A geographical interest group calculates the local latitude and longitude by observing the laws of the sun and shadows from summer solstice. The specific experimental process and conclusions are as fo

A geographical interest group calculates the local latitude and longitude by observing the laws of the sun and shadows from summer solstice. The specific experimental process and conclusions are as follows: local sunrise on the same day.

Question 1:B?

Question 2:B

Test analysis:

Question 1: The sunrise time is 5: 30 Beijing time, the sunset time is 19: 30 Beijing time, and the calculated day length is 14 hours. Local noon 12, Beijing time 12: 30, so it is calculated that it is located in the west of Beijing with a longitude of 65430. , b Right. A, c and d are all wrong.

Question 2: According to the relationship between the sun shadow length L of the target object and the target object measured at 8: 00 Beijing time, it can be found that the cotangent of the sun altitude angle at this time is that the shadow length divided by the target object length is equal to √3. From the trigonometric function, the altitude angle of the sun at this time is 30, and the sun rises 30 degrees every hour from 5: 30 to 8: 00. This day is the summer solstice, and the sun shines directly on the Tropic of Cancer. It should be Beijing time, located in China, and can only be north latitude. According to the formula of noon sun height angle, the local latitude is calculated to be about 17.5 N or 29.5 N, so there are only B pairs. A, c and d are all wrong.