Q21. "The total linear momentum of an isolated system remains constant" It is the statement of

Q22. Which of the following is not a fundamental Physical Quantity?
(A) Velocity
(B) Volume
(C) Length

Q23. _______ is the fundamental physical quantity.

Q24. SI unit of Pressure is ______.

Q25. The unit of frequency in S.I. is__________

Q26. The ratio of of absolute error to the average value, error is called______.

Q27. Which one of the following is a derived quantity?

Q28. Which of the following is a derived physical quanity?

Q29. If the vernier scale lies right of the zero of main scale the error is called______.

Q30. \(1m^{3}\)=__________\(cm^{3}\)