1: Write the following numbers in scientific notations 

a. 1234 m                           b. 0.000023 s 
c. 469.3 ｘ10⁸ m                  d. 0.00985 ï½˜10⁷ s


2: Express the following measurements using prefixes 


3: If a boy has an age 15 years 2 months and 10 days, convert his age in 

a. seconds 
b. milli seconds 
c. mega seconds 


4: How many kilometres are there in 25 micrometres?

Ans { 25 ｘ10⁻⁹  km }


5: What are the pitch and least count of

a. Vernier calipers if the smallest division on main scale is 1mm and total divisions on vernier scale are 20.

b. Screw gauge if the smallest division on its main scale is 0.5 mm and its movable scale has 50 divisions.


6: Look at the measurement of Vernier caliper (as shown):

a. What is its main scale reading? 

b. What is its coinciding division on Vernier scale?



7: Look at the figure of screw gauge, let's suppose a small steel ball is placed between its spindle and anvil then:

a. What is its main scale reading? 

b. What is its coinciding division of circular scale?




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