Chapter 2
Units and measurement
1. The number of significant figures in 0.002305 is .................
2. One kilometre is equal to ............
3. " Relative density is a dimension less quantity " state whether this statement is true or False
4.zero error belongs to.............. category ( personal error/ instrumental error)
5. If force =1×velocity, what is the dimensional formula of n?
6.What is the number of significant number in 200.0?
7. Given force of [F]is given by F= pt -1 +Qt;Wher 't' is time The unit of p is same as that of ..........
8." Kw is unit of energy " check whether this statement is true or False.
9.Given the 'c' is the speed of light. A laser signal send towards the moon return after 't' seconds. The distance of the moon from the observer is ...............
10. Hz= ...........s -1
11. Gravitational potential energy of an object depends on the mass of the object, its height from the surface of earth and acceleration due to gravity . Using the method of dimensions derive an expression for the potential energy
12. Large distance such as distance to planet or star from Earth cannot be measured directly.
i) Name a method used for measuring such distance.
ii) Picture shows the angle subtended by a distant planet 's at two different positions A and B on earth. Write the formula for calculating D
13. The volume v of the liquid crossing a tube is related to the area of cross section A, velocity V and time T
a.Rewrite the equation replacing the quantities with thair dimensional formula
b.if y= 1,find the value of alpha and beta
15.A rectangle has a length of 8.43 cm and breadth 1.212cm
a. Calculate the area of the rectangle rounded to appropriate significant figures.
b. Calculate the perimeter of the rectangle rounded to appropriate
Units and measurement
1. The number of significant figures in 0.002305 is .................
2. One kilometre is equal to ............
3. " Relative density is a dimension less quantity " state whether this statement is true or False
4.zero error belongs to.............. category ( personal error/ instrumental error)
5. If force =1×velocity, what is the dimensional formula of n?
6.What is the number of significant number in 200.0?
7. Given force of [F]is given by F= pt -1 +Qt;Wher 't' is time The unit of p is same as that of ..........
8." Kw is unit of energy " check whether this statement is true or False.
9.Given the 'c' is the speed of light. A laser signal send towards the moon return after 't' seconds. The distance of the moon from the observer is ...............
10. Hz= ...........s -1
11. Gravitational potential energy of an object depends on the mass of the object, its height from the surface of earth and acceleration due to gravity . Using the method of dimensions derive an expression for the potential energy
12. Large distance such as distance to planet or star from Earth cannot be measured directly.
i) Name a method used for measuring such distance.
ii) Picture shows the angle subtended by a distant planet 's at two different positions A and B on earth. Write the formula for calculating D
13. The volume v of the liquid crossing a tube is related to the area of cross section A, velocity V and time T
a.Rewrite the equation replacing the quantities with thair dimensional formula
b.if y= 1,find the value of alpha and beta
15.A rectangle has a length of 8.43 cm and breadth 1.212cm
a. Calculate the area of the rectangle rounded to appropriate significant figures.
b. Calculate the perimeter of the rectangle rounded to appropriate
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