MEASUREMENT

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MEASUREMENT
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TYPES

• QUALITATIVE
• RESULTS ARE DESCRIPTIVE (NONNUMERIC BIG, SMALL,
  PINCH, ETC.)

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• QUANTITATIVE
• RESULTS ARE NUMERIC WITH UNITS (1 INCH, 5 POUNDS,
  ETC)

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SI(FUNDAMENTAL)UNITS

• 1) LENGTH METER (m)
• 2) MASS KILOGRAM (kg)
• 3) TIME SECOND (s)
• 4) TEMPERATURE KELVIN (K)

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• 5) AMOUNT OF SUBSTANCE MOLE (mol)
• 6) PRESSURE PASCAL (pa)
• 7) ENERGY JOULE (J)

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DERIVED UNITS

• DEFINED IN TERMS OF 2 OR MORE SI UNITS
• REQUIRES MATH (CALCULATED VALUE)
• EXAMPLES

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• 1) VOLUME
• VOLUME L x W x H LENGTH UNIT3
• UNITS cm3 (mL), dm3 (L), etc.

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• 2) SPEED
• SPEED DISTANCE/TIME
• UNITS m/s, km/s, km/hr, etc.

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• 3) DENSITY
• DENSITY MASS/VOLUME
• UNITS kg/cm3, g/cm3, g/mL

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• PHYSICAL PROPERTY USED FOR IDENTIFICATION
• DOES NOT DEPEND ON HOW MUCH MATERIAL YOU USE
• EX DENSITY OF 1.00 kg OF SILVER DENSITY OF
  1.00 g OF SILVER

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PRACTICE PROBLEMS

• COPY SHOW ALL WORK. DONT FORGET UNITS.
• 1) WHAT IS THE DENSITY OF AN OBJECT WITH A MASS
  OF 73.7 g AND A VOLUME OF 5.34 cm3?
• 2) WHAT IS THE VOLUME OF A CUBE THAT IS 7.3 m ON
  A SIDE?

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• 3) WHAT SPEED IS AN OBJECT TRAVELING AT TO GO
  4.0m IN 0.045s?