Question 1: The altitude angle of the sun at noon = 90-latitude difference (geographical latitude of the location, latitude difference of the jade straight point)
So latitude difference = 90- solar altitude angle
First of all, look at the watch. First, look at the noon sun altitude angle at A and B for the summer solstice.
The latitude difference between summer solstice and summer solstice = 90-80 (noon sun height angle of summer solstice) = 10, so the latitude difference between the direct point of the sun (Tropic of Cancer) and summer solstice is 10, that is, the latitude of summer solstice is 23 26'10.
PS: If the calculation is negative, it is either wrong or it may be in the southern hemisphere.
Let's take another look. From may 2 1 day to June 22, the variation of the sun's altitude angle at noon from summer to Sunday increased to the maximum. This means that land A is north of the Tropic of Cancer. Because the closer to the direct point, the greater the noon sun altitude angle. From May 2 1 to June 22, the direct point of the sun moves northward and slowly approaches the Tropic of Cancer, and the noonday sun altitude angle of a place is also increasing, so a place should be north of the Tropic of Cancer. If a is in the south of the direct point, the noon sun height angle should gradually decrease.
So the latitude of a place should be 33 26' n.
Similarly, the latitude of b is 2 n.
Unlike A and B, Ding Bing and B give that the sun shines directly on the Tropic of Capricorn in winter, so it should be considered in the southern hemisphere.
The latitude of c is very simple. Tropic of Capricorn is the solar altitude angle of 90 from winter to sunrise, so the latitude of C is 23 26. ..
Similarly, the geolocation latitude is south latitude 16.
The rotation linear velocity is related to latitude, and the rotation linear velocity at the equator is the largest, so the rotation linear velocity at the second place is the largest, so B is selected.
(This is the most common solution and takes a long time. If you are more skilled, you don't have to work it out. From May 2 1 to July 23, the noonday solar altitude angle of a place first increases and then decreases, so this place must be north of the Tropic of Cancer. At first glance, it can be known that on the Tropic of Cancer, the noonday solar altitude angles in places B and D decrease first and then increase, so the noonday solar altitude angles in places B are in the tropics, and the noonday solar altitude angles in places B are 66 degrees higher than those in places D from winter to morning.
Question 2: The tropic of Capricorn where the height of the first sun reaches the minimum in a year = direct sunlight.
A: Aswan Hydropower Station in Egypt has a tropical desert climate, and the peak of power generation is when the sun shines directly on the Tropic of Cancer.
B: It's summer in the southern hemisphere when the sun shines directly on the Tropic of Capricorn, and the Brazilian grassland is lush with vegetation.
That's right.
D: Cape Town has a Mediterranean climate. It's summer when the sun shines directly on the tropic of Capricorn. It's hot and dry.
Question 3: Jiangsu Province is located in the middle and low latitudes north of the Tropic of Cancer. The south side of the building is full of sunshine and light and heat, and the difference between light and heat between the east and the west is small. The flowering date is earlier than that of the north side, and the difference between the flowering time of trees in the south side is small. The north side of the building is facing the sun, and the light and heat are insufficient, so the east blooms earlier than the west.
Question 4: According to the direction and length of the sun's apparent trajectory in the picture, it can be determined as the summer half year, and the time can be inferred from the vernal equinox to the autumnal equinox.
Hope to adopt. What?