Lesson 1 | SI Units

• What is the mass of the Earth in standard form?

  6x10²⁴ kg
• What are the important powers of ten to remember in engineering?

  • Pico: P x10^-12
  • Nano: n x10^-9
  • Micro: μ x10^-6
  • Milli: m x10^-3
  • Kilo: k x10³
  • Mega: M x10⁶
  • Giga: G x10⁹
• How do you convert 6 kV to volts?

  6000 V
• What is the conversion of 34 MV to volts?

  34000000 V
• Convert 328 mV to standard form in volts.

  328 x 10^-3 V
• What is 893 μV in standard form?

  893 x 10^-6 V
• Convert 364 mm to meters in standard form.

  364 x 10^-3 m
• What is the conversion of 98 cm to meters?

  98 x 10^-2 m
• Convert 459 nm to meters in standard form.

  459 x 10^-9 m
• What is 28.7 μm in meters?

  28.7 x 10^-6 m
• How many base SI units are there?

  7 base units
• Why are base SI units important in physics?

  They help form equations correctly
• What is the SI unit for length?

  Meter
• What is the SI unit for luminous intensity?

  Candela
• What is the SI unit for time?

  Second
• What is the SI unit for temperature?

  Kelvin
• What is the SI unit for charge flow (current)?

  Amper
• What is the SI unit for mass?

  Kilogram
• What is the formula for force?

  F = ma
• What is the unit for force?

  Newton
• What is the base SI unit for force?

  kgms^-2
• What is the unit for area?

  m²
• How do you find the base SI units for velocity?

  v = displacement/time
• What is the base SI unit for gravitational potential energy?

  kgm²s^-2
• What is the formula for kinetic energy?

  KE = ½ mv²
• What is the formula for work done?

  W = Fs
• What is the formula for instantaneous power?

  P = Fv
• What is the formula for average power?

  P = W/t
• What is the formula for pressure?

  P = F/A
• What is the power of ten for micro?

  x10^-6
• What is the power of ten for mega?

  x10⁶
• What is the power of ten for kilo?

  x10³
• What is the power of ten for milli?

  x10^-3
• What is the definition of relative error in engineering measurements?

  Absolute error/true value
• What is the SI unit for pressure?

  Pascal
• How do you convert Pascal to base SI units?

  1 Pa = 1 kgm^-1s^-2
• What is the conversion of Watt to base SI units?

  1 W = 1 kgm²s^-3
• What is the unit for kinetic energy?

  Joule
• What is the unit for density?

  kgm^-3
• What is the unit for friction force?

  Newton