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BlueCosmology

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    Spacecraft Engineer
  1. You've got that the wrong way round. Newton's gravitation is instantaneous. General relativity is limited by the speed of light.
  2. I don't think this question could of possibly been any more obvious about the fact that it was talking about working in a lab. If you're working with benzene in the vacuum of space I'd recommend a spacesuit. Not relevant, but hey.
  3. ...? Which is exactly why gas masks are an emergency backup.
  4. In a lab that should never happen. That is the whole point of a fume hood. If any substance is escaping the fume hood, your fume hood is not adequate for the purpose.
  5. You really shouldn't be asking a game forum for advice on toxicology precautions. Consult your safety data sheet and the masks manual. If in doubt contact the manufacturer. Don't be basing your handling of toxic chemicals over what anonymous people on a game forum tell you. http://www.cpchem.com/msds/100000068511_SDS_US_EN.PDF Safety data sheet for benzene. "Wear a supplied-air NIOSH approved respirator" so no, since a mcu-2/p gas mask is not air supplied it would not be sufficient. And as already discussed a gas mask is an extra emergency precaution. An adequate fume hood should be your main concern. If you do not think your fume hood is good enough and as such require to wear a respirator, you definitely do not have the facilities to work with toxic chemicals no matter how good your gas mask is. To add to this, if you do not know how to find the answer to this question yourself you are DEFINITELY not qualified to work with toxic chemicals and most certainly should give up on whatever project it is you wish to work on until you are adequately trained.
  6. Ok, I'm tired of arguing with a troll now so this will be my last comment to you. Heavy duty and super heavy duty are specific terms for batteries. They have legal requirements to be specified as one. They are not just advertisement terms. If that was the case why in the world do you think people would advertise them as heavy duty when others are advertising as super heavy duty? Everyone would assume that super heavy duty are superior for energy content (which they are). Also did you honestly just tell someone that refereed to power as watts that power is joules per second. Do you know what the word watt means?
  7. Would you like me to go through every single step with you? I didn't think having to go to the point of showing every multiplication would be necessary but here you are. Apparently explaining it all isn't enough, I have to go through every tiny step of calculation. To melt aluminium requires raising it to its melting point of 600C. Aluminium has a very high specific heat for a metal of 1kJ/kgK, meaning for every degree C it's raised requires 1 kilojoule. Everyday temperature is close to 0C, so 600kJ (600*1) required to raise aluminium to melting point. Then aswell as raising a material to melting point, there is extra energy required to melt it. I'm sure you'll of noticed before that water for instances in a freezer gets very cold much faster than it freezes. This is because of the extra energy needed for a phase change. The latent heat of fusion for aluminium is 500kJ, meaning it takes 500kJ to change solid aluminium at melting point into molten aluminium at melting point. So in total ~1100kJ (that's 600+500, the energy to get the aluminium to melting point plus the energy to melt it) are required to melt aluminium. A heavy duty battery has 26 amp hours, an amp hour is 3.6kJ per volt. 26*4*6=100*6=600kJ contained in one battery two batteries have double the energy, 600kJ*2=1200kJ. So two heavy duty 6 volts batteries contain ~1200kJ.
  8. I assume you're just a troll now, because not only did I not link a forum (I linked google) you then went onto link a different battery. You know heavy duty and super heavy duty are actually terms in the electronics industry right? They mean things. A super heavy duty battery IS NOT a heavy duty battery. There is a reason they have different names. Ironically, everything you are saying is ignorance. Power is entirely irrelevant in this. Again, it almost certainly wouldn't be possible with the power output of 2 lantern batteries either BUT THAT DOES NOT MATTER. The power could be anything, there is not enough energy to melt a kilo of aluminium in two lantern bateries. I have argued it with competence I have not just stated it. Xannari was asked if he used the batteries for the power supply or not and he stated that yes he did.
  9. You're acting like some things just aren't obviously incorrect. There is no way, at all, that this is true. If you don't know enough about physics to tell instantly that it isn't true, fine, but that doesn't mean nobody does. If I told you that I'd just managed to catapult myself to the center of the sun with a spoon and elastic band, would you believe me? Would you think it's reasonably possible that I'm telling the truth? No. And that is no more obviously wrong than this.
  10. Sorry, but I know someone on the internet isn't going to manage to break conservation of energy with two batteries and a brick. Not sure why you've put power in quotation marks when referring to what I've claimed, when I have never mentioned power. The power is entirely irrelevant, it could be infinite or it could be close to 0, either case there is not enough energy to melt a kilo of aluminium. I also don't see why you'd claim I made the amp hours of a heavy duty battery up rather than just Google it. https://www.google.co.uk/search?q=amp+hours+of+a+6V+heavy+duty+battery&oq=amp+hours+of+a+6V+heavy+duty+battery&aqs=chrome..69i57.1683j0j4&client=ms-android-h3g-gb&sourceid=chrome-mobile&espv=1&ie=UTF-8 First result. Nope, that's another way it's almost definitely not possible with two batteries but it doesn't matter. The energy in two batteries just isn't enough, it doesn't matter if all the energy is released at once or over years. Very simple to show it will not work in the slightest. Anyone with any knowledge in physics knows this will not work. Anyone that accepts conservation of energy, knows that I have shown this cannot work.
  11. No, there's no real advantage to doing so (the only notable case where there would of been an advantage is the failure of that Mars probe) whereas there are a lot of disadvantages. Mainly the cost of replacing signage, and the confusion (and hence damage) that will be caused in the switchover.
  12. Because there really isn't any debate to be had. He is just blatantly lying, and when presented with undeniable evidence of such his rebuttal is to just tell me to go electrocute myself.
  13. Not true at all. Infact, famously not so. Anyone with any knowledge of metallurgy knows this to be false, aluminium is very famously energetically difficult to melt. Aluminium has a very high specific heat and a high latent heat of fusion for a metal. The melting point of aluminium is ~700C, the specific heat is ~1Kj/kg, the latent heat of fusion is ~500Kj/kg. Meaning for one kg of aluminium it takes 1200Kj to melt. Steel has a higher melting point (1400C) but a much much lower specific heat ~1/2, and a much lower heat of fusion ~200Kj/kg. Meaning for one kg of steel it takes 900Kj to melt
  14. You knew the name of it was an arc furnace, yet you have never heard of it before you invented it yourself. Hmm....
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