The gravity of the moon and the sun on the earth forms an energy source. What is it called

The gravity of the moon and the sun on the earth forms an energy source. What is it called

Tidal energy

If the sun disappears (including its gravity), what will our earth do?

1. If the sun disappears suddenly, the earth will start from the position of the sun when it disappears and fly out in a straight line at a constant speed in the direction of 90 degrees from the line connecting with the earth, until it is captured by another planet with enough gravity, or wants to collide with a celestial body. During this period, the earth's temperature will continue to drop. 2. If the sun's gravity gradually decreases

Simple operation
(-3)×(-8/9)-5×(-8/9)+(-8)×8/9

Original formula = - 8 / 9 * [(- 3) - 5 + 8]
=-8/9*0
=0
Hope to adopt

7 / 9 * {9 / 7 * [the third power of 2 * (- 1) - 7] - 18} - the square of 3 * 2 / 3
Three times two-thirds of the square

3 * 2 square / 3
I don't understand here
It's supposed to multiply 7 / 9 into braces. It's supposed to be good

Simple calculation
2.14+0.39÷1.3 100-123.1×0.3 2.1×5.5
The calculation is as simple as it is

2.14+0.39÷1.3
=2.14+0.3
=2.44
100-123.1×0.3
=100-12.31*3
=100-36.93
=63.07
2.1×5.5
=2.1*5*1.1
=10.5*1.1
=11.55

A real number operation problem
[2 times root number 3-3 times root number 2] times [5 times root number 2 + 4 times root number 3]

[2 times root number 3-3 times root number 2] times [5 times root number 2 + 4 times root number 3]
=10√6-30+24-12√6
=-6-2√6

Real number calculation (6 questions in total)
7 √ 5 - {1 / 5} 2 {5 + 3} 3 - {5 +} 3} 75 + 2} 5 and 1 / 3-3 {108-8} 1 / 3} 15 ÷ 1 / {3 + 1 /} 5
√ 1 and 3 / 5 * 2 √ 3 * (- 1 / 2 √ 10) (√ 100 / 3 - √ 4 / 5) * √ 15

5 / 5 = 5-5-1 / 5 (5 / 5) 5 (((34 / 5) and (34 / 5) tick 52 ((5 / 5) tick 52 (5 + 3) and 3 (3 / 3) 3-3-3-3-5 [5 / 5 = 5-5-1 / 5 / 5 / 5 / 5 / 5 / 5 / 5 / 5 / 5 / 5 / 5 / 5 = 7 tick5-5 / 5 / 5 / 5 / 5 / 5 / 5 (34 / 5) and (34 / 5 / 5) tick 52 (5 / 5 / 5 / 5 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3 (3 / 8 / 8 / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3) 3 tick3 (3) 3 (3 / 8 / 8 / 8 / 3 / 3 / 3 / 3 / 3 / 3 / 3) 3 * √ 3 + √ 5 / 5

Real number problems in junior high school
Real number operation: on the plane, the straight line y = 5x + 1 and the parabola y = x ^ 2 + 2x-3 intersect at two points a and B to find the length of the chord ab
Evaluation of the algebraic formula: add m (> 0) g salt to the salt water with concentration of a / B, then the salt water concentration is?

y=5x+1
y=x^2+2x-3
Two intersections (4,21), (- 1, - 4) are obtained by solving the equations, so the length of AB is 650
I don't understand what the second question says

Under the same arithmetic square root, 2 is separated from them
If y equals root sign 3-x + root sign x-3 + 2, then the power of X is y = (the result retains 4 significant digits)

Because the root sign 3-x is greater than or equal to 0, the root sign x-3 is greater than or equal to 0,
So x = 3
So y = 0 + 0 + 2 = 2
So the power of X and y = 3 multiplied by 2 is about 2.884

Given abc0, when x = | a | / A + | B | / B + | C | / C, find the value of the 19th power of the algebraic formula x-92x + 2 (important process)

Abc0 knows that at least one of ABC is greater than 0;
Then only one of ABC is less than zero and the other two are greater than zero
X=|A|/A+|B|/B+|C|/C：X=1
I don't understand your consciousness! If you know that x is equal to 1, you can calculate it!