volume of the object
5. calculate density using p=m/v
6. convert units to kg/m³

Question 4

method-liquid

Answer 4

1. measure the mass of the empty measuring cylinder
2. pour 100cm³ of the liquid into the beaker
3. measure the combined mass of liquid and measuring cylinder
4. calculate the mass of liquid by subtracting the measuring cylinder mass from total mass
5. calculate density using p=m/v
6. convert units to kg/m³

Question 5

safety

Answer 5

1. glassware
2. water-slipping/spillages

Question 6

density equation, include units

Answer 6

p=m/v
kg/m³, kg, m³

Question 7

what must you do to the balance and why?

Answer 7

zero it before placing object on, to avoid a zero error

Question 8

how do you convert from g/cm³ to kg/m³

Answer 8

x1000

Question 9

how does the density of solids and liquids compare?

Answer 9

solids are more dense than liquids as their particles are more closely packed meaning there is mass per unit volume

Question 10

variables

Answer 10

independent-object
dependent-mass, volumes
control-displacement can, equipment