1-2

1-2 SI base units

An Imgur Image
In the above image it displayed the base units of seven quantities. 

1
2
// The SI unit of force, called the newton (N), is defined in terms of SI base units as:
1 N = 1 kg * m/s^2

SI prefixes

An Image of SI prefixes

  • We can write for example a typical eletrical power plant, 1.3 * 10^9 watts, as 1.3 gigawatts or 1.3 GW
  • Another example we can write a time interval of size of often ecountered in nuclear physics, 2.35 * 10^-9, as 2.35 nanoseconds or 2.35 ns