Science & Mathematics - 11 August 2007

What will be the tension in the string holding a ball which is being swung in a circle of raidus .7 m if the ball is going 2.5 rev/s. Assuming the sytem is in free fall?

What is the tension if the system was on a sationary with respect to surface of earth, w/the ball being swung in a vertical circle, when the ball is at the top of its arc.

What if the ball is at the bottom of the arc?
What if the ball is at 1/2 height?

2007-08-11 14:33:21 · 3 answers · asked by e=mc^2 1 in Physics

SO I LIVE IN AZ WHEN IS THE METEOR SHOWERE? I REALLY WANNA WATCH IT I LIVE KINDA CLOSE TO CHANDLER IS THERE NE GOOD PLACES TO WATCH IT? CAN U SEE IT FROM NE WHERE? I REALLY REALLY WANNA KNO WHEN THX LOVE U ALL PLZ ANSWER!!!

2007-08-11 14:30:10 · 4 answers · asked by <3 bay bay 1 in Astronomy & Space

Just noticed that the showers were coming, where, when? any more details please. I am in Australia, and I wasn't sure if I would be able to see from here? Thanks Danial

2007-08-11 14:28:43 · 3 answers · asked by Anonymous in Astronomy & Space

2007-08-11 14:26:05 · 9 answers · asked by Drew 1 in Astronomy & Space

also, how long will it last?

btw i live in middle tenn. and i go by central time and not eastern

NEED TO KNOW QUICKLY!!!!!

2007-08-11 14:25:55 · 8 answers · asked by o c 1 in Astronomy & Space

1)Which of the following forms a molecular solution in water?
a)NH4CH3COO
b)C6H12O6
c)Na3PO4
d)SrSO4

2) The predominant acid-base reaction between H2O22 and H2O is
a)H2O22 + H2O --> H3O2+ + OH-
b)H2O22 + H2O --> 3OH- + H+
c)H2O22 + H2O --> H3O+ + HO2-
d)H2O22 + H2O --> 2H2O + O2-

explanations would be greatly appreciated

2007-08-11 14:23:50 · 1 answers · asked by chubby chicken. 1 in Chemistry

2007-08-11 14:22:49 · 6 answers · asked by jenn v 1 in Astronomy & Space

is the following true?:

Two moons on August 27, 2007

*27th Aug the Whole World is waiting for.............*


Planet Mars will be the brightest in the night sky
starting August.

It will look as large as the full moon to the naked
eye. This will culminate on Aug. 27 when Mars comes
within 34.65M miles of earth. Be sure to watch the sky
on Aug. 27 12:30 am . It will look like the earth has
2 moons. The next time Mars may come this close is in
2287.

Share this with your friends as NO ONE ALIVE TODAY
will ever see it again

2007-08-11 14:22:30 · 14 answers · asked by Anonymous in Astronomy & Space

I've seen on most periodic tables it is listed as a solid, yet on some others it is listed with mercury and bromine as a liquid element. What is it truly listed as?

2007-08-11 14:22:04 · 5 answers · asked by Zack 1 in Chemistry

OK, I watched a show on The History Channel the other evening and it talked about the end of the world. It stated that several anciet prophets like Nostra Domas and ancient calendars from the Mayans and Chinease all predict the end of the world in the year 2012. More specifically, December 21, 2012.

The thing that made me really wonder was that in the year 2012, the earth and sun will be aligned with the exact center of the milky way. The show stated that as the earth passes into a different magnetic field, the poles will shift, in a matter of weeks or even hours. This would cause worldwide earthquakes and tsunamis, eradicating life as we know it.

Is this possible, or even true? Or is the History Channel passing specualtion off as truth?

2007-08-11 14:22:01 · 13 answers · asked by mabosse 1 in Astronomy & Space

I've tried searching this but apparently I'm not putting in the right words, because I can't find the answer.

At night, how come sometimes I can see clouds at night and sometimes I can see stars at night.

Why isn't it *ALWAYS* dark with stars? One night I see clouds, one night I see stars...

2007-08-11 14:18:36 · 3 answers · asked by Anonymous in Astronomy & Space

Is there going to bea meteor shower on Sunday August 12?

2007-08-11 14:15:01 · 10 answers · asked by Anonymous in Astronomy & Space

2007-08-11 14:14:28 · 10 answers · asked by Anonymous in Astronomy & Space

An email forward is going around. I wanted to know if it was possible for them to look simular in size, as if they are two moons.

2007-08-11 14:09:13 · 2 answers · asked by Pafuti H 1 in Astronomy & Space

I live in Phoenix, AZ. Does anyone have suggestions? Where should I look?

2007-08-11 14:08:33 · 8 answers · asked by U Wish 2 B Me 3 in Astronomy & Space

pacific 4am is central 6am and central 6am is eastern 7am. so which time do we see it in?

2007-08-11 14:08:04 · 6 answers · asked by Anonymous in Astronomy & Space

How many people are going to be hit in the head by the meteors this weekend

2007-08-11 14:04:23 · 2 answers · asked by Mercury 2010 7 in Astronomy & Space

2007-08-11 14:03:18 · 2 answers · asked by lourise n 1 in Astronomy & Space

I know how vaccines are made and how the virus is weakened...but my question is where do they get the virus that they retard in the first place? Do they grow it, find it naturally? How? Please Help

2007-08-11 13:58:17 · 2 answers · asked by Anonymous in Medicine

I know that matter emits and absorbs radiation, as shown by the standard model in detail. However, I am taught that matter itself acts as a wave, different waves corresponding to different particles. Is there a 'matter spectrum' all it's own or can it be considered an extension of the electromagnetic spectrum? (and if so, where on the map is it?)

2007-08-11 13:57:11 · 6 answers · asked by Rose P 1 in Physics

I mean are there really other planetsand aleins and is it scientificly proven? well what do you think just give me your opinion.

2007-08-11 13:54:18 · 8 answers · asked by Mogan 1 in Astronomy & Space

2007-08-11 13:52:39 · 6 answers · asked by Toby . 1 in Astronomy & Space

http://science.nasa.gov/headlines/y2007/11jul_greatperseids.htm

2007-08-11 13:50:58 · 2 answers · asked by Anonymous in Astronomy & Space

2007-08-11 13:50:19 · 5 answers · asked by rhozecon 1 in Astronomy & Space

2007-08-11 13:47:26 · 2 answers · asked by toolmaker 1 in Physics

does it contain sulfer i have three no"S and one yes but I've been told both answers so don't know what to believe...

2007-08-11 13:42:07 · 3 answers · asked by Anonymous in Medicine

I have heard that rumor many times

2007-08-11 13:39:18 · 22 answers · asked by Connor G 1 in Astronomy & Space

What is the best time to see it?

2007-08-11 13:37:35 · 2 answers · asked by und_ich_fliege 4 in Astronomy & Space

Supposed UFO Probe in California------------
http://youtube.com/watch?v=Q_W-tPmk19g

Like i said-probably fake but REAL coll and kinda freaky

2007-08-11 13:35:42 · 8 answers · asked by TEN 1 in Paranormal Phenomena

2007-08-11 13:34:19 · 12 answers · asked by Keea 1 in Mathematics