weight, mass, density etc

Question 1

What is weight

Answer 1

The force of gravity pulling on a mass - measure in Newton’s

Question 2

What is mass

Answer 2

Mass is the amount of substance - measure in kilograms/grams

Question 3

how do u find what the weight of something is

Answer 3

mass x gravity

Question 4

What is gravity

Answer 4

Force of attraction between masses. It is a property of mass, the bigger the mass the bigger the gravity

Question 5

What is gravity on earth

Answer 5

9.81 Newton’s

Question 6

How do you find the density of an object

Answer 6

Mass divided by volume

Question 7

What happens to water when it is frozen

Answer 7

Expands by 10%

Question 8

What temperature is water at its densest

Answer 8

4°C

Question 9

What is the RD for polythene and what happens to it in water

Answer 9

0.90

Float

Question 10

What is the RD of water

Answer 10

1

Question 11

What is the RD of PVCu and what happens to it in water

Answer 11

1.28

Sink

Question 12

What is the RD of aluminium and what happens to it in water

Answer 12

2.70

Sink

Question 13

What is the RD of cast iron and what happens to it in water

Answer 13

7.90

Sink

Question 14

What is the RD of copper and what happens to it in water

Answer 14

8.90

Sink

Question 15

What is the RD of natural gas and what happens to it

Answer 15

0.6

Rise

Question 16

What is the RD of air

Answer 16

1

Question 17

What is the RD of propane and what happens to it

Answer 17

1.5

Sink

Question 18

What is the RD of butane and what happens to it

Answer 18

2

Sink

Question 19

how do u work out specific heat capacity

Answer 19

specific heat value x kg x temp rise