Density

Question 1

what is the equation for density

Answer 1

the equation for density is p=m/V

p is is Greek letter Rho
m is Mass
V is volume

Question 2

what Is upthrust and when does it occur

Answer 2

upthrust is the force that keeps the object afloat.

it occurs when an object’s density is lower than the density of the water

Question 3

what does the ‘Law Of Displacement’ state

Answer 3

the law of displacement states that an object fully submerged in a fluid will replace an amount of fluid equal to its own volume

Question 4

what is the unit for density

Answer 4

the unit for density is kg/m3

Question 5

what is the unit for mass

Answer 5

the unit for mass is kg

Question 6

what is the unit for volume

Answer 6

the unit for volume is m3

Question 7

If mass is 10 kg and volume is 2.5 metres cubed, what is the density of the object?

Answer 7

4kg/m3

Question 8

what instrument can be used to measure the mass of an object

Answer 8

a balance scale

Question 9

volume displaced is equal to what

Answer 9

volume of crown

Question 10

how do you calculate the density of irregular shaped objects

Answer 10

1) For solids, we can use the Law of Displacement to estimate its volume.
2) This is done by using a displacement can, or a graduated measuring cylinder.
3) The volume of the water that flows out the can and into the cylinder is measured, and this is the volume of the object.

Question 11

how do you calculate the density of liquids

Answer 11

1) For measuring the density of liquids, place a measuring cylinder on a balance and set the reading to zero.
2) Pour the liquid into the cylinder and write down its mass and volume. Then calculate the density.

Question 12

you can measure volume using what 2 apparatus

Answer 12

1) Measuring Cylinder

2) Displacement Can

Question 13

density is the measure of what?

Answer 13

density is the measure of how concentrated an objects mass is