1.1 Use of SI units and their prefixes

• What does SI stand for in Système International d'Unités?

  Standardized system of measurement
• The SI system defines 7 base units that represent the fundamental physical quantities
• The SI system provides a uniform and consistent way to express physical quantities
• The SI system defines 7 base units that represent the fundamental physical quantities
• The standardized base SI units ensure consistency in scientific measurements and calculations worldwide.

  True
• SI prefixes simplify the representation of numbers and help in scaling units for practical use.


  True
• 5 km is equal to 5000 m.

  True
• The prefix 'kilo' has the multiplier 10^3
• 1 μm is equal to 0.001 mm.
• How many meters are in 5 kilometers?

  5000 m
• How many meters are in 5 km?

  5000 m
• What is the base SI unit for temperature?

  kelvin
• The prefix 'kilo' means thousand.
• The prefix 'milli' has the symbol m.
• Match the SI prefix with its multiplier:

  Mega ↔️ 10^6

  Giga ↔️ 10^9

  Centi ↔️ 10^-2

  Milli ↔️ 10^-3
• How many meters are in 1 kilometer?

  1000
• How many millimeters are in 2.5 micrometers?

  0.0025
• What is the current in amperes if it is 20 milliamperes?

  0.02 A
• The SI system defines 7 base units to express fundamental physical quantities
• Match the physical quantity with its SI base unit and symbol:

  Length ↔️ meter, m

  Mass ↔️ kilogram, kg

  Time ↔️ second, s

  Electric current ↔️ ampere, A
• Using SI units helps in accurate calculations and simplifies scientific communication.


  True
• SI prefixes are used in scientific notation to express numbers more conveniently
• To convert between prefixes, you need to understand the multiplier associated with each prefix
• 1 μm is equal to 0.001 mm.
• The prefix 'centi' has a multiplier of 10^-3

  False
• Order the following prefixes from largest to smallest multiplier:

  1️⃣ giga

  2️⃣ mega

  3️⃣ kilo

  4️⃣ milli

  5️⃣ micro

  6️⃣ centi
• 2.5 μm is equal to 0.0025 mm.
• The SI system is used globally in science and technology.


  True
• Base SI units ensure consistency in scientific measurements worldwide.


  True
• 1 mA is equal to 0.001 A


  True
• What is the purpose of SI prefixes in scientific measurements?

  Simplify large or small numbers
• What is the symbol for the prefix "milli"?

  m
• 5 kilometers is equal to 5000 meters.

  True
• Prefix multipliers are essential for converting between SI units in physics calculations.

  True
• The voltage across a 5.2 MΩ resistor with 0.02 A current is 104,000 volts.
• Using SI units ensures clarity and simplifies unit conversions in scientific calculations.

  True
• The standardized base SI units ensure consistency in scientific measurements and calculations worldwide.


  True
• Match the physical quantity with its SI base unit and symbol:

  Length ↔️ meter, m

  Mass ↔️ kilogram, kg

  Time ↔️ second, s

  Electric current ↔️ ampere, A
• Match the prefix with its multiplier and meaning:

  kilo ↔️ 10³, thousand

  mega ↔️ 10⁶, million

  giga ↔️ 10⁹, billion

  milli ↔️ 10⁻³, thousandth
• Match the prefix with its multiplier:

  kilo ↔️ 10³

  mega ↔️ 10⁶

  giga ↔️ 10⁹

  micro ↔️ 10⁻⁶