# samtheflash82

Senior Members

68

1. ## 2 + 2 = 5

Or you could simply love Big Brother.
2. ## 1=-1? really?

because you need i to find the square roots of negative numbers.
3. ## speed of light hypothetical

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.
4. ## riddles

he says "I will die a slow a death."
5. ## SFN Blogs Opened

really cool! i just got mine up and running [link]

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.
7. ## The Secret of Black Hole and Hawking's End Theory

i feel like i just read a block of text that went through google's translator a few too many times.
8. ## Help! Solving Problems Using The Normal Distribution

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.
9. ## Physics of the Multiverse

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.
10. ## Group of Order 12 question

what just happened?
11. ## light in two places at once

well this is a bit unrelated but scientists have actually figured out how to teleport photons (light particles). so basically, yes, light can be in 2 places at once. but not in this context. http://cerncourier.com/cws/article/cern/28175 theres an article on the teleportation of photons.
12. ## A question about ice cubes

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

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.
14. ## darkness

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

i had a teacher who had a whole setup with a digital camera and computer monitor via USB from one of those fancy autotracking telescopes.

thanks for the link. i would read the textbook except for that the class doesnt begin until september. ive still got about 2 months left of freshman year.
17. ## my Moon Pictures.

very nice! i tried taking some pictures of a lunar eclipse with a 200mm (biggest i had at the time) heres what i got: Merged post follows: Consecutive posts mergedthat 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?
18. ## simple algebra help please.

yes, there are many methods of solving a system of equations. you could also use the addition method where you set up the equations so that when you add the together in column form, one of the variables cancels and you are left with a solution to the other.
19. ## some phenomenon?

I've seen that before. I always thought it was something to do with my glasses. Whaddya know...
20. ## Can someone explain superposition?

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

no problem
22. ## Is it even possible to curve bullets as seen in the recent movie "Wanted"?

despite the fact that the bullet curves anyway due to gravity and the Coriolis Effect, i would have to say that on pure kinetic force from a human being, a bullets trajectory cannot be altered when fired from a gun.

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?
24. ## simple algebra help please.

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
25. ## darkness

measuring the speed of darkness would be like trying to measure the amount of cold something has. its like saying you have \$3. how much money do you not have?
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