MEASUREMENTS. IMPORTANCE OF MEASURMENT QUANTITATIVE INFORMATION IS MORE USEFUL THAN QUALITATIVE...
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Transcript of MEASUREMENTS. IMPORTANCE OF MEASURMENT QUANTITATIVE INFORMATION IS MORE USEFUL THAN QUALITATIVE...
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MEASUREMENTS
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IMPORTANCE OF MEASURMENT
QUANTITATIVE INFORMATION IS MORE USEFUL THAN QUALITATIVE (DESCRIPTIVE) INFORMATION.
QUANTITATIVE INFORMATION GIVES SPECIFIC INFORMATION.
QUALITATIVE INFORMATION
QUANTATIVE INFORMATION
GIVE ME LITTLE WATER. GIVE ME 200ml OF WATER.
GIVE ME SOME MONEY. GIVE ME 20 RUPEES.
I ATE SUFFICIENT FOOD. I ATE 2 CHAPATTIS.
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IDENTIFY QUANTITATIVE & QUALITATIVE INFORMATION….
1) WE GOT GOOD YIELD OF CROP. ___________________
2) WE GOT 5 QUINTALS OF RICE. ___________________
3) THIS YEAR THERE IS ENOUGH RAIN. ____________________
4) THIS YEAR WE GOT 500mm RAIN. ____________________
5) THIS CONSTRUCTION NEEDS LOT OF CEMENT. ____________________
6) THIS CONSTRUCTION NEEDS 5 BAGS OF CEMENT. __________________________
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MEASURING UNIT AND IT’S PARAMETERS
PARAMETER BRITISH UNIT SI UNITS
WEIGHT POUND KILOGRAMS
VOLUME GALLON LITERS
DISTANCE YARD, MILES, INCHES METERS
TIME SECOND SECOND
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INTERNATIONAL STANDARD UNITSBASE UNITS-
SIMPLE MEASUREMENTS FOR TIME, LENGTH, MASS, TEMPERATURE, ELECTRIC CURRENT AND LIGHT INTENSITY.
DERIVED UNITS-MADE UP OF BASE UNITS, COMBINATION OF UNITS.
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Meter & its multiple unitsmicrometer = 10-6 m
mm = 0.001 mcm = 0.01 mmeter Decameter = 10 mHectometer = 100 mKilometer = 1000 mMega meter = 106 m
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Derived unitsNAME SYMBOL
LENGTH METER M
MASS GRAM Gm
TIME SECOND S
ELECTRIC CURRENT
AMPERE A
TEMPERATURE DEGREE CENTIGRADE
0C
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SPEED
DISTANCE
TIME
DERIVED UNITS ARE CALCULATED AS FOLLOWS:
UNIT OF SPEED
= ?
SPEED = DISTANCE / TIME
SPEED = M / S
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AREA OF SQUARE = LENGTH * BREADTH
A [SQUARE]
LENGTH
BREADTH
UNIT OF AREA = ?UNIT OF AREA = M * M = M 2
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DERIVED UNITS & THEIR SYMBOL NAMES DERIVED QUANTITY NAME SYMBOL
AREA SQUARE METER m2
VOLUME CUBIC METER m3
SPEED, VELOCITY METER PER SECOND
m/s
ACCELERATION METER PER SECOND
m/s2
DENSITY MASS PER VOLUME Kg/ m3
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CONVERT FOLLOWING:
50cm = _________m5.5km = _________m1600m = _________km102mm = _________m
500gm
500gm
?
Observe different weight & answer:
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FACTORS AFFECTING MEASUREMENT:READING TAKEN BY THE INDIVIDUALS.THE WAY OF MEASUREMENT.ALERTNESS OF INDIVIDUAL & CARE
TAKEN BY HIM IN MEASUREMENT.ERROR DUE TO VARIATION IN THE
MEASURING INSRTUMENT.
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LEAST COUNT SCALE
?______SELECTION OF INSTRUMENT DEPENDS ON THE
ACCURCY REQUIRED.
WRIST WATCHTAPE, SCALE.WEIGH BRIDGE.SIMPLE BALANCE.
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NAME PROPER INSTRUMENTS TO MEASURE FOLOWING JOBS:
JOB INSRTUMENTS
DIAMETER OF ROD
CURRENT
TEMPERATURE
MEASURE WEIGHT
WRITE DOWN LEAST COUNT OF FOLLOWING INSTRUMENTS:VERNIER CALIPER = ____________METER TAPE = ____________WRIST WATCH = ____________