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Questions and Answers
What was the primary reason for the introduction of SI units in measurements?
To avoid confusion and improve accuracy.
List all 7 base SI units and their corresponding symbols.
Meter (m), kilogram (kg), second (s), ampere (a), kelvin (K), mole (mol), candela (cd).
Explain how the use of body parts in early measurements was inadequate.
Body parts varied greatly in size and shape among individuals, leading to inaccurate measurements.
How does the introduction of the kilogram as a base SI unit enhance mass measurement?
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Why is 'luminous intensity' measured in candelas rather than another unit?
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Study Notes
Measurements and Units
- Early measurement systems relied on body parts, leading to inaccuracies.
- Standardization of units was established through the International System of Units (SI) to minimize confusion.
- Key SI Units:
- Length is measured in meters (m).
- Mass is quantified in kilograms (kg).
- Time can be measured in seconds (s) or minutes (m).
- Electric current is represented in amperes (a).
- Temperature is measured in kelvins (K).
- Amount of substance is expressed in moles (mol).
- Luminous intensity is quantified in candelas (cd).
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Description
Test your knowledge on measurements and units with this quiz. Explore the evolution from early measurement systems to the modern International System of Units (SI). Understand the key SI units such as meters, kilograms, and more.
