Brainscape's Knowledge GenomeTM

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


See full index

Physics Y9 > CT4 > Flashcards

CT4 Flashcards

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

What does light do?

A

It transfers energy from the source to our eyes. Light is a type of electromagnetic wave.

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

The electromagnetic spectrum

A
  • Gamma ray
  • X ray
  • Ultraviolet
  • Visible light
  • Infrared
  • Microwave
  • Radio wave
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Gamma rays function

A

Used for sterilising medical equipment and food and detection and treatment of some cancers.

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

X ray function

A

Used for medical imaging and airport security scanners.

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

Ultraviolet function

A

Used for sterilising water and killing bacteria. Also used to detect forged bank notes.

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

Visible light functions

A

Used for lighting, photography and fibre optic communications.

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

Infrared functions

A

Used for short range communications, e.g. tv remotes. Also for electrical heaters, cooking food, optical fibres and thermal imaging cameras.

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

Microwave functions

A

Used for satellite communications and cooking food.

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

Radio wave functions

A

Used for radio and tv broadcasting and satellite communications.

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

The PEN table

A

Used to work out the mass, charge and location of the proton, electron and neutron.

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

Electrons discovery

A

Plum pudding model 1904 (Thompson)

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

Nucleus discovery

A

In the centre/positive charge 1913 (Rutherford)

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

What did Chadwick do?

A

He demonstrated the presence of neutrons.

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

What did Bohr do?

A

He discovered the electron shells have set energy levels (2.8.8).

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

What are some commons sources of large amounts of background radiation?

A
  • Bananas
  • Some rocks
  • Radiation from space
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How do Geiger Muller tubes work?

A

GM tubes are connected to a counter that show the number of ions/ionised particles per minute.

17
Q

What are the types of radiation?

A
  • Alpha
  • Beta
  • Gamma
18
Q

Properties of alpha radiation?

A
  • 2 protons plus 2 neutrons (the nucleus of helium)
  • stopped by paper
  • heaviest relative mass
  • positive
  • can travel 5 cm before stopping
  • very strongly ionising.
19
Q

Properties of beta radiation?

A
  • Lighter electron mass (1/1835)
  • Negative
  • Travels 15 cm before stopping
  • Stopped by a few mm of aluminium
  • Strongly ionising
  • 1 electron
20
Q

Properties of gamma radiation?

A
  • Penetrates furthest
  • Can travel several metres
  • It is not a particle (no mass, no charge)
  • It is a wave (pure energy)
  • It is stopped by a few cm of lead only
  • Weakly ionising.
21
Q

Positron

A

The anti-particle to the electron.
* beta radiation can also produce particles with the same mass of an electron but positively charged.

22
Q

What are the 8 energy stores?

A
  • kinetic
  • gravitational potential
  • thermal
  • chemical
  • nuclear
  • elastic
  • magnetic
  • electrostatic
23
Q

What are the 4 energy transfers?

A
  • forces
  • electricity = the movement of charges (electrons/ions)
  • heating
  • radiation
24
Q

When does induced electrostatic charge appear?

A

When a charged object causes the movement of charges in another object (without touching it).

25
Q

What will happen when a charged object is close to another (insulating) object?

A

It will
* attract the opposite charges
* repel the same charges

26
Q

Discharged (earthed)

A

The electrons flow in whichever direction removes excess charge and you become discharged.

27
Q

What is the electrostatic field?

A

The volume of space around a charged object in which another object can experience the electrostatic force.

28
Q

Where do field lines go?

A

Towards negative charge and away from positive charge.

29
Q

What is density?

A

The mass of a certain volume of a substance.

30
Q

What is the formula for density?

A

Density = mass / volume

31
Q

The specific heat capacity

A

The specific heat capacity of material is the amount of energy it takes to increase the temperature of 1kg of substance by 1 degree celsius.

32
Q

The specific latent heat

A

The amount of energy transferred by 1kg of substance changing state

33
Q

What does the thermal energy of an object depend on?

A
  • Its temperature
  • its mass
  • the material

Physics Y9 (3 decks)

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