This document discusses various units and measurements used in science including derived units, angles, length, mass, time, accuracy, precision, error combinations, dimensional analysis and its applications. It also includes worksheets, answers, short questions, and multiple choice questions related to these measurement and analysis topics.

1. UNITS AND MEASUREMENTS

2. Derived units

3. Plane angle and solid Angle

4. Measurement of length

5. Measurement of length

6. Measuring large distance

7. Measuring large distance

8. Measurement of small distance

9. Some special length units

10. Measurement of Mass

11. Measurement of Mass

12. Measurement of Time

13. Range of Time

14. Range of Time

15. Accuracy and precision

20. Combinations of Errors
• If a quantity depends on two or more other
quantities, the combination of errors in the
two quantities helps to determine and predict
the errors in the resultant quantity. There are
several procedures for this.
• Suppose two quantities A and B have values as
A ± ΔA and B ± ΔB. Z is the result and ΔZ is the
error due to combination of A and B.

27. Worksheet

28. Answer key of worksheet

30. Dimensional analysis

31. Dimensions of some common physical quantity

32. Applications of dimensional analysis

33. Uses of Dimensional analysis

34. Uses of Dimensional analysis

35. Uses of Dimensional analysis

36. Limitations of Dimensions

37. Short type question answer

38. MCQ

39. MCQ