Foundations Of Physics

• Seven SI base units:

  Mass - kg

  Length - metre

  Time - seconds

  Temperature - K (kelvin)

  Current - Amperes , A

  Amount of substance - mols
• Tera, T - 10^12
• Giga, G - 10^9
• Mega, M - 10^6
• Kilo, k - 10^3
• Deci, d - 10^-1
• Centi,c - 10^-2
• Mili, m - 10^-3
• Micro - 10^-6
• Nano, n - 10^-9
• Pico, p - 10^-12
• accuracy is how close you are to the real value
• Precision is how close the results are to each other
• Random error is unpredictable:

  Will affect the gradient of a graph
• To reduce the effect of random errors take multiple measurements
• Prefix to no prefix - multiply

  No prefix to prefix - divide
• Systematic error will affect all measurements by the same amount

  -Will not affect the gradient of the graph but displace it
• Absolute uncertainty of a data set = half of the range
• Absolute uncertainty = smallest scale
• % uncertainty = absolute uncertainty/value x 100
• percentage uncertainty in gradient = best gradient - worst gradient/best gradient x 100