Science & Mathematics - 26 December 2007

it is 70 degrees right now. I cant stand it! it is too cold

2007-12-26 12:25:59 · 6 answers · asked by green 3 in Weather

We all know that bats fly around in circles, trying to find their way through the dark by echo-location, right? But last night, my friend and I saw a bat flying straight, as if it knew where it was going! How weird is that?

2007-12-26 12:25:23 · 7 answers · asked by Anonymous in Zoology

2007-12-26 12:23:29 · 7 answers · asked by Anonymous in Weather

OK, I've always loved weather and I looked up the job of meteorology and the facts were that it takes many years of college... works 7 days a week... works on holidays... and is under pressure to meet the forecast deadline. It was all so negative.... is it really that bad a job....? If you are or have been or know anything about the job please answer.

2007-12-26 12:22:28 · 5 answers · asked by raknerudz 3 in Weather

i believe that aliens exist and that there is life somewhere other than on this planet..i would like to know what others think about this...

2007-12-26 12:21:02 · 27 answers · asked by ale 2 in Astronomy & Space

prove the identity

2/1+cosx-Tan^2(x/2)=1

HOw did you do it?

2007-12-26 12:20:20 · 5 answers · asked by green 3 in Mathematics

2007-12-26 12:19:05 · 4 answers · asked by Anonymous in Mathematics

prove identity
(1+Tanx)(Tan2x)= 2Tanx/1-Tanx
How is this possible? i tried everything! i have spent two hours trying to figure this one out but i cant!

2007-12-26 12:16:03 · 4 answers · asked by green 3 in Mathematics

Note: the term is written as a1, the 1 is small which is below the a.


The first four terms in a sequence, and the rules that define them, are shown below.

a1 = 4

a2 = 2a1 + 3

a3 = 2a2 + 3

a4 = 2a3 + 3


What is the value of a4, the fourth term shown in the sequence above?

A. 25
B. 35
C. 41
D. 53

what does the meaning of the symbol a1?

2007-12-26 12:11:15 · 18 answers · asked by Anonymous in Mathematics

A 4.00 kg block is pushed along the ceiling with a constant applied force of 85.0 N that acts at an angle of 55.0 degrees with the horizontal. The block accelerates forward at 6.00m/s/s. determine the coefficient of kinetic friction between the block and the ceiling.

2007-12-26 12:10:45 · 3 answers · asked by Anonymous in Physics

ok so how are air pressure and air temperature related, and what is one experiment you could do to show the relationship between the two.

2007-12-26 12:08:47 · 6 answers · asked by tori t 1 in Weather

I heard the sun burns an inch in diameter every minute but that doesn't make much sense to me.

2007-12-26 12:06:22 · 10 answers · asked by Nicholas G 3 in Astronomy & Space

I have 2 email addresses. One is for Y/A...and I stay on it most of the time. The other one is more anonymous. It's the first one I had till I had to change because my sister couldn't figure how to unblock me. I want to use the 2nd one (my original address) as an email address for those on Y/A. I can't give them the other one because it has my real name on there.I want to stay anonymous. Is there any way I can be notified on the Y/A address that I have one (or more) on the other address? Thanks.

2007-12-26 11:57:49 · 5 answers · asked by Deenie 6 in Paranormal Phenomena

... I seen a programme with a german pathologist, who showed that it's not the water that kills it's being in the water that kills because of a reaction where your body essentially axphixiates itself.

Is there any truth in this.

2007-12-26 11:57:21 · 16 answers · asked by Connor Q 1 in Biology

Which one of the following molecules has a dipole moment?
a. BeCl2
b. Br2
c. BF3
d. IBr
e. CO2

2007-12-26 11:56:58 · 4 answers · asked by Anonymous in Chemistry

Complete this sentence: The PCl5 molecule has ________.
a. nonpolar bonds and is a nonpolar molecule
b. nonpolar bonds but is a polar molecule
c. polar bonds and is a polar molecule
d. polar bonds but is a nonpolar molecule

2007-12-26 11:56:34 · 5 answers · asked by Anonymous in Chemistry

2007-12-26 11:56:31 · 13 answers · asked by x115z 1 in Mathematics

Which one of the following molecules is nonpolar?
a. NH3
b. OF2
c. CH3Cl
d. H2O
e. BeCl2

2007-12-26 11:56:06 · 5 answers · asked by Anonymous in Chemistry

I work for a graphic equipment supply company that sells dry vacuum/pressure pumps and I have to create a chart at work, using Excel. On the (X) axis, it will be PSI (pounds per square inch/measurements 1.38 to 8.50) and on the (Y) axis, it will be CFM (cubic feet per minute/measurements from 0 to 500 with) . What formula do I use? For example, my PSI is 1.38...how do I figure out the CFM? Am I looking at the information the wrong way? Any help would be appreciated. I am really behind deadline

2007-12-26 11:54:51 · 2 answers · asked by Anonymous in Engineering

I read in a science journal that the CO2 from a fart causes butterflys to die.

2007-12-26 11:54:09 · 8 answers · asked by bigdjhumke 2 in Earth Sciences & Geology

4y-10y+y+34= 5y+30-2y

2007-12-26 11:53:35 · 12 answers · asked by MMM Ice Cream 1 in Mathematics

If an animal in a zoo accidently kills a person it is always put down? Is this really fair and should be done everytime? The animal does not know any better and often things like this are the zoo's fault and the animal is just acting on intinsct. When we try to rebuild endangered animals through captivity and then kill one due to an attack it seems unwise.

2007-12-26 11:52:16 · 15 answers · asked by Anonymous in Zoology

alkali metal carbonate
don't decompose by heating but do they melt or sodiumcarbonate only?

2007-12-26 11:51:42 · 4 answers · asked by roody16 1 in Chemistry

According to the VSEPR theory, which one of the following species should be linear?
a. H2S
b. HCN
c. BF3
d. H2CO
e. SO2

2007-12-26 11:50:57 · 4 answers · asked by Charlie W 1 in Chemistry

Use bond energies to estimate the enthalpy of formation of HBr(g).

H2(g) + Br2(g) 2HBr(g)

BE(H—H) = 436 kJ/mol
BE(Br—Br) = 192 kJ/mol
BE(H—Br) = 366 kJ/mol
a. +262 kJ
b. –52 kJ
c. –104 kJ
d. +104 kJ
e. +52 kJ

2007-12-26 11:48:44 · 1 answers · asked by Charlie W 1 in Chemistry

Hey guys, found this insect on my bathroom floor, in my fifth level apartment, Sydney Australia. At first I thought it was a Cricket/Grasshopper, but it couldn't jump. It was about 5cm long, and emitted this sticky black liquid when I caught it.

http://img151.imageshack.us/my.php?image=dsc00723ew2.jpg

http://img182.imageshack.us/my.php?image=dsc00724dv0.jpg

Thanks!

2007-12-26 11:48:22 · 6 answers · asked by MS 2 in Zoology

I live around Thousand Oaks, Camarