SI Units Flashcards: 7 Base Units & 22 Named Derived Units
Practice all 7 SI base units and 22 derived units with special names: quantities, symbols, and base-unit expressions in one installable deck.
Informazioni su questo mazzo
Most SI lists are easy to scan and awkward to recall. These 110 text-only cards turn the complete core into small retrieval tasks: all seven base units and all 22 derived units with special names and symbols.
What the cards practice
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Quantity ↔ unit and symbol: recall each base quantity and every named derived quantity in both directions.
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Named unit ↔ coherent base-unit expression: expand all 22 special names, then reverse the mapping with the quantity supplied whenever an expression is shared.
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Notation and distinctions: keep case, spacing, symbol grammar, Hz/Bq, Gy/Sv, rad/sr, and kelvin/degree Celsius intervals straight.
The deck leaves out prefixes, conversions, non-SI units, unnamed derived units, significant figures, uncertainty, laboratory procedures, historical definitions, defining-constant values, and proprietary exam material. Expression-to-unit prompts always state the quantity, so shared expressions such as s⁻¹ and m²·s⁻² stay unambiguous.
The sequence establishes the seven base units first. It then alternates the 22 named units with a deterministic stride before moving from identity recall to base-unit expressions. Related directions and easy-to-confuse units stay at least three unrelated cards apart; the review scheduler handles longer-term spacing after installation.
Facts were checked against the BIPM SI Brochure, 9th edition, version 4.01 and NIST SP 330 §2, with notation checked against NIST SP 330 §5. The 2026 BIPM edition expresses radian and steradian as unit one; this deck follows that current form. No source prose, third-party deck text, or exam content was copied.
An AI tool helped draft and sequence the cards and generated the cover. Every final front and back was manually checked against the official SI tables. The original questions, answers, selection, sequence, metadata, and cover are shared under CC0 1.0 to the extent those elements can be dedicated; the underlying SI facts remain common knowledge.
Carte in questo mazzo
Carta 1
Domanda
What is the SI base unit for time?
Risposta
second (s).
Carta 2
Domanda
What is the SI base unit for length?
Risposta
metre (m).
Carta 3
Domanda
What is the SI base unit for mass?
Risposta
kilogram (kg).
Carta 4
Domanda
What is the SI base unit for electric current?
Risposta
ampere (A).
Carta 5
Domanda
What is the SI base unit for thermodynamic temperature?
Risposta
kelvin (K).
Carta 6
Domanda
What is the SI base unit for amount of substance?
Risposta
mole (mol).
Carta 7
Domanda
What is the SI base unit for luminous intensity?
Risposta
candela (cd).
Carta 8
Domanda
Which SI base quantity uses the second (s)?
Risposta
Time.
Carta 9
Domanda
Which SI base quantity uses the metre (m)?
Risposta
Length.
Carta 10
Domanda
Which SI base quantity uses the kilogram (kg)?
Risposta
Mass.
Carta 11
Domanda
Which SI base quantity uses the ampere (A)?
Risposta
Electric current.
Carta 12
Domanda
Which SI base quantity uses the kelvin (K)?
Risposta
Thermodynamic temperature.
Carta 13
Domanda
Which SI base quantity uses the mole (mol)?
Risposta
Amount of substance.
Carta 14
Domanda
Which SI base quantity uses the candela (cd)?
Risposta
Luminous intensity.
Carta 15
Domanda
Which SI unit with a special name is used for plane angle?
Risposta
radian (rad).
Carta 16
Domanda
Which SI unit with a special name is used for energy, work, or amount of heat?
Risposta
joule (J).
Carta 17
Domanda
Which SI unit with a special name is used for electric resistance?
Risposta
ohm (Ω).
Carta 18
Domanda
Which SI unit with a special name is used for Celsius temperature?
Risposta
degree Celsius (°C).
Carta 19
Domanda
Which SI unit with a special name is used for dose equivalent?
Risposta
sievert (Sv).
Carta 20
Domanda
Which SI unit with a special name is used for force?
Risposta
newton (N).
Carta 21
Domanda
Which SI unit with a special name is used for electric potential difference?
Risposta
volt (V).
Carta 22
Domanda
Which SI unit with a special name is used for magnetic flux density?
Risposta
tesla (T).
Carta 23
Domanda
Which SI unit with a special name is used for activity referred to a radionuclide?
Risposta
becquerel (Bq).
Carta 24
Domanda
Which SI unit with a special name is used for solid angle?
Risposta
steradian (sr).
Carta 25
Domanda
Which SI unit with a special name is used for power or radiant flux?
Risposta
watt (W).
Carta 26
Domanda
Which SI unit with a special name is used for electric conductance?
Risposta
siemens (S).
Carta 27
Domanda
Which SI unit with a special name is used for luminous flux?
Risposta
lumen (lm).
Carta 28
Domanda
Which SI unit with a special name is used for catalytic activity?
Risposta
katal (kat).
Carta 29
Domanda
Which SI unit with a special name is used for pressure or stress?
Risposta
pascal (Pa).
Carta 30
Domanda
Which SI unit with a special name is used for capacitance?
Risposta
farad (F).
Carta 31
Domanda
Which SI unit with a special name is used for inductance?
Risposta
henry (H).
Carta 32
Domanda
Which SI unit with a special name is used for absorbed dose or kerma?
Risposta
gray (Gy).
Carta 33
Domanda
Which SI unit with a special name is used for frequency?
Risposta
hertz (Hz).
Carta 34
Domanda
Which SI unit with a special name is used for electric charge?
Risposta
coulomb (C).
Carta 35
Domanda
Which SI unit with a special name is used for magnetic flux?
Risposta
weber (Wb).
Carta 36
Domanda
Which SI unit with a special name is used for illuminance?
Risposta
lux (lx).
Carta 37
Domanda
What quantity uses the radian (rad)?
Risposta
Plane angle.
Carta 38
Domanda
What quantity uses the joule (J)?
Risposta
Energy, work, and amount of heat.
Carta 39
Domanda
What quantity uses the ohm (Ω)?
Risposta
Electric resistance.
Carta 40
Domanda
What quantity uses the degree Celsius (°C)?
Risposta
Celsius temperature.
Carta 41
Domanda
What quantity uses the sievert (Sv)?
Risposta
Dose equivalent.
Carta 42
Domanda
What quantity uses the newton (N)?
Risposta
Force.
Carta 43
Domanda
What quantity uses the volt (V)?
Risposta
Electric potential difference.
Carta 44
Domanda
What quantity uses the tesla (T)?
Risposta
Magnetic flux density.
Carta 45
Domanda
What quantity uses the becquerel (Bq)?
Risposta
Activity referred to a radionuclide.
Carta 46
Domanda
What quantity uses the steradian (sr)?
Risposta
Solid angle.
Carta 47
Domanda
What quantity uses the watt (W)?
Risposta
Power and radiant flux.
Carta 48
Domanda
What quantity uses the siemens (S)?
Risposta
Electric conductance.
Carta 49
Domanda
What quantity uses the lumen (lm)?
Risposta
Luminous flux.
Carta 50
Domanda
What quantity uses the katal (kat)?
Risposta
Catalytic activity.
Carta 51
Domanda
What quantity uses the pascal (Pa)?
Risposta
Pressure and stress.
Carta 52
Domanda
What quantity uses the farad (F)?
Risposta
Capacitance.
Carta 53
Domanda
What quantity uses the henry (H)?
Risposta
Inductance.
Carta 54
Domanda
What quantity uses the gray (Gy)?
Risposta
Absorbed dose and kerma.
Carta 55
Domanda
What quantity uses the hertz (Hz)?
Risposta
Frequency.
110 carte
SI Units Flashcards: 7 Base Units & 22 Named Derived Units
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Carta 56
Domanda
What quantity uses the coulomb (C)?
Risposta
Electric charge.
Carta 57
Domanda
What quantity uses the weber (Wb)?
