5 femtometres
5 fmLength · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Length & distance
Just how long is 5 femtometres?
Microscopic
5 fm
5 femtometres
The quantity is exact as entered.
5 fmLength
0 - shared origin
Atomic nucleus
An atomic nucleus is the compact central part of an atom, made from protons and neutrons.
10 fmCharacteristic size
0 - shared origin
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions. A ruler represents the selected distance or a measurement not visible in this view.
A little perspective
The characteristic size of an atomic nucleus is about 2 times 5 femtometres.
Measurements, assumptions & sources +
5 femtometres
Length: 5 fm; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Atomic nucleus
Characteristic size: 10 fm; representative.
A 10 fm diameter scale model of a heavy nucleus. Nuclear size depends on the number of nucleons.
University of Utah — Cell size and scale
The marked characteristic size is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 5 femtometres with the characteristic size of an atomic nucleus. The notes below explain how each value was chosen.
Atomic nucleus
10 fmCharacteristic size · representative
A 10 fm diameter scale model of a heavy nucleus. Nuclear size depends on the number of nucleons.
- Comparing
- Length ↔ Characteristic size
- Relative size
- The characteristic size of an atomic nucleus is about 2 times 5 femtometres. The characteristic size of an atomic nucleus is approximately 100% greater than 5 femtometres.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- The characteristic size of an atomic nucleus: This is a representative comparison value; individual specimens or conditions can vary.
This comparison follows the selected length only; other dimensions may differ.
5 × 10⁻¹⁵ mmetres
1.6404 × 10⁻¹⁴ ftfeet
3.1069 × 10⁻¹⁸ mimiles
3.3423 × 10⁻²⁶ AUastronomical units
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