varialectio
varialectio t1_jaby9ku wrote
Reply to ELI5 How do you calculate pressure? by Personhuman815
Calculate from what?
Do you mean take a reading from a gauge in one set of units and convert to kg/cm^2 ?
Or calculate from first principles like gas laws or kinetic theory?
varialectio t1_jaab0fx wrote
In simple terms, there's a chemical in the cells of the retina that turns light into nerve impulses. It gets used up doing so but is constantly being regenerated. With bright lights too much gets used and it takes a while for the regeneration process to replenish the stock before those particular cells can respond properly to light again. In the meantime the nerves from those parts of the retina transmit random signals to the visual part of the brain.
varialectio t1_j6krz6g wrote
Reply to ELI5: How does citizenship work? Can I (US Citizen) move to the EU and just become a citizen? by _99Percent
Generally speaking, no.
If you have a spouse of that area and/or job with the ability to support yourself, maybe, but you still have to jump through several hoops.
varialectio t1_j66fh13 wrote
Reply to Eli5 How are seedless grapes made? by Exact-Vast3018
Like other seedless things, you cross two varieties that you know will produce seedless progeny in the first generation (F1 hybrids). You obviously can't produce offspring from them so if you want to breed more plants you have to go back to the original parents each time.
You can always take cuttings and propagate your seedless variety as clones too.
varialectio t1_j652k40 wrote
Somebody in a high-up position will have negotiated their own contract. If its a position that carries a risk of getting fired if things don't work out they will have included compensation for that. If it's for a fixed term, just like your mobile phone contract it could include the value of the contracted payments until the term is up.
varialectio t1_j3q8948 wrote
Reply to During digestion, does ethanol react with lipids to form esters, at a significant conversion rate? by spamarind_soda
Typically, the formation of esters is an equilibrium process able to proceed in either direction.
Alcohol + Acid <=> Ester + Water
To drive the equilibrium to the right (to make an ester in the lab) it is usually necessary to continually remove the water from the mix as it is created. In the presence of excess water as is going to be the case in the body, the equilibrium is going to be well over on the side of the reactants
varialectio t1_iufy9k5 wrote
Anything finely divided has millions of facets that reflect light in millions of directions again and again. Nothing is 100% transparent. So the incoming light gets completely mashed up giving white.
Salt, powdered sugar, mist, a waterfall, ground glass, etc, etc, all the same reason.
varialectio t1_issb015 wrote
Reply to How can we know details about animals that lived thousands of years ago if all we have are bones? by DemetrioGonz
Bone size indicates the weight it had to support. Attachment points show what sort of musculature it had. Size and length of limbs and the angles they make with the torso indicate how it could move and how fast. Jaw and teeth give clues about diet. Then there are things like chest size and lung capacity, whether it has feathers, defensive armour which indicate a prey animal, and so on.
varialectio t1_jadehk0 wrote
Reply to How do measurement uncertainties propagate through calculations in an experiment? by slackslackliner
1 - Yes. The relative uncertainty must stay the same so X ± 1 per 10 seconds is the same as X * 6 ± 6 per minute.
2 - Averaging multiple results reduces the error by a factor of 1/✓n. Root 5 is a little over 2 so averaging five measurements would roughly halve the uncertainty.