Foundations of Physics

• True or false? When drawing scale diagrams to determine resultant vectors, the two vectors should be drawn tip to tail

  True
• What is the SI unit of temperature?

  Kelvin, K
• Give the SI base units for these Quantities.


  mass - kg

  length - m

  time - s

  Current - A

  Amount of substance - mol
• What does an error bar on a graph show?

  An error bar shows the uncertainty in a measurement by showing the range the measurement is likely to lie in
• What is calibration?

  Testing the accuracy of a measuring device