What are the basic united?

Answer 1

The fundamental base units are:

Distance: A measure of length (the SI unit is the meter,m)

Mass: A measure of matter (the SI unit is the kilogram, kg)

Time: A measure of duration (the SI unit is the second, s)

Charge: A measure of an objects ability to electrically interact (the SI unit is the coulomb, C)

Temperature: A measure of average particle translational motion in a system (the SI unit is kelvin, K)

Amount of substance: A measure of quantity (the SI unit is the mole, mol)

Luminous Intensity: A measure of the amount of light emitted in a direction per unit solid angle. While one could argue that this is a derived unit, it is still listed as a fundamental unit in the SI system of units (the SI unit is the candela, cd)

Derived quantities are a function of some combination of the fundamental base quantities units listed above. Some derived quantities and their corresponding units include:

Frequency: 1/s

Area: m2

Volume: m3

Velocity: m/s

Acceleration: m/s2

Momentum: kg*m/s

Newton: kg*m/s2

Pressure: kg*m/(s2*m2)

Work: kg*m2/s2

Energy: kg*m2/s2

Power: kg*m2/s3

Voltage: kg*m2/(s2*C)

Resistance: kg*m2/(s*C2)

Capacitance: kg*m2/s2

Inductance: kg*m2/C2