4 ms·
maybe measuring is more accurate to say than counting. that way you include things like units of speed, and negative numbers (you can't really count -3)
by asddubs 3y ago
maybe measuring is more accurate to say than counting. that way you include things like units of speed, and negative numbers (you can't really count -3)
- LudwigNagasena 3y agoThat means "huge" and "small" are numbers.
- MrRolleyes 3y ago[dead]
- ndsipa_pomu 3y agoYes, measuring is a more advanced concept than counting as it introduces fractions. I don't think simple measuring would include negative numbers though as that would include a measuring direction concept (i.e. vectors) as rulers don't have negative numbers on them and you can't have a speed of -5kph.
- asddubs 3y agoyou can measure -5°c though
- ndsipa_pomu 3y agoYeah, but that's just an artefact of that particular scale. You'd have trouble measuring -5K
- asddubs 3y agoyou can measure negative pressure, negative acceleration
- ndsipa_pomu 3y agoNegative pressure is usually a comparison with e.g. atmospheric pressure, so I wouldn't consider it a simple measurement. An actual negative pressure would presumably be less empty than a vacuum e.g. the Casimir effect. Negative acceleration has a directional component, so again, it's like a negative velocity and is a vector.
- ksaj 3y agoI've read articles about negative Kelvin where they surmise it would get hotter. Keeping in mind what heat actually is, the atoms would just be out of phase.
- ndsipa_pomu 3y agoYes, temperatures below absolute zero are possible and have been achieved (something to do with flipping the high and low energy states), but I stand by my comment that it isn't easy to measure and definitely a far more advanced concept for kids than negative numbers. https://en.wikipedia.org/wiki/Negative_temperature https://en.wikipedia.org/wiki/Negative_temperature