Lecture Notes

Intro to SI Units

• SI (International System of Units): A globally accepted system for measurements in the scientific community.
• Fundamental Quantities: Seven core quantities on which the SI system is based.

The Seven SI Base Units

1. Length - Meter (m)
2. Mass - Kilogram (kg)
3. Time - Second (s)
4. Electric Current - Ampere (A)
5. Temperature - Kelvin (K)
6. Amount of Substance - Mole (mol)
7. Luminous Intensity - Candela (cd)

Importance of SI Units

• Facilitates clarity and consistency in scientific communications.
• Ensures standardization across various scientific disciplines.

Unit Conversions

• Understanding unit conversions is vital for scientific calculations.
• Example: 1 mole of oxygen = 16 grams.

Derived Units

• Examples include area (square meters), volume (cubic meters), and pressure (Pascals).

Applications of SI Units

• Used in designs, experiments, and daily measurements.
• Important for ensuring reproducibility of experiments.

Conclusion

• SI units streamline scientific discourse and research efforts worldwide.