 # The Seven Ways we Describe the Universe (SI Units) – #5 Posted by EEs Talk Tech - An Electrical Engineering Podcast
The Seven Ways we Describe the Universe (SI Units) - #5 /

The entire universe can be described using just seven different units! These are the metre, kilogram, second, ampere, kelvin, mole, and candela and are defined by the The International System of Units (SI) as the seven base units through which all other units can be derived.

Learn more about these standard units, their interesting history, and relevance today. Daniel Bogdanoff, Mike Hoffman, and Matthew Woerner discuss.

# Discussion Overview:

What is Metrology?
Meteorology vs Metrology
What are SI Units and what is the international system of units?
Why do we even have SI units?
The history of the yard, where does the word “ruler” come from?
The specific value of the kilogram (kg)
Basics of the kilogram and how we define mass 07:00

The kilogram has sister units.
Units of measure defined by constants in the universe are helpful because they don’t change.
What makes up a second? (Uses a cesium atom‘s vibrations)

What are base SI units? 12:06
What are derived SI units? Derived SI units are units of measurement that can be found by selectively combining the seven base SI units. For example, the volt.

What is the difference between base and derived SI units?

Electrical current, the Ampere, and Electromagnetics 15:00

What is the triple point of a substance?
It is the temperature and pressure at which a substance’s gas, liquid, and solid states coexist

What are moles (chemistry) – the quantity of a substance 20:20

What is a candela? (Luminous intensity)

Planck’s constant is important! How to use Planck’s equation

The Watt balance is replacing the physical versions of the kilogram 26:16

Mike’s amazing water bottle flip 38:53

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