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Physical Quantities and Measurements
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Physical Quantities and Measurements
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Physical Quantities and Measurements
To measure small lengths such as the diameter of a wire, the thickness of a metal sheet, etc. We use
physical balance
screw gauge
Vernier calipers
stop watch
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Physical Quantities and Measurements
An instrument which gives a level of high accuracy than mechanical watch is
electronic stopwatch
stop clock
pendulum clock
hour glass
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Physical Quantities and Measurements
The significant figures in 0.00580 are
3
2
1
0
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Physical Quantities and Measurements
Most of the technologies throughout the world are related to
chemistry
biology
mathematics
physics
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Physical Quantities and Measurements
To measure the time interval of an event, we use
screw gauge
physical balance
Vernier calipers
stop watch
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Physical Quantities and Measurements
An average speed of an aero plane is equal to
300m/s
100m/s
500m/s
50m/s
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Physical Quantities and Measurements
In screw gauge a thimble around its one end has
50 divisions
250 divisions
100 divisions
10 divisions
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Physical Quantities and Measurements
Digits other than zero are always
estimated figures
crossed figures
non-significant figures
significant figures
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Physical Quantities and Measurements
In screw gauge, around one end the thimble has
100 divisions
10 divisions
20 divisions
50 divisions
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Physical Quantities and Measurements
The least count of Vernier calipers is
0.01 mm
0.1mm
0.01 cm
1 cm
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