Science help.....again.....What is the special name given to the day in our year that has twelve hours of night adn day exacly?(There are two in a year but i am looking for the event that occurs in spring)
2006-09-26 23:54:57 · 8 answers · asked by Anonymous in Education & Reference ➔ Homework Help
Equinox. Vernal equinox and Autumnal equinox
2006-09-26 23:56:22 · answer #1 · answered by Mr Mojo Risin 4 · 0⤊ 0⤋
The basic explanation is that the idea of having 12 hours of daylight and night on the Equinox is not exact. Everyone is said to have "roughly" or "about" 12 hours of daylight on the Equinox. This is because day length calculation can vary depending on who is doing the measurement of sunrise or sunset. For instance, before sunrise, there is twilight, and the exact time of sunrise can be observed slightly differently by different people or sources (and so can sunset time too). Pinpointing a specific time for sunrise (or sunset) can also be especially difficult when a location's day length changes by only a few minutes per week. (Remember, your focus is on changing photoperiod each week, so don't be distracted by minor changes in sunrise/sunset times.)
2006-09-27 06:57:07 · answer #2 · answered by Spongebob 4 · 0⤊ 0⤋
Vernal equinox.
2006-09-27 07:36:27 · answer #3 · answered by Anonymous · 0⤊ 0⤋
http://en.wikipedia.org/wiki/Equinox
2006-09-27 07:00:06 · answer #4 · answered by tatal_nostru2006 5 · 0⤊ 0⤋
Pie.
2006-09-27 07:03:15 · answer #5 · answered by Dickhead 1 · 0⤊ 0⤋
equinox
2006-09-27 08:26:07 · answer #6 · answered by ????? 7 · 0⤊ 0⤋
32&**(#@! #$%$^ %^%
bye
2006-09-27 06:56:48 · answer #7 · answered by ghada.abassy 1 · 0⤊ 0⤋
@#$(*&%+_~!>
2006-09-27 06:58:00 · answer #8 · answered by Anonymous · 0⤊ 0⤋