Doing Laboratory Experiments on Quarks
Reference Sensation Constant (Units)
knut.jpeg Touching ice $T^{\sf{b}} = 0$ (℃)
steam.jpg Touching steam $T^{\sf{c}} = 100$ (℃)
achromatic.jpg Not seeing the Sun $U^{\sf{d}} = 0$ (MeV)
Different people in different societies may have profoundly different ways of seeing things. So we make measurementsXlink.png to cope with perceptual variation. Mensuration is also a way to transcend any personal sensory limitations or variations from the second hypothesis. Overall, a systematic quantitative approach to observation is crucial for objectifying the description of sensation. Measurement techniques can be quite arbitrary to start, e.g. measurements of length began by referring to somebody's footXlink.png. But nonetheless observational methods have become very precise and dependable because experimental physicists have invested an enormous effort in developing calibration standardsXlink.png and calibrated techniques. For example, atomic clocksXlink.png can be used to make time measurements that are good to about one part in 1014. By comparison, in 2013 the US economy was 17 trillion dollars or about 1015 cents. So physicists can be fussy in a way that is like counting every dime spent in the USA per year. When we speak of doing laboratory experiments, we mean that observations are being made and reported in this fastidious style.

For WikiMechanics, laboratory practice starts with the reference sensations that are benchmarks from which all perceptions are judged and recognized. These sensations are mathematically represented by constants that are sometimes used to express calibration standards. See the accompanying table for three examples where $T$ notes the temperature and $U$ is the internal energy. Quark types are written as b, c and d for bottom, charmed and down-quarks. The numerical values for these constants are established by convention without any claim of universal validity. They can be altered by collective agreement if expedient. So statements about the units of measurementXlink.png are required for a complete report.
Right.png Next step: quarks are indestructible.
Summary
Nouns Definition
Ice Constant $T^{\sf{b}} = 0 \ \ \text{(℃)}$ 1-6
Nouns Definition
Steam Constant $T^{\sf{c}} = 100 \ \ \text{(℃)}$ 1-7
Nouns Definition
Sun Constant $U^{\sf{d}} = 0 \ \ \ \ \left( \sf{\text{MeV}} \right)$ 1-3
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