module 2: foundations in physics

• What is the unit for mass?

  Kilogram
• What is the unit symbol for mass?

  kg
• What is the SI standard unit for length?

  Meter
• What is the unit symbol for length?


  m
• What is the SI unit for time?

  Second
• What is the unit symbol for time?

  s
• What is the SI unit for temperature?

  Kelvin
• What is the unit symbol for temperature?

  K
• What is the SI unit for electrical current?

  Amperes
• What is the unit symbol for electrical current?

  A
• What is the SI unit for the amount of substance?

  Mole
• What is the unit symbol for the amount of substance?

  mol
• What is the prefix for tera and its factor?

  Tera, factor of $10^{12}$
• What is the prefix for giga and its factor?

  Giga, factor of $10^{9}$
• What is the prefix for mega and its factor?

  Mega, factor of $10^{6}$
• What is the prefix for kilo and its factor?

  Kilo, factor of $10^{3}$
• What is the prefix for deci and its factor?

  Deci, factor of $10^{-1}$
• What is the prefix for centi and its factor?

  Centi, factor of $10^{-2}$
• What is the prefix for milli and its factor?

  Milli, factor of $10^{-3}$
• What is the prefix for micro and its factor?

  Micro, factor of $10^{-6}$
• What is the prefix for nano and its factor?

  Nano, factor of $10^{-9}$
• What is the prefix for pico and its factor?

  Pico, factor of $10^{-12}$
• How do you convert from millimeters to meters?

  • Multiply by $10^{-3}$
  • Example: 5 mm = $5 \times 10^{-3} \text{ m}$
• How do you convert from nanometers to meters?

  • Multiply by $10^{-9}$
  • Example: 700 nm = $700 \times 10^{-9} \text{ m}$
• How do you convert from meters to nanometers?

  • Divide by $10^{-9}$
  • Example: 5 m = $5 \times 10^{9} \text{ nm}$
• How do you convert from meters to millimeters?

  • Divide by $10^{-3}$
  • Example: 10 m = $10 \times 10^{3} \text{ mm}$
• What are the base units in physics?

  Kilogram, meter, second, kelvin, amp, mole
• What is a derived unit?

  A unit not in the base unit list
• What is the derived unit for frequency?

  Hertz
• What is the base unit for frequency?

  Seconds to the power of minus one
• What is the derived unit for pressure?

  Pascal
• What is the base unit for pressure?

  Kilograms meters to the power of minus two seconds to the power of minus two
• What is the derived unit for work and energy?

  Joule
• What is the base unit for the joule?

  Kilogram meters squared seconds to the power of minus two
• What does a homogeneous equation mean?

  Units on both sides are the same
• What is the difference between accuracy and precision?

  Accuracy is close to real value; precision is close results
• What are random errors?

  Unpredictable errors affecting measurements
• How can random errors be reduced?

  By taking multiple measurements
• What are systematic errors?

  Errors affecting all measurements by the same amount
• What is an example of a systematic error?

  Zero error in a measuring instrument