Risposta
Magnetic flux.
Carta 58
Domanda
What quantity uses the lux (lx)?
Risposta
Illuminance.
Carta 59
Domanda
Express the radian (rad) in coherent SI base units.
Risposta
1. The symbol rad keeps the plane-angle context explicit.
Carta 60
Domanda
Express the joule (J) in coherent SI base units.
Risposta
kg·m²·s⁻².
Carta 61
Domanda
Express the ohm (Ω) in coherent SI base units.
Risposta
kg·m²·s⁻³·A⁻².
Carta 62
Domanda
Express the degree Celsius (°C) in coherent SI base units.
Risposta
K. A degree Celsius and a kelvin have the same size; their zero points differ.
Carta 63
Domanda
Express the sievert (Sv) in coherent SI base units.
Risposta
m²·s⁻².
Carta 64
Domanda
Express the newton (N) in coherent SI base units.
Risposta
kg·m·s⁻².
Carta 65
Domanda
Express the volt (V) in coherent SI base units.
Risposta
kg·m²·s⁻³·A⁻¹.
Carta 66
Domanda
Express the tesla (T) in coherent SI base units.
Risposta
kg·s⁻²·A⁻¹.
Carta 67
Domanda
Express the becquerel (Bq) in coherent SI base units.
Risposta
s⁻¹. Use Bq for stochastic nuclear transformations, not periodic phenomena.
Carta 68
Domanda
Express the steradian (sr) in coherent SI base units.
Risposta
1. The symbol sr keeps the solid-angle context explicit.
Carta 69
Domanda
Express the watt (W) in coherent SI base units.
Risposta
kg·m²·s⁻³.
Carta 70
Domanda
Express the siemens (S) in coherent SI base units.
Risposta
kg⁻¹·m⁻²·s³·A².
Carta 71
Domanda
Express the lumen (lm) in coherent SI base units.
Risposta
cd·sr. Since sr has unit one, this is dimensionally cd; sr keeps the solid-angle context explicit.
Carta 72
Domanda
Express the katal (kat) in coherent SI base units.
Risposta
mol·s⁻¹.
Carta 73
Domanda
Express the pascal (Pa) in coherent SI base units.
Risposta
kg·m⁻¹·s⁻².
Carta 74
Domanda
Express the farad (F) in coherent SI base units.
Risposta
kg⁻¹·m⁻²·s⁴·A².
Carta 75
Domanda
Express the henry (H) in coherent SI base units.
Risposta
kg·m²·s⁻²·A⁻².
Carta 76
Domanda
Express the gray (Gy) in coherent SI base units.
Risposta
m²·s⁻².
Carta 77
Domanda
Express the hertz (Hz) in coherent SI base units.
Risposta
s⁻¹. Use Hz for periodic phenomena.
Carta 78
Domanda
Express the coulomb (C) in coherent SI base units.
Risposta
A·s.
Carta 79
Domanda
Express the weber (Wb) in coherent SI base units.
Risposta
kg·m²·s⁻²·A⁻¹.
Carta 80
Domanda
Express the lux (lx) in coherent SI base units.
Risposta
cd·sr·m⁻². Since sr has unit one, this is dimensionally cd·m⁻²; sr keeps the solid-angle context explicit.
Carta 81
Domanda
For plane angle, which named SI unit has the coherent base-unit expression 1?
Risposta
radian (rad).
Carta 82
Domanda
For energy, work, or amount of heat, which named SI unit has the coherent base-unit expression kg·m²·s⁻²?
Risposta
joule (J).
Carta 83
Domanda
For electric resistance, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻²?
Risposta
ohm (Ω).
Carta 84
Domanda
For Celsius temperature, which named SI unit has the coherent base-unit expression K?
Risposta
degree Celsius (°C).
Carta 85
Domanda
For dose equivalent, which named SI unit has the coherent base-unit expression m²·s⁻²?
Risposta
sievert (Sv).
Carta 86
Domanda
For force, which named SI unit has the coherent base-unit expression kg·m·s⁻²?
