Physical Quantities

Question 1

What are the 7 base units?

Answer 1

1. mass (kilogram)
2. time (second)
3. length (metre)
4. current (ampere)
5. temperature (kelvin)
6. luminous intensity (candela)
7. amount of a substance (mole)

Question 2

What is needed to define a physical quantity?

Answer 2

Magnitude and a unit

Question 3

Base unit

Answer 3

One of 7 units from which all other units are derived

Question 4

Derived unit

Answer 4

A unit defined in terms of the base units

Question 5

Homogeneous Equation

Answer 5

For an equation to be valid, it is necessary, but not sufficient, for the units on both sides of the equality sign to be the same.