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samtheflash82

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Posts posted by samtheflash82

  1. that sounds about right. Alastair Reynolds had a similar scenario to this in his science fiction novel Revelation Space. In the novel (fiction, of course) radio transmissions were coming being heard in "chipmunk" style when they ship was travelling near the speed of light.

  2. ok i've got one, You've probably all heard it before, but anyway:

     

    A man is walking in the desert, he is captured by some local tribesmen. They take him to their king.

    The king says to the man: "you have a chance to say one sentence, it has to be true or false. If you say a true sentence I will kill you quickly,If you say a false sentence, I will kill you slowly."

     

    The man says one sentence, and the cheif has to let him go.

     

    Now I've heard many plausible answers to this riddle, all correct, and because of that I'm only going to accept the one I'm thinking of HEHEHE :D

     

    have fun with that one if you dont already know it!!!

     

    he says "I will die a slow a death."

  3. You need to find a kind of reaction that runs on sunlight

     

    sunlight would be extremely scarce on uranus. i cant think of a way to generate the kind of heat needed for normal respiration that we have on earth that would work on uranus.

     

    i know that carl sagan postulated that it would be possible for creatures to live on jupiter or saturn in one of his books but i dont remember which one.

  4. if the average man is 175 cm tall and the average woman is 168 cm tall than the probability that the average man will be taller than the average woman is 100%. i think what you want to know is the probability that a random man will be taller than a random woman and to do that i think you need to know the data used to generate those averages.

  5. According to many theories (including string theory i believe) there is a type of multiverse which contains many many other universes. In my understanding, the laws of physics apply only inside a given universe. With that what can we say about the physics in the multiverse? might these multiverse physics allow for multiple multiverses? discuss.

  6. Since the water loses energy, then the answer must be.. choice A! Thanks so much. I totally forget that heat goes from high concentration to low concentration!!! :doh:

     

    yes, always remember; "source to sink". the source of heat is the water, the sink for the heat is the ice cube.

  7. I just got home from his talk with my autographed copy of Physics of the Impossible. Hearing him speak in person was a very interesting experience and he made everything extremely easy to grasp. After I read this book I do plan on reading his others. I also hope to hear Dr. Kaku speak in some lectures, possibly as a student. That would be incredible.

  8. We can measure how fast darkness appears or disappears. You can move towards or away from a state or condition and darkness is a state or condition.

     

    but the result you get for measuring how fast darkness appears or dissapears, if you were accurate wouldnt that be the speed of light?

  9. very nice! i tried taking some pictures of a lunar eclipse with a 200mm (biggest i had at the time) heres what i got:

     

    dsc0009n.jpg


    Merged post follows:

    Consecutive posts merged

    that image is cropped by the way. im going to try to get a nice telescope. also, does anyone have any advice on capturing the night sky? for example, how would i get the milky way arms to show very vividly? i know i need a long exposure but should i set a high ISO or lower ISO. also, does the f number make a difference when shooting broad views of the sky?

  10. Flip a coin with your eyes closed. It could either be heads or tails, but you won't know until you look. Superposition is like that, except that they say that both states exist superimposed until you look, not just that you don't know.

     

    that reminded me of the whole; "if a tree falls in a forest..." thing.

  11. After taking the required general science course my freshman year of high school, my teacher suggested that i take a more advanced course in chemistry. The only knowledge I have on the subject is what was taught in the general science class. This includes balancing reaction, breaking and forming bonds, exothermic, endothermic, not a whole lot. is there any beginner type book you would recommend to help me get a bit of a head start?

  12. It's called a system of equations. what you can do with something like that is solve for 1 variable (I'll use x) and then substitute in the second equation. I'll use your equations as an example.

     

    the first equation

    x+2y=10

    x=10-2y

     

    then we can substitute this value for x in the second equation.

    3(10-2y)+4y=8

    30-6y+4y=8

    -2y=-22

    y=11

     

    then we can substitute for y back into the first equation and solve for x

    x+2(11)=10

    x+22=10

    x=-12

    y=11

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