Pyrexia mean rise in body temperature. Using your context clue from the word pyro you can guess that Pyr mean fire or heat related.
You don't. Astral projection is pseudo science, but if you believe those who claim that it is a real thing, then it involves things like meditation and what not and then you can leave your body and float around and see the world and meet other souls and things like that. It's not supported by any scientific evidence.
<span>Low fluid intake in older adults may be caused by :
- less intense feelings of thirst.
- chronic disease.
- certain medications.
- reduced ability of the kidneys to concentrate urine.
</span>
The large the amplitude the large the rate of energy transfer