1. Does star collapse into Dark hole?
1.1 Collapse happens when (Earth Science) Crust's inward push is stronger than mantle and core's outward push. or mantle's inward push is stronger than core's outward push.
1.2 But due to Newton's 3rd law, action and reaction force, mantle and crust will definitely have enough outward force to respond to inward push. So unless you empty mantle or crush. the force pushes will reach equilibrium, when inward and outward push equal to each other. so Collapse does not happen from my opinion.
1.星星是否會崩塌成為黑洞？
1.1當（地球科學）地殼的向內推力強於地幔和核心向外推進時，會發生坍塌。 或者地幔的向內推力比核心的向外推力強。
1.2但是由於牛頓第3定律，作用力和反作用力，地幔和地殼肯定會有足夠的向外力來響應內向推力。 所以，除非你清空地幔或核心。 當向內和向外推動彼此相等時，推力將達到平衡。 所以，在我看來，崩潰不會發生，。
2. When you draw a cross 十字 = A,B,C,D angles A+B=A+D=180 B=D
3. Are all even numbers, sums of prime numbers or sums of products of prime numbers??
Answer: 1. All even numbers products of 2, so all even numbers can be halved (double).
2. All even numbers can be broken into 1+ X while X is a product.
3. You can add or sum 2 prime numbers, to make various combinations from a list of all prime numbers. You will find probably infinitely many values. This proves that nearly all even numbers can be a sum of 2 prime numbers. or 2 products of prime numbers.
3.所有偶數，質數的總和或質數的乘積之和？
答案：1。所有偶數均為2的乘積，因此所有偶數均可減半（雙數）。
2.所有偶數都可以分為1+ X而X是乘積。
3.您可以添加或加總2個質數，以便從所有質數列表中進行各種加的˙組合。 您可能會發現無限多的值。 這證明幾乎所有偶數都可以是2個質數的總和。 或2個質數乘積。
4. Light speed is not related to Time.
Refraction means change of light speed. but it does not affect time.
光速和時間無關。折射意味著光速的變化。 但它不會影響時間。
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