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How many days of the year does the equator have a 90 degree sun angle?
Two: the spring and autumn equinoxes.
How many hours and minute and seconds are in a year?
Using the tropical year (the time between two vernal equinoxes) as opposed to the sidereal yea (the time the earth takes to get back to where it started in its orbit), the year is 365 days 5 hours 48 minutes 46 seconds long. 1 day = 24 hours → the year is 8765 hours 48 minutes 46 seconds ≈ 8765.813 hours 1 hour = 60 minutes → the year is 525,948 minutes 46 seconds ≈ 525,948.767 minutes 1 minutes = 60 seconds → the year is 31,556,926 seconds long
At what rate does the angle of sunlight rays change?
About 15 degrees per hour but depends on location and time of year. Most true on equator at equinoxes
How many years are there in from 1 A.D. until 1 B.C.?
1 year; there is no year 0
How many days and weeks are there in a year?
There are approximately 365.2425 days in a year in the Gregorian calender, and 7 days in a week. So, there are approximately 52.177 weeks per year. Rounding down gives us 52 weeks and 365 days in each year, except for leap years. Note that 52 weeks equals 364 days (52 x 7 = 364), which is not quite 1 year. The length of a year presently is closer to 365.2422 days so in the year 4000 they might adjust so that the astronomic equinoxes and solcistes realign.
