It was solved because they had help others by trading
Answer:
Three Gorges Dam becomes popular tourist site. The Three Gorges Dam, the largest of its kind in the world, in central China has become a popular tourist site which attracted an estimated 100,000 tourists in the week-long May Day holiday, a travel agency executive said on Friday. The Three Gorges Dam includes three areas: the dam itself, a hydroelectric, and a system of locks. The height of the Three Gorges Dam is 185 meters (607 ft) above the sea level. The dam is about 2,300 meters (7,546 ft) long and about 115 meters (377 ft) wide.
Explanation:
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Answer: two solar eclipses separated by one Saros cycle will have the same geometric characteristics (they will both be total, or partial or annular).
A Saros is a period of time of about 18 years 11 days and 8 hours and represents the time needed for the system composed by Moon, Earth, and Sun to return to its initial position.
Indeed, this is due to a natural harmony of the Moon’s motion: it takes 29.53 days to complete one orbit around Earth (Synodic Month), it takes 27.21 days to pass from the same node of its orbit (Draconic Month) and it takes 27.55 days to go from perigee to perigee (Anomalistic Month); the composition of these three motions gives one Saros of around 6585.3 days, composed by 223 Synodic Months, 239 Anomalistic Months and 242 Draconic Months (with a precision of few hours).
It has been observed that after one Saros cycle Moon, Earth and Sun are in the same initial position, therefore an eclipse occurring on day 1 of two consecutive Soros cycles would have the same geometric characteristics, which means that one Saros can be considered the periodicity of solar and lunar eclipses.
Due to the fact that a Saros is not composed by a whole number of days (we have a remainder of 8 hours), the two eclipses won’t be visible from the same location on Earth due to the rotation around its axis. It takes about 3 Soros for this to happen.
