Topic - Key Concepts

Question 1

What are the 6 basic SI units

Answer 1

LENGTH - metre (m)
MASS - kilogram (kg)
TIME - second (s)
CURRENT - ampere/amp (A)
TEMPERATURE - kelvin (K)
AMOUNT OF A SUBSTANCE - mole (mol)

Question 2

What are the 9 derived SI units

Answer 2

FREQUENCY - hertz (Hz)
FORCE - newton (N)
ENERGY - joule (J)
POWER - watt (W)
PRESSURE - pascal (Pa)
ELECTRIC CHARGE - coulomb (C)
ELECTRIC POTENTIAL DIFFERENCE - volt (V)
ELECTRIC RESISTANCE - ohm (Ω)
MAGNETIC FLUX DENSITY - Tesla (T)

Question 3

Explain how to convert between the prefixes

Answer 3

GIGA - prefix G = 10^9 X1000 000 000
MEGA - prefix M = 10^6 X1000 000
KILO - prefix G = 10^3 X1000
CENTI - prefix c = 10^-2   /100
MILLI - Prefix m = 10^-6    /1000
MICRO - prefix p (weird p) = 10^-6    /1000 000
NANO - Prefix n = 10^-9    /1000 000 000