Physics Y9 Density and Pressure EoT test

Question 1

what is density

Answer 1

a measure of the mass of an object per unit volume of that object

Question 2

calculate density

Answer 2

mass/volume

Question 3

how should you put physics answers

Answer 3

Formula, Numbers, Answer, Unit

Question 4

calculate mass

Answer 4

density*volume

Question 5

calculate volume

Answer 5

mass/density

Question 6

what are the main units of mass

Answer 6

gcm⁻³ and kgm⁻³

Question 7

what can you use to measure density of an irregular object

Answer 7

eureka can

Question 8

calculate pressure (2 ways)

Answer 8

heightdensitygravity and force/area

Question 9

what is the gravity of earth

Answer 9

9.8Nkg⁻¹

Question 10

what do Pascal’s vases show

Answer 10

the width and the volume of the medium has no effect, but only the height makes a difference to pressure

Question 11

what is the unit for pressure

Answer 11

Pascals(Pa)

Question 12

how precise should physics answers be

Answer 12

as precise as the least precise number

Question 13

calculate force

Answer 13

pressure*area

Question 14

what is the unit for force

Answer 14

Neutons(N)

Question 15

what happens to an object in fluid if weight = upthrust

Answer 15

it floats

Question 16

what happens to an object in fluid if weight > upthrust

Answer 16

it sinks

Question 17

calculate weight of water displaced

Answer 17

weight of the object displacing it

Question 18

calculate difference in pressure

Answer 18

lengthdensitygravity

Question 19

calculate upthrust

Answer 19

weight of displaced water

Question 20

what happens to an object in fluid if weight < upthrust

Answer 20

it is impossible