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Special Symbols. Symbols representing physical quantities, units, mathematical operations and relationships, astronomical bodies, constellations, and the Greek alphabet.
- About This Book
The Physics Hypertextbook is a reaction to three big...
- British-American System of Units
Let's move on to… mass (or is it weight?) Actually, it's...
- Intensity
As a general rule the larger the amplitude, the greater the...
- Aerodynamic Drag
The upward drag force now exceeds the downward pull of...
- Pressure-Volume Diagrams
A system can be described by three thermodynamic variables —...
- Shock Waves
When an object travels slower than sound, the ratio in this...
- Electric Potential
In fancy calculus language, field is the gradient of...
- Gauss's Law
Note that when r = R the field equations inside and outside...
- About This Book
In Conway and Guy's system, which is the one used here, the unit comes first, then the ten, then the hundred, e.g. the 123rd 'illion' is called one treviginticentillion (tre [3]-viginti [2]-cen [1]-tillion). In the other system, the hundred comes first, then the one, then the ten.
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This is a list of common physical constants and variables, and their notations. Note that bold text indicates that the quantity is a vector.
16 lip 2020 · The order of magnitude of a physical quantity is its magnitude in powers of ten when the physical quantity is expressed in powers of ten with one digit to the left of the decimal. Orders of magnitude are generally used to make very approximate comparisons and reflect very large differences.
Calculating the order of magnitude by truncation. The order of magnitude of a number is, intuitively speaking, the number of powers of 10 contained in the number.
Chemistry – Physics: The Avogadro constant (6.022 140 76 × 10 23) is the number of constituents (e.g. atoms or molecules) in one mole of a substance, defined for convenience as expressing the order of magnitude separating the molecular from the macroscopic scale.
