Units and Measurements- Quantities, units, errors, significant figures and dimensions

Questions discussed

1. Physical Quantities- fundamental, derived and supplementary?

2. Units and system of units?

3. Length- Measurement of large distances and estimation, small distances and range of length

4. Measurement and range of mass

5. Accuracy and precision of instruments

6. Types of errors- systematic, random, least count, absolute relative and percentage errors

7. Combination of errors- sum, difference, product, quotient and power

8. Significant figures

9. Dimension of physical quantities- dimensional formula, dimensional analysis and its application

Types of quantities

1. Physical - quantities that can be measures

2. Non physical - quantities that can't be measured

Physical Quantities

1. Fundamental

2. Supplementary

3. Derived

Length

Measurement of large distances