Science & Mathematics - 15 November 2007

Why is it they’re in the normal range of human hearing only after they’ve been recorded on an electronic device?

2007-11-15 03:38:48 · 5 answers · asked by Anonymous in Paranormal Phenomena

An amount of Chlorine gas weighs 5.67g and reacts with 8.90 g Oxygen to form a compound. What is the empirical formula?

Ok is the stuff with the grams there to throw me off? Isn't the empirical formula just Cl2O? What's with this question?

2007-11-15 03:36:40 · 1 answers · asked by Burnt Toast 1 in Chemistry

2007-11-15 03:34:11 · 3 answers · asked by Anonymous in Mathematics

Ok, I was reading an article the other day, that astronomers have found earth and mars like planets 400000 light years away, or something like that.

I am new to this so someone kind of explain this to me. So it take 400,000 light years for the light to reach us, so we can see it here from earth. So there is a possibility that those planets could have evolved, and be bearing intelligent life right now but since the great distance, we are just seeing the beginnings of it. Just want someone to say if I am on the right page. It is mind boggling

2007-11-15 03:33:31 · 6 answers · asked by Anonymous in Astronomy & Space

2007-11-15 03:31:03 · 4 answers · asked by vjohnson13 1 in Mathematics

2 < 2x - 1 < 7

I got x < 4.

Right or wrong?

2007-11-15 03:29:09 · 3 answers · asked by wrongnumber 1 in Mathematics

2007-11-15 03:27:56 · 7 answers · asked by Josh W 1 in Physics

which kind of spider is the most dangerous ? :
i've heard of : Black widow , Funnel-web spider , wandering spider , daddy long-legged spider..
among these , which is most venomous / dangerous ? And is Tarantula dangerous to us ?

2007-11-15 03:22:51 · 9 answers · asked by Anonymous in Zoology

Try to give me the best explanation that you possibly can please kiddos.

2007-11-15 03:22:01 · 8 answers · asked by Anonymous in Biology

The flight from Tehran to Sydney takes 10 hours.
The flight from Sydney to Johannesburg takes 10 hours.
The flight from Johannesburg to Washington takes 10 hours.

How long does it take to fly from Sydney to Washington?
(the numbers are slighly doctored, but not much)

2007-11-15 03:21:37 · 5 answers · asked by Alexander 6 in Mathematics

For example, instead of 24 hours in a day, it would be 100 hours a day.

I was just curious.

Is it possible?

2007-11-15 03:18:34 · 11 answers · asked by Duchess of Cookieshire 6 in Astronomy & Space

2007-11-15 03:17:28 · 1 answers · asked by lordosseikweku 1 in Medicine

help

2007-11-15 03:15:47 · 6 answers · asked by mahaylaa2002 1 in Mathematics

please help me!

2007-11-15 03:12:24 · 2 answers · asked by lele 2 in Mathematics

How is this possible? How big is the asteroid? How big are/is the moon(s)?
So, If one of these particular asteroids were to hit earth, the asteroid and its moons would hit?

2007-11-15 03:11:30 · 4 answers · asked by Jansen J 4 in Astronomy & Space

resulting mass is 0.546g.the cobalt is isolated and weighs 0.248g.what is the formula of the hydrate?
A)DETERMINE the number of moles of water lost from the hydrated unkown
B)DETERMINE the number of moles of cobalt collected
C)DETERMINE the number of moles of chloride in the compound
d)What is the mole ratio of cobalt to chloride(cobalt is equal to 1: )
E)WHAT is the mole ratio of cobalt to water lost (set cobalt to 1: )

2007-11-15 03:10:11 · 1 answers · asked by mohjd s 1 in Chemistry

I want to buy a telescope to view the sky, moon, planets, galaxies, etc... I want it for terrestrial observation too. I found 6 telescopes that I like. Now i don't know which of these it's better. If you have better suggestions don't hesitate to tell.

here are the links:

http://www.astroshop.de/en/telescopes/skywatcher/refractors/skywatcher-120-600mm-az-3
http://www.astroshop.de/en/telescopes/skywatcher/refractors/skywatcher-102-1000-eq-3-2
http://www.astroshop.de/en/telescopes/vixen/refractors/fraunhofer-achromats/porta-a80mf
http://www.astroshop.de/en/telescopes/vixen/refractors/fraunhofer-achromats/porta-a80m
http://www.astroshop.de/en/telescopes/vixen/refractors/fraunhofer-achromats/porta-a70lf
http://www.astroshop.de/en/telescopes/skywatcher/refractors/skywatcher-120-1000mm-eq-5

I hope you can help me :D

2007-11-15 03:09:00 · 5 answers · asked by Anonymous in Astronomy & Space

2007-11-15 03:06:24 · 3 answers · asked by suresh rayalu 1 in Engineering

A lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray itself is 0.200 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.00 kg plate of food and a 0.275 kg cup of coffee. Obtain the force T exerted by the thumb and the force F exerted by the four fingers. Both forces act perpendicular to the tray, which is being held parallel to the ground.
T = N (downward)?
F = N (upward) ? link to image:http://img251.imageshack.us/my.php?image=0968lr6.gif

2007-11-15 02:59:56 · 2 answers · asked by Cameron 2 in Physics

How long will it be until a telescope is made which can see planets in detail in other solar systems?

2007-11-15 02:59:04 · 8 answers · asked by scott e 1 in Astronomy & Space

I had a book thrown at me in a empty room !

2007-11-15 02:58:36 · 16 answers · asked by J 2 in Paranormal Phenomena

2007-11-15 02:57:10 · 1 answers · asked by Anonymous in Biology

2007-11-15 02:56:58 · 7 answers · asked by Anonymous in Biology

Who greeted the astronauts on the deck of the carrier.

What were the names of the first two shuttle astronauts?

Who was the last astronaut to be on the Moon's surface?

2007-11-15 02:56:44 · 2 answers · asked by Anonymous in Astronomy & Space

Herbie eats excessive amounts of hotdogs each week. They are preserved with sodium nitrite, but his stomach is slowly finding out as it's acid converts the sodium nitrite to nitrous acid, a weak mutagen. In the lining of Herbie's stomach three little cells each experience a mutation in their DNA and it happens to be in the very same gene--a kinase gene called src. (Src is an example of what Dr. Howard Temin called a "proto-oncogene.) But the three little cells each experienced a different kind of mutation in that gene:

Cell #1's src DNA was altered so that it's product is present in normal amounts, but no longer functions.

Cell #2's src DNA was altered so that it produces almost no gene product at all.

Cell #3's src DNA was altered so that it's gene product has normal function but is overproduced.

Which cell is more likely to become cancerous and why?

2007-11-15 02:55:19 · 2 answers · asked by Carl B 1 in Biology

2007-11-15 02:50:31 · 1 answers · asked by Christina S 1 in Chemistry

I am an electronics & communication engineering student.I want to present a paper in some interesting topic, which is also the latest trend.

2007-11-15 02:48:13 · 1 answers · asked by ((Gaining knowledge.) 2 in Engineering

Still not getting it.

The combustion of 2.209 grams of elmonane, a hydrocarbon with a molar mass of 218.00 grams/mole, released 44.31 kJ of heat energy. What is the molar heat of combustion for elmonane (kJ/mol)?

For this I worked it out as:
2.209/218= 0.0101mol E (E for elmonane)
44.31/.0101 = 4387.13

But my answer is wrong. What am I supposed to be doing? And what is the right answer?

2007-11-15 02:44:52 · 2 answers · asked by Smoke20 1 in Chemistry

Assume density of solution is 1.0

What volume of concentrated hydrochloric acid is needed to neutralize this amount of sodium hydroxide solution?

2007-11-15 02:44:11 · 3 answers · asked by Anonymous in Chemistry

ok so there is a type A type B type AB and type O.. what are the percentages for average people haveing these blood types?!!

2007-11-15 02:43:10 · 4 answers · asked by Anonymous in Biology