phy

test 1

What is a physical quantity?

A property that can be measured directly or indirectly, which can be expressed as a physical quantity.

Give examples of physical quantities.

Mass, length, breadth, height, time, volume, density.

List the 7 fundamental physical quantities.

1. Mass

2. Length

3. Time

4. Electric current

5. Thermodynamic temperature

6. Luminous intensity

7. Amount of substance.

What is a derived physical quantity?

A physical quantity which is derived by combining several fundamental physical quantities.

What are the SI basic units?

Units which are used for fundamental physical quantities: meter, kilogram, second, ampere, kelvin, mole, candela.

What are the SI supplementary units?

1. Radian (rad) \n2. Steradian (sr)