If the sun exploded, would the neutrinos kill you first?
Well, it seems that you are worrying about one of the fictional disasters. Let me make you feel better.First of all, if our sun blows up, it will NOT give out such many neutrinos. Because our sun cannot become a supernova. Our sun is too light to become a supernova, and it cannot form a compact neutron star in its core. The SN1987A is estimated to be 16-20 times heavier than our sun. And before its explosion, the core contracts abruptly because of the absorption of electrons by protons. This process[math] e^- + p \rightarrow n + \nu [/math]is the source of the neutrino sea.However, our sun can only become a red giant and may experience one Helium flash which is more likely to destroy us. The remnant is a Helium-made White Dwarf star, which cannot be a factory of neutrino.But, if you make a decision to replace the sun with the progenitor of SN1987A, and try to test human beings' adaptation to neutrinos. Well, Let's do some arithmetic.If our sun can emit 1E+58 neutrinos all in 1 second, considering the distance between sun and earth ~ 1E+13 [cm], the amount of neutrinos passing through 1 [cm^2] area on earth is about 1E+18. Huge amount, huh?Then how many neutrinos will interact with our body? Let's take neutrino's extremely tiny cross section into consideration. The neutrino experiments tell us it is around 1E-44 [cm^2]. And 1 cubic centimeter of human body may contains 1E+23 nucleons. And then, within that lethal 1 second, 1 [cm^3] of our body will interact with neutrinos for (1E+18 * 1E-44 * 1E+23 = 0.001) times. What? Less than 1 times? Come, you argue that the cross section should be larger for such highly energetic neutrinos! Fine, after you increase the cross section by 1000 times, there is finally 1 interaction with neutrino within 1 cubic centimeter of your body. So what?Suppose the energy of neutrino can be transferred to your flesh body, then it is about 0.00001 erg. That is to say, you may be receive a neutrino radiation, and get 0.00001 erg per gram energy to your body. That radiation dose equals to 1E-10 Sievert [Sv] = 1E-7 mSv.And the International Committee on Radiation Protection say it is not good to receive 1 mSv within one year. So what are we afraid of? The God said, let there be light.
Scared of sun exploding and planets colliding?
Actually no, the Sun exploding is not possible. It's in the same place saying how long the Sun's main sequence will last. So that means that you either read it wrong or you misunderstood it. And no, there will be no planets colliding in 2030 or sooner or later. Here's what the solar system will look like at the beginning of that year: http://www.heavens-above.com/SolarSystem... And here's how it will look like in 2031: http://www.heavens-above.com/SolarSystem... No collisions. Whoever told that 10-year-old girl about planets colliding to scare her is a horrible person. I have no sympathy to those people because it's hard enough to teach how the world works without having to deal with a**holes making up lies and making us waste our time with debunking. That's not what science is for. In the end, this is just the whole 2012 story all over again. People have short memories and too much idle time on their hands.
What would happen if the sun exploded?
This sort of thing has been covered pretty well by science fiction. The 2007 film Sunshine was about a spaceship crew who was delivering a giant nuclear bomb to the Sun because it was dying, causing the Earth to get too cold. But I won't give away more of the plot than that. There's also an old short story about the Earth getting pulled away from the Sun by a rogue star. You should definitely read it, it's a story that's always stuck in my mind ever since I came across it. And you can find it here! http://www.baenebooks.com/chapters/07434... In reality, the Sun isn't the type of star that explodes as a supernova, though if Dragonball Z characters are involved anything goes. If it somehow did explode, all life on Earth would be obliterated. But if we didn't get as much sunlight as we do now, for whatever reason, the Earth would certainly get a lot colder, and in an extreme case, eventually I'd imagine the only life left would be organisms living off of geothermal energy around deep sea vents.
Will throwing an iron frying pan into a star cause it to explode?
Okay... So I understand that a star explodes as soon as it starts to create iron because it cannot fuse iron into any heavier element and it runs out of fuel and gravity causes it to collapse, then explode. But hypothetically saying, if we took a cast iron frying pan that you could pick up at your local store and threw it into the sun, would that cause it to explode? Would the star's heat just vaporize the iron before it could reach the surface and repel it out into space? It seems like that would be too easy to end a star.
Will bleach explode in extreme heat?
Chlorine bleach is NaOCl is not explosive in and of itself. It decomposes at slightly over 100°C which is not going to be attained in a car even in full sun. If left a long time, it will start to breakdown with generation of oxygen. That can cause a lot of pressure and cause a breach in the (I expect) plastic container. And hot sodium hypochlorite solution is not pleasant -- the fumes are pretty pungent and it will, of course, bleach anything it comes in contact with. As it is completely soluble in water, flush with copious water and ensure good ventilation if there is a leak.
How can you be optimistic when you know that the sun will explode?
Anything that came into existance will come to end sometime.Same apply fot stars,All stars die, some more violently than others. Once our own Sun has consumed all the hydrogen fuel in its core, it too will reach the end of its life. Astronomers estimate this to be a short 7 billion years from now. For a few million years, it will expand into a red giant, puffing away its outer layers in form of pulses. Then it’ll collapse down into a white dwarf and slowly cool down to the background temperature of the Universe. I’m sure you know that some other stars explode when they die. They also run out of fuel in their core, but instead of becoming a red giant, they detonate in a fraction of a second as a supernova. So, what’s the big difference between stars like our Sun and the stars that can explode as supernovae? Mass. That’s it. Supernova progenitors - these stars capable of becoming supernovae - are extremely massive, at least 8 to 12 times the mass of our Sun. When a star this big runs out of fuel, its core collapses. In a fraction of a second, material falls inward to creating an extremely dense neutron star or even a black hole. This process releases an enormous amount of energy, which we see as a supernova. If a star has even more mass, beyond 140 times the mass of the Sun, it explodes completely and nothing remains at all.And talking about Earth it will become inhabited much before that,because due to expand of sun,life won't be possible.But who knows,with technological advancement we might find another parallel universe and start human race there...Future is unpredictable.
Can propane tank explode without fire?
Propane tanks, not in use, are prohibited from being stored indoors by fire codes & OSHA regs. Store them outdoors. The relief is set @ 240 PSI on most cylinders. Overfilling or excessive heat can cause the relief valve to do its *proper* job....relieve the interior pressure to prevent bursting of the tank. The vented gas can/will explode if it finds a source of ignition. The cylinder itself can/will explode in the resulting fire. ALWAYS store cylinders which are not in use OUTDOORS in a secured place.