Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics > P1 Revision > Flashcards

P1 Revision Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

poop

A

poopeee

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

What is a good surface to absorb infrared radiation?

A

Black surfaces.

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

What is a good surface to reflect infrared radiation?

A

Silver surfaces.

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

Definition of Infrared Radiation.

A

Infrared radiation is a type of electromagnetic radiation, which involves waves rather than particles. This means that, unlike conduction and convection, radiation can even pass through the vacuum of space. This is why we can still feel the heat of the Sun, although it is 150 million km away from the Earth.

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

What is convection?

A

Heat can be transferred from one place to another by convection.

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

How does conduction occur in metals?

A

The ions are packed closely together and they vibrate continually. The hotter the metal, the more kinetic energy these vibrations have. This kinetic energy is transferred from hot parts of the metal to cooler parts by the free electrons.

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

Three examples of solids.

A

Steel, plastic and wood.

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

What are the particles like in a solid.

A

Closely together and arranged in regular rows.

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

Why can’t solids be squashed?

A

The particles are so close together they have nowhere to move.

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

Three examples of liquids.

A

Mercury, petrol and water.

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

What are the particles like in a liquid?

A

Closely together but arranged in a random way.

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

How does convection occur in liquids?

A

Liquids and gases are fluids because they can be made to flow. The particles in these fluids can move from place to place. Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy.

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

What is evaporation?

A

When water droplets turn into water vapour.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why can liquids flow and take the shape of the bottom of their container.

A

The particles can move around each other.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Three examples of gases.

A

Air, helium and chlorine.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the particles like in a gas?

A

Far apart and in a random way.

17
Q

What is condensation?

A

When water vapour turns into water droplets.

18
Q

How does evaporation happen?

A

The particles in a liquid have different energies. Some will have enough energy to escape from the liquid and become a gas. The remaining particles in the liquid have a lower average kinetic energy than before, so the liquid cools down as evaporation happens. This is why sweating cools you down.

19
Q

How does condensation happen?

A

The particles in a gas have different energies. Some may not have enough energy to remain as separate particles, particularly if the gas is cooled down. They come close together and bonds form between them. Energy is released when this happens. This is why steam touching your skin can cause scalds: not only is the steam hot, but energy is released into your skin as the steam condenses.

20
Q

What affects the rate of evaporation and condensation?

A

The rate of condensation increases if the temperature of the gas is decreased. On the other hand, the rate of evaporation increases if the temperature of the liquid is increased.

21
Q

What evidence is there for the Big Bang Theory?

A

The evidence for the Big Bang consists of galaxies moving away from the earth. The evidence fpr this is the Doppler effect which means that light moving away from an observer appears to be lower in frequency. So, the galaxies are shifting towards the low frequancy, red end of the spectrum, which means the galaxies are moving away from the earth.

22
Q

What is the second piece of evidence for the Big Bang?

A

The cosmic microwave background radiation (CMBR) is another form of evidence for the Big Bang. CMBR is explained as being left over heat from the Big Bang. As the Universe exploded, it cooled and the radiation was stretched out. Today this radiation is in the microwave region of the electromagnetic spectrum.

23
Q

What are waves?

A

Waves are vibrations that transfer energy from place to place without matter (liquid, solid and gas) being transferred.

24
Q

What is conduction?

A

Heat is thermal energy. It can be transferred from one place to another by conduction.

Physics (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions