B6 Physics

Question 1

What is the equation to calculate density?

Answer 1

Density = Mass (KG) / Volume (Metres cubed)

Question 2

What is the unit that density is measured in

Answer 2

kg/metres cubed

Question 3

What do you use to measure the mass of a solid

Answer 3

An electronic balance

Question 4

What is the formula to measure the volume of a regular solid

Answer 4

Length X Width X Height

Question 5

How to work out the volume of a small irregular solid

Answer 5

You lower it onto a thread into a water filled measuring cylinder and then measure the rise in water levels

Question 6

How do you measure the density of a liquid

Answer 6

Measure the mass of an empty beaker using a balance. Then pour in the water into the beaker and place it back on the balance. Subtract the mass of the empty beaker from the mass of the full beaker

Question 7

What is the formula to calculate the mass of an object (HINT rearrange the previous equation)

Answer 7

Mass = density X volume

Question 8

What is the formula to calculate the volume of an object (HINT rearrange the previous equation)

Answer 8

Volume = Mass / Density

Question 9

When a substance changes state what remains the same?

Answer 9

The number of particles

Question 10

Does the mass of a substance that has changed state stay the same?

Answer 10

Yes

Question 11

What position are the particles in in a solid

Answer 11

A fixed position

Question 12

What can the particles in a liquid do

Answer 12

They can move around at random and are in contact with each other

Question 13

What can the particles in a gas do?

Answer 13

They can move around freely and are far apart (Don’t touch each other)

Question 14

What is one thing that can affect melting or boiling point of a liquid?

Answer 14

Impurities in the water

Question 15

When a substance is changing state what happens to the temperature?

Answer 15

It stays the same

Question 16

What is latent heat?

Answer 16

It is the energy transferred to a substance when it changes state

Question 17

When does evaporation occur

Answer 17

From the surface of a liquid when its temperature is below its boiling point.

Question 18

What is specific heat capacity

Answer 18

The energy required to raise one kilogram of a substance by 1 degree Celsius.

Question 19

What is the formula to find the change in thermal energy

Answer 19

Change in thermal energy = mass X specific heat capacity X temperature change.

Question 20

What happens to the particles of a solid when they are heated

Answer 20

The particles vibrate and eventually break away from the structure (the solid melts)

Question 21

What happens to the pressure of gas when you increase the volume

Answer 21

It decreases

Question 22

What happens to the pressure of gas when you decrease the volume

Answer 22

It increases

Question 23

What is the pressure of a gas on a surface caused by?

Answer 23

The particles of gas repeatedly hitting the surface

Question 24

What is specific latent heat

Answer 24

The the amount of energy required to change the state of 1kg of a substance without changing its temperature

Question 25

What is the formula to find out specific latent heat of fusion

Answer 25

specific latent heat of fusion (J/kg) = energy (Joules) / mass (KG)

Question 26

Rearrange the equation to find the energy transferred to a solid at its melting point

Answer 26

E = M X L

Question 27

What is evidence of the random motion of gas particles

Answer 27

The unpredictable motion of smoke particles