Risposta
newton (N).
Carta 87
Domanda
For electric potential difference, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻¹?
Risposta
volt (V).
Carta 88
Domanda
For magnetic flux density, which named SI unit has the coherent base-unit expression kg·s⁻²·A⁻¹?
Risposta
tesla (T).
Carta 89
Domanda
For activity referred to a radionuclide, which named SI unit has the coherent base-unit expression s⁻¹?
Risposta
becquerel (Bq).
Carta 90
Domanda
For solid angle, which named SI unit has the coherent base-unit expression 1?
Risposta
steradian (sr).
Carta 91
Domanda
For power or radiant flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻³?
Risposta
watt (W).
Carta 92
Domanda
For electric conductance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s³·A²?
Risposta
siemens (S).
Carta 93
Domanda
For luminous flux, which named SI unit has the coherent base-unit expression cd·sr?
Risposta
lumen (lm).
Carta 94
Domanda
For catalytic activity, which named SI unit has the coherent base-unit expression mol·s⁻¹?
Risposta
katal (kat).
Carta 95
Domanda
For pressure or stress, which named SI unit has the coherent base-unit expression kg·m⁻¹·s⁻²?
Risposta
pascal (Pa).
Carta 96
Domanda
For capacitance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s⁴·A²?
Risposta
farad (F).
Carta 97
Domanda
For inductance, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻²?
Risposta
henry (H).
Carta 98
Domanda
For absorbed dose or kerma, which named SI unit has the coherent base-unit expression m²·s⁻²?
Risposta
gray (Gy).
Carta 99
Domanda
For frequency, which named SI unit has the coherent base-unit expression s⁻¹?
Risposta
hertz (Hz).
Carta 100
Domanda
For electric charge, which named SI unit has the coherent base-unit expression A·s?
Risposta
coulomb (C).
Carta 101
Domanda
For magnetic flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻¹?
Risposta
weber (Wb).
Carta 102
Domanda
For illuminance, which named SI unit has the coherent base-unit expression cd·sr·m⁻²?
Risposta
lux (lx).
Carta 103
Domanda
How are SI unit names capitalized in English?
Risposta
They normally start with a lowercase letter, even when named after a person. Within this deck, the proper-name modifier in degree Celsius keeps its capital C.
Carta 104
Domanda
What determines capitalization in an SI unit symbol?
Risposta
Symbols derived from proper names start with a capital letter; the others are lowercase. Case is mandatory and meaningful.
Carta 105
Domanda
How do SI unit symbols behave in plurals and at sentence endings?
Risposta
They never take a plural ending, and they take no period unless the symbol ends a sentence. Unit symbols are mathematical symbols, not abbreviations.
Carta 106
Domanda
How should a number and an SI unit symbol be spaced?
Risposta
Put a space between them: 25 m and 20 °C. In °C, the degree sign and C stay together.
Carta 107
Domanda
Both hertz and becquerel reduce to s⁻¹. When is each used?
Risposta
Use hertz (Hz) for periodic phenomena and becquerel (Bq) for activity referred to a radionuclide. The shared expression doesn't make the quantities interchangeable.
Carta 108
Domanda
Both gray and sievert reduce to m²·s⁻². What distinguishes them?
Risposta
Gray (Gy) is used for absorbed dose or kerma; sievert (Sv) is used for dose equivalent. The quantity context determines the special name.
Carta 109
Domanda
Radian and steradian both have coherent unit expression 1. What distinguishes them?
Risposta
Radian (rad) is used for plane angle; steradian (sr) is used for solid angle. Their symbols preserve the quantity context.
Carta 110
Domanda
For temperature intervals, how do kelvin and degrees Celsius compare?
Risposta
A change of 1 K equals a change of 1 °C. Their zero points differ, so absolute temperatures aren't numerically equal.
110 carte
SI Units Flashcards: 7 Base Units & 22 Named Derived Units
Nibomo si apre e puoi iniziare a studiare.