Recent content by kaleidoscope

Do you know if radioactive poisoning can give you cancer? I think I read that Marie Curie died from cancer. And secret Alexander Litvinenko died not long ago from radioactive poisoning too. I wouldn't rule out that intelligence agencies in the "first" world have technologies we wouldn't...

I was wondering if the early calendars developed by mankind can be considered engineering or physics inventions, as they were developed to count or measure time. Any opinions about this?

Is it true that a series of small magnitude earthquakes help prevent a large magnitude eartquake? Aren't earthquakes basically independent events from a statistical point of view?

Which android science apps would you recommend to your colleagues?

Nice. How did you calculte the 0.75 degrees shift and the 80 year interval?

So this weekend I read a little about the Dresden Codex of the Maya (their astronomical log) and played a little bit with Stellarium trying to imagine the sky they saw. I noticed something that I think is interesting, Venus wasn't very visible during the equinox every four years because the...

If maths is about finding patterns... then. if my parrot learns by itself that everytime I grab the food bag is time to eat and gets excited, can we say it has a very rudimentary/vestigial sense of math?

NOT at all! BTW, I think ten degrees would be to close to see, but I'm looking for a more informed opinion.

What is the minimum angular distance from the Sun for Venus to be visible TO THE NAKED EYE?

I'm trying to find the most intuitive way to count to 20 using only the fingers of your hands. Right now my favorite is using 4 fingers on one hand to count groups of 5 from the other. Any other ideas? Please participate! :smile:

If there is a leveled pipe that gets increasingly narrow, the fluid in it will gain speed/momentum, right? Can you use that extra speed to lift the water (create pressure)? What equations would describe this?

I'm sorry for my bad netiquette. :(

Exactly! This is the function I've being using. What I wonder is if there is a more simple version of it. Thank you very much anyways!

"This pharse has three misstakes." How many mistakes does this phrase have? [SIZE="6"]"This pharse has three misstakes." How many mistakes does this phrase really have?

that is the natural way, a radian measures the length of the arc of the circle. 2pi radians is the length of the circumference of a circle of radius 1 and so on.