Science & Mathematics - 6 December 2006

is it possible to charge an online UPS with Sinewave Inverter ?
I have a UPS backup of 1 hour, and would like to increase that backup, but without changing UPS Batteries, Instead would like to go for Sinewave inverter which will charge those batteries as well as run my extra load............. Possible?????????

2006-12-06 23:58:55 · 2 answers · asked by Anis 2 in Engineering

2006-12-06 23:57:09 · 5 answers · asked by Anonymous in Chemistry

Please help, thanks.

2006-12-06 23:51:43 · 6 answers · asked by TennisFanatic 2 in Mathematics

If plants and trees can respond to light and sound, does that mean they can communicate with each other also? Are they conscious of their surroundings? Can trees sense other trees being cut down?

2006-12-06 23:49:30 · 18 answers · asked by Presea 4 in Botany

2006-12-06 23:48:56 · 2 answers · asked by devtrichy 2 in Engineering

2006-12-06 23:46:35 · 9 answers · asked by Anonymous in Biology

With all the telescopes etc we have now, how is it that nobody has ever taken a picture of the moon to show the old Moon rockets and vehicles that were left on the moon after the moon landings of the 1960's to show we actually went there and that they are still there??

2006-12-06 23:46:20 · 26 answers · asked by splandastic 3 in Astronomy & Space

2006-12-06 23:43:51 · 7 answers · asked by Crystalline As Dew 2 in Zoology

one with the highest number of element and compounds symbols will be chosen as best answer.

example
o - oxygen

2006-12-06 23:43:35 · 16 answers · asked by Sanket R 1 in Chemistry

A friend told me that she had read a article in newspaper that said someting to do with the rotation or the orbit of Mars has changed. As a result of that the weather on Earth is unusually different fo this part of the year. I am from South Eastern Europe. Something has changed with the weather this year. It is unusually warm for this season. I was warm weather like in spring a weak ago, but then again has changed sudenlly in true winter weather. Could this be the result of Mars disrupting our weather or the global warming has started showing its effects on the weather.

2006-12-06 23:41:28 · 4 answers · asked by idrangov 1 in Weather

cylinder and cone have equal radius of their bases abd equal height,if their curved surface areas are in the ratio 8:5.show the radius and the height of each has the ratio 3:4

2006-12-06 23:38:51 · 5 answers · asked by anushree 2 in Mathematics

1. How do we know we're not inside a black hole?
2. There are black holes within this universe.
3. Does that mean we can't be inside a black hole?
4. If not, then wouldn't that mean black holes can be inside black holes?

2006-12-06 23:38:24 · 6 answers · asked by manna eater 3 in Astronomy & Space

Another savenger this time I'm having to draw them

2006-12-06 23:37:42 · 6 answers · asked by miss Ann 1 in Botany

2006-12-06 23:37:41 · 11 answers · asked by BARROWMAN 6 in Mathematics

2006-12-06 23:34:41 · 6 answers · asked by amnesty 2 in Zoology

I lack the knowledge of sex of most parts of females and little of males.

2006-12-06 23:30:17 · 3 answers · asked by ? 1 in Biology

2006-12-06 23:27:47 · 4 answers · asked by Anonymous in Astronomy & Space

My Math is High School Math. However, I've been asking this question to Math teachers over and over and never really got a decent answer. So, what's wrong with this my proof below that Zero is an odd number?

Zero Factorial = 1 (0!=1). I don't know why. That's what I've been always told though.

Even or Odd goes in this fashion AFAIK:

* even × even = even;
* even × odd = even;
* odd × odd = odd.

So, whetever the equation is which comes up with 0!=1 it doesn't contain an even number. Hence 0 is an odd number.

2006-12-06 23:26:12 · 15 answers · asked by aipop 2 in Mathematics

2006-12-06 23:24:00 · 5 answers · asked by Anonymous in Chemistry

when a car starts its journey on a straight and level road, it accelerates. however, the acceleration becomes less until it reaches a steady speed and cant go faster. even a very powerful engine will not make a difference. Why??

this is the question. pls help. 10 points for the best and most understandable answer.

2006-12-06 23:16:06 · 9 answers · asked by Anonymous in Physics

I'm not for sure but I thought there was a mountain in maybe South America? tht flows up the mountain rather than down it bc of water pressure or sumthin. If u guys could help me out tht'd b great!

2006-12-06 23:14:26 · 8 answers · asked by ~*alex*~ 2 in Geography

2006-12-06 23:12:56 · 2 answers · asked by Natty B 1 in Earth Sciences & Geology

would a 100,000 + volt stun gun fry the onboard engine management microprocessors when triggered to a vehicles' ground,i.e.:frame,body panels,door handles,etc. ???

2006-12-06 23:11:29 · 2 answers · asked by wildmanc5 1 in Physics

would a 100,000 + volt stun gun fry the onboard engine management microprocessors when triggered to a vehicles' ground,i.e.:frame,body panels,door handles,etc. ???

2006-12-06 23:09:53 · 3 answers · asked by wildmanc5 1 in Engineering

When I speed up natural sound 25X, someone clearly says "hello" on my recording. Where can I submit this for further analysis?

2006-12-06 23:04:24 · 8 answers · asked by manna eater 3 in Paranormal Phenomena

2006-12-06 22:52:19 · 18 answers · asked by Akilesh - Internet Undertaker 7 in Physics

(i) cos (-A)

Please show workings so that I can understand.

2006-12-06 22:45:14 · 4 answers · asked by Anonymous in Mathematics

I plan to use them as the light beams for my home security system. I find with normal light beams the lens tend to mist up in wet weather. A laser could be aimed at the sensor direct. The laser can also be greatly reduced in brightnesss by pulsing it to be on for only 1 milisec in 40 this also reduces the power in case anyone looked directly into it.

2006-12-06 22:44:16 · 8 answers · asked by Anonymous in Engineering

Also tell me how to make it.for ex-solar cell,simple robot,water level detector etc
Hope you will help me.

2006-12-06 22:42:29 · 2 answers · asked by chinmay 1 in Physics

experiment done in my lab taking constant voluumes of a unknown substrate,elastase enzyme and increasing concentrations of elastase enzyme inhibitor. A graph between absorbency and enzyme inhibitor concentration revealed the absorbency increased as we increased the enzyme inhibitor concentration. Can i say from the experiment what is the type of inhibition. If not what experiment should be done to find the mode of inhibition of enzyme

2006-12-06 22:42:01 · 3 answers · asked by Murty V 1 in Chemistry