P2 Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What are the best conductors

A

Metal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the best insulators

A

Wool and fibreglass like materials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How does thermal conductivity effect the rate of energy transfer through a material

A

The higher the thermal condunctivity of a material, the higher the rate of energy transfer through it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Hiw does the thickness of insulating material effect the rate of energy transfer through it

A

The thicker the layer, the lower the rate of energy transfer through it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How do object interact with infrared radiation

A

All objects emit and absorb infrared radiation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How does heat effect the amount of infrared radiation emitted

A

The hotter the object is, the more infrared radiation the object emits in a given time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How does the temperatire of an object increase

A

If it absorbs more radiation than it emits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does the Earthโ€™s temperatire depend on

A

Absorbtion of infrared radiation from the sun

Emission of infrared radiation from the surface of the Earth and itโ€™s atmosphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the specific heat capacity of an object

A

The amount of energy needed to change the temp of 1kg of the sunstance by 1ยฐC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the equation of specific heat capacity

A

๐Ÿ”บE = m x c x ๐Ÿ”บt

Change in energy = mass x specific heat capacity x change in temp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How does mass effect effect time taken for temperatire to increase

A

The greater the mass of the object, the more slowly its temperature increases when its heated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What appliances can be hsed to heat a house

A

Electric and/or gas heaters
Gas or oil-fired central heating
Solid-fuel stoves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What strategies can be put in place to reduce heat loss from a house (5)

A
Loft insulation
Cavity wall insulation
Double glazed windows
Aluminium foil behind radiators
External walls or thicker bricks and lower thermal conductivity
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is cavity wall insulation

A

Insulation material that is used to fill the cavity between the 2 brick layers of an external house wall

How well did you know this?
1
Not at all
2
3
4
5
Perfectly