The fundamental types of measured quantities, along with their standard units, form the basis of the International System of Units (SI). These quantities allow us to describe and quantify the physical world. Here are some of the main types of measured quantities:
Fundamental Measured Quantities
These are the basic quantities from which all other measurements are derived. The provided reference lists these:
Length
- Measured in: Meter (m)
- Definition: Length is a measure of distance or extent.
- Example: The height of a building, or the width of a table.
Mass
- Measured in: Kilogram (kg)
- Definition: Mass represents the amount of matter in an object.
- Example: The weight of a book, or the mass of a car.
Capacity
- Measured in: Liter (L)
- Definition: Capacity measures the volume an object holds.
- Example: The amount of water in a bottle, or the fuel in a gas tank.
Electric Current
- Measured in: Ampere (A)
- Definition: Electric current is the flow of electric charge.
- Example: The current flowing through a lightbulb or a phone charger.
Amount of Substance
- Measured in: Mole (mol)
- Definition: Amount of substance is a measure of the number of elementary entities (like atoms or molecules) in a sample.
- Example: The amount of carbon atoms in a diamond, or the number of molecules in a gas sample.
Luminous Intensity
- Measured in: Candela (cd)
- Definition: Luminous intensity describes the brightness of a light source in a given direction.
- Example: The brightness of a light bulb or a computer screen.
Temperature
- Measured in: Kelvin (K)
- Definition: Temperature measures the degree of hotness or coldness of an object or environment.
- Example: The temperature of water, or the ambient air temperature.
These measured quantities form the core of our quantitative understanding of the physical world. By using their corresponding units of measurement, we can objectively describe and analyze different phenomena.
