Physics Class 9 | Numerical Problems | Chapter 1 Physical Quantities & Measurements | NBF

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Q4. Solve the questions given below.
1- Write the following numbers in scientific notations
a. 1234m b. 0.000023s c. 469.3×〖10〗^5 m d. 0.00985×〖10〗^7 s

2- Express the following measurements using prefixes
a. 27.5×〖10〗^(-10) m b. 0.00023×〖10〗^(-2) m

3- If a boy has age of 15 years 2 months and 10 days, convert his age in
a. seconds b. milli seconds c. mega seconds

4- How many kilo meters are there in 25 micrometers?

5-What is 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 0.5mm 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?
c. Calculate total reading on the vernier caliper suppose?

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 coinciding division of circular scale?
c. Calculate the total diameter of the ball?
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