Brainscape's Knowledge GenomeTM

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


See full index

Physics GCSE > PAPER 1 unknown things > Flashcards

PAPER 1 unknown things Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards GCSE Religious Studies - Edexcel Route A flashcards AP® Physics flashcards GCSE Religious Studies - Eduqas Route A flashcards GCSE Geography - AQA flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route B flashcards
1
Q

What is the typical human walking speed?

A

1.5m/s

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

What is the typical human running speed?

A

3m/s

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

What is a typical cycling speed?

A

6m/s

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

What is Newton’s first law?

A

If no resultant force is acting upon a stationary object, it will stay at rest, and if upon a moving object, it will remain at a constant velocity.

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

What is Newton’s second law?

A

F=ma

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

What is Newton’s third law?

A

When two objects interact, the force they exert on each other is equal and opposite.

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

What is inertial mass?

A

How difficult it is to change the velocity of an object; the ratio of force over acceleration.

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

Give a typical range for the value of human reaction time.

A

0.2s to 0.9s

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

Why is gas power more advantageous than coal?

A
  • Gas has lower emissions.
  • Gas generation is more flexible as it has quicker start up times and can be switched on and off more readily.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are two environmental impacts of burning fossil fuels?

A
  • Carbon dioxide leads to global warming.
  • Sulphur dioxide leads to acid rain.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How does the human ear work?

A
  • The pinna amplifies the incoming sound waves and directs them into the ear.
  • The sound waves cause the ear drum to vibrate at the same frequency.
  • This is amplified by three small bones (ossicles)
  • The stirrup bone is connected to the cochlea which passes on these vibrations to it.
  • Small hairs on the cochlea detect different frequencies of pitch. These are converted to electrical signals and sent the the brain, which experiences them as sound.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What types of waves are P waves and S waves?

A

P waves: longitudinal
S waves: transverse

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

What is the critical angle?

A

When the angle of refraction is 90º. Past this point, total internal reflection occurs instead.

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

What is meant by specular reflection?

A

When rays are reflected from a smooth surface in a single direction.

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

What is meant by diffuse reflection?

A

When rays are reflected from a rough surface in many directions.

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

What range of wavelengths of electromagnetic waves can the human eye detect?

A

400-700nm

17
Q

What three things can happen when radiation hits an object?

A

It can be:
- Transmitted
- Reflected
- Absorbed

18
Q

What do all objects emit and absorb?

A

Infrared radiation.

19
Q

What is meant by intensity?

A

The energy transferred per unit area.

20
Q

How are radio waves produced?

A

Oscillations in an electrical circuit.

21
Q

How can radio waves create an oscillating current?

A

When absorbed, radio waves can induce oscillations in an electric circuit the same frequency of the waves themselves.

22
Q

What are the uses of radio waves?

A
  • Communication, because they can travel long distances without losing quality.
23
Q

What are the uses of microwaves?

A
  • Shorter range communication at low intensities, cooking food at high as water and fat absorbs them
24
Q

What are the uses of infrared radiation?

A
  • Short range communication
  • Cooking food
25
Q

What are the uses of visible light?

A
  • Illuminating things
  • Cameras
  • Fibre optics
26
Q

What are the uses of UV radiation?

A
  • Sterilising things, as it kills bacteria
  • Sun tanning
27
Q

What are the uses of gamma rays?

A
  • Radiotherapy
  • Sterilising food
28
Q

What is the approximate radius of an atom?

A

1x10⁻¹⁰m

29
Q

How is photographic film used to measure radiation?

A
  • Turns dark as it absorbs radiation
  • Useful for people working in environments with radiation so they can see how much radiation they’ve been exposed to
30
Q

What blocks alpha radiation?

A

A thin sheet of paper; a few centimetres of air

31
Q

What blocks beta radiation?

A

A thin sheet of aluminium; a few metres of air

32
Q

What blocks gamma radiation?

A

A few centimetres of lead; a few metres of concrete

33
Q

What is the name of the currently accepted atom model?

A

The Bohr Model

34
Q

What is activity in radioactive decay?

A

The rate at which nucleuses decay in a substance, measured in Becquerels (decays per second).

35
Q

What is count-rate?

A

Decays per second from a source

36
Q

How do smoke alarms work?

A
  • Alpha is emitted, ionising the air and allowing a current to flow through it.
  • Smoke interferes with the alpha, reducing the current and setting off the alarm.
37
Q

What isotope of Uranium is commonly used in fission?

A

Uranium-235

38
Q

What two isotopes of hydrogen are used in fusion?

A

Deuterium and Tritium

39
Q

Who suggested the Earth was at the centre of the universe?

A

Ptolemy

Physics GCSE (3 decks)

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