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Physical Quantities and Measurements
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Physical Quantities and Measurements
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Physical Quantities and Measurements
Distance of the moon from the earth is
3.84 × 10
3
 m
38.4 × 10
3
 m
3.84 × 10
8
 m
38.4 × 10
8
 m
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Physical Quantities and Measurements
Distances up to several hundred meters are measured by help of a
measuring tapes
meter ruler
Vernier caliper
all of them
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Physical Quantities and Measurements
In SI system the unit for speed is written as
meter
meter/sec
meter/hour
km/sec
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Physical Quantities and Measurements
The international system of units is commonly referred as
SI
ISU
SU
IU
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Physical Quantities and Measurements
Kilo, mega, giga, Milli are the example of
base units
derived units
prefixes
square units
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Physical Quantities and Measurements
The least count of screw gauge is
0.1 mm
0.01 mm
0.2 mm
0.02 mm
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Comment
Physical Quantities and Measurements
All physical quantities are
not measurable
measurable
related to each other
not related to each other
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Physical Quantities and Measurements
The significant digits in 0.058 are
3
4
2
0
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Physical Quantities and Measurements
If someone wants to measure size a of a bacterium, one will measure in
centimeters
millimeter
micrometers
kilometers
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Comment
Physical Quantities and Measurements
1.35 can be rounded to
1.5
1.3
1.4
1.6
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