# mathematic

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1. ## The Rewriting of Particle Physics....possibly:

Disagreement with other measurements. Error here?
2. ## The speed of gravity = the speed of light. Does that mean gravity and light are the same thing?

Incorrect assertion: "The only thing that can travel at the speed of light is light, and if gravity can travel at the speed of light, then it's almost definitely the same thing as light. Also, there's no gravity or light in outer space. Almost certainly a sign that gravity and light are the same particle. " "it's almost definitely the same thing as light." Where did you get this? "there's no gravity or light in outer space" False
3. ## Alone again?

It is too soon to say. There are about 100 billion stars in the milky way. Only an infinitesimal number has been explored to determine whether life supporting planets exist.
4. ## Statistics Hypothesis Testing. Why is this the wrong critical z score? I got these values from the table.

Your question is not clear. Which score is wrong? Which answer is wrong?
5. ## Could someone please explain that although we are told the universe is expanding.

The Big Bang was less than 14 billion years ago. The speed up of the expansion was discovered during the 1990's by using supernova 1A /science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy https://www.e-education.psu.edu/astro801/content/l10_p9.html
6. ## Please give me a simple proof, X^0=1.

For $x\ne 0,\ x^0\times x^1=x^1=x$
7. ## Is possible to make any of the 4 fundamental forces weaker or go to 0 in any situation?

Gravity and e-m forces can be made 0 in isolation. Place object halfway in between attractions of equal strength. Also neutral things don't experience e-m.
8. ## Special Rel. Doubt

In the latest issue of American Scientist there is an article by Tony Rothman questioning E=mc^2. Are the assertions made in the article valid? Are there comments by other physicists available?
9. ## Bottle rinsing

Several rinses with small amount of water each time is better than one rinse with a lot of water.
10. ## why this egality is exact please ?

It would help if you defined symbols.
11. ## What is "base-2 number system"?

Examples 210=102, 310=112
12. ## Which and how different factors affect the sound made by the collision of tiny solid particles?

I was referring to an impact between a pair of specific objects.
13. ## Which and how different factors affect the sound made by the collision of tiny solid particles?

Size, shape, speed, impact point. In practice, probability distributions are used.
14. ## Tensor

Try math Forum.
15. ## The Vagueness of Inertial Reference Frames and the Classical Intuition Towards the EEP?

My thought - MEGO!
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