# Brainee

Senior Members

71

## Everything posted by Brainee

Why are only alpha, beta and gamma radiation often mentioned? There are other forms of radiation.
2. ## f(x)dx

Then what is it?
3. ## f(x)dx

How do you calculate f(x) times dx?
4. ## f(x)dx

in integrals?
5. ## f(x)dx

what doe f(x)dx mean and how is it used?
6. ## matter-antimatter

Is quark a particle?
7. ## matter-antimatter

What about matter quarks and anti-matter quarks, do they annihilate?
8. ## matter-antimatter

Can anti-matter protons annihilate with matter protons or is it only matter and anti-matter quarks that can annihilate?
9. ## Calculus

What is calculus used for.
10. ## Calculus

I do not understand what calculus means in internet. Could someone please explain it simply for someone without mathematical education. Thanks.
11. ## Calculus

What is calculus?
12. ## initiator in boosted fission

How do boosted fission bombs have fusion fuel in centre since that is where the initiator is?
13. ## James Webb Space Telescope

When will all new knowledge from James Webb Space Telescope be available in book/-s? Are at present any new knowledge from James Webb Space Telescope available? If so please mention it or them.
14. ## spectography and red shift

what is a standard candle?
15. ## spectography and red shift

How do you know how much light has redshifted?
16. ## spectography and red shift

Sorry, I meant when light from distant body red shifts, how can use spectrography to determine what its made of?
17. ## spectography and red shift

When space body travels far it red shifts, how can one then see what it is made of using spectgraphy?
18. ## anti matter

I meant when anti-electron and a common quark meet do they annihilate or does it have have to be same particle type to annihilate for example an anti-electron and a common electron?
19. ## anti matter

When an anti-electron and an anti-quark meet do they annihilate or does it have to be same particle type to annihilate for example an anti-electron and an electron?
20. ## metal detector

How do metal detectors work since they can detect metals that are not magnetic?
21. ## universal history

It was said that the observable universe was larger than the entire universe. It was said at https:www.youtube.com/watch?v=tYh8GZDH8E4 3:17 to 3:26 It cannot be right because the observable universe is part of the entire universe?
22. ## Galaxies or black holes

He shows pictures of the galaxies or black holes early on in clip then says they are black holes later on.

24. ## Galaxies or black holes

Michio Kaku says that certain bodies that look like galaxies are black holes. How can this be?
25. ## Photons effect

How are photons responsible for magnetism, electricity and light?
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