According to Darula and Kittler:
In the 3rd century BC Alexandria became the centre of civilisation, and it was able to collect the knowledge of Sumer, Babylon, Egypt and Greece, mingled with Persian inventions. This first 'global' Mediterranean culture produced the standard calendar adopted by Julius Caesar in 46 BC, following the system used in Egypt since 238 BC, introduced by Ptolemy III Euergetes on the suggestion of his son's teacher Erasthenes. This so-called Julian calendar is still in use, although the Christian dating has been in existence only since 532 AD. (142).
The basis for angles likewise being measured in degree, minutes and seconds was a new Sumerian-invented lightweight wheel that was supported by three sticks and roped together at its axis to divide a circle into 60 degree; this innovation resulted in sexagesimal measurements of angles within a full 360 degree circle (Darula & Kittler 142).
For example, the number 360 can be divided by all numbers from 1 to 10, except 7, as well as by their ten-times multiples; in 170 BC, the Greek geographer Hypsicles first proposed using latitude and longitude, expressed in degrees, to reflect the location of a place on the spherical Earth's surface (Darula & Kittler 142). By 300 B.C., the Greeks had began using astronomical calculations to develop the first three reference lines circling the earth: the equator and the tropics of Cancer and Capricorn; Eratosthenes then added a number of east -- west latitude lines, and...
Algebra, Trig Find the radian measure of the central angle of a circle of radius r = 4 inches that intercepts an arc length s = 20 inches. The formula for an arc length is a = r?, where'd is the arc length, ? is the central angle in radians, and r is the radius. That said, s = 20, r = 4, and ? is unknown. = 5 radians The central angle is
public administration and considers the effect of their writings and theories on the field of public administration. It has 6 sources. An analysis of the core areas of public administration and how these areas interrelate with one another; taking into account the theories and writings of major players in the field of public administration and how their views shaped these areas. The principles of public administration are the clearest description of
Interestingly, however, only females reported over 60 hours per week. The scatterplot below shows the hours worked with females on the top axis: Mean 29.0567 Standard Error 1.132015 Median 40 Mode 40 Standard Deviation 19.31074 Sample Variance Kurtosis -1.0554 Skewness -0.26386 Range 80 Minimum 0 Maximum 80 Sum Count The correlation between the satisfaction with the weight in men and women is 0.097. As expected, this is also a weak correlation, but it does indicate that males are more likely to be satisfied with their weight. 46.6% of males and 37.3% of females
If you had done this significantly too early or too late, what kind of error would there have been your shadow length? The shadow length would have a bigger value as sun's angle would have been smaller. If you had done this significantly too early or too late, what kind of error would there have been your circumference value? Such measurement would have given smaller sun angle value for the location, which would
6. The rabbits will never die. The question was how many male/female rabbit pairs will be there after a year or 12 months? When the experiment begun, there is a single pair of rabbits. After duration of one month, the two rabbits have mated though they have not given birth. As a result; there is still only a single pair of rabbits. After duration of two months, the initial pair of rabbits will give
elective or emergency childbirth, a choice between general and local anesthesia is often called for. Cognizing the surroundings helps the birthing process. Therefore, a local anesthetic administered via an intrathecal spinal injection or through a catheter in the epidural space will prove an advantage. Ratcliffe and Evans at John Radcliffe Hospital in Oxford, England attempted tested this advantage on more than 90 elective Cesarean parturients. (Ratcliffe & Evans, 1993)
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