2024 Wk5 Hw

Question 1

Are insulator more Dense or less Dense?

Answer 1

Less Dense

Question 2

Are Conductors good or bad at transferring heat?

Answer 2

Good

Question 3

What is the formula for Energy Efficiency?

Answer 3

Useful Energy(J)/Total Energy Input X 100

Question 4

Why do darker colours heat up faster/more?

Answer 4

Because they reflect less light, they absorb most of the Solar Energy

Question 5

Do Particles vibrate more or less when they are heated up?

Answer 5

More

Question 6

When particles are heated up, do they become more or less dense?

Answer 6

Less

Question 7

What state of Matter is the best conductor?

Answer 7

Solids

Question 8

What State of Matter is the worst at conducting Heat?

Answer 8

Gas

Question 9

The particles move in a perpendicular direction to the direction of the wave. What type of wave is this?

Answer 9

Transverse Wave

Question 10

The particles move parallel to the direction of the wave. What type of wave is this?

Answer 10

Longitudinal Wave

Question 11

The measurement of the wave, peak to peak or trough to trough. What is it called?

Answer 11

Wavelength

Question 12

The measurement of how many peaks or troughs pass through a certain point in a second. What is this?

Answer 12

Frequency.

Question 13

Does a high frequency sound have a low pitch or high pitch?

Answer 13

High

Question 14

Does a Low pitch noise have have a long wavelength or short wavelength?

Answer 14

Long Wavelength.

Question 15

What medium does Radiation work in?

Answer 15

Any Medium

Question 16

What Medium does Convection work in?

Answer 16

Fluids (Gases and Liquids)

Question 17

The force that pushes and electric current

Answer 17

Voltage

Question 18

The measurement of flow of Electrons

Answer 18

Current or Amps or A

Question 19

What is Ohm’s Law Resistance?

Answer 19

Voltage = Current X Resistance

Question 20

A circuit is made up of a battery and 2 light bulbs, they are wired one after the other. What is this called?

Answer 20

A series Circuit

Question 21

A circuit is made up of a battery and 2 light bulbs. The light bulbs are not wired one after the other but on separate branches. What is this called?

Answer 21

This is called a Parallel circuit.

Question 22

What is the formula to find Current or Amps?

Answer 22

Voltage/Resistance

Question 23

What is the formula to find Resistance?

Answer 23

Voltage/Current (or Amps or I)

Question 24

Will a conductor have an almost empty or almost full valence shell?

Answer 24

Almost empty

Question 25

Voltage Formula

Answer 25

V=Current x Resistance

Question 26

What state of matter does sound travel through (fastest to slowest)?

Answer 26

1. Solids
2. liquids
3. Gases

Question 27

Sound travels faster in… because…

Answer 27

hotter objects because the particles are vibrating at higher speeds which causes the sound to travel faster.

Question 28

How do you calculate Wavelength?

Answer 28

λ = wave speed/frequency

Question 29

How do you calculate wave speed?

Answer 29

Speed(m/s)=Frequency(Hz)×Wavelength(m)

Question 30

What are some properties of materials that are conductors (Heat)

Answer 30

They are dense, they are darkly coloured.

Question 31

What is the definition of a wave?

Answer 31

A disturbance that moves through a medium from one location to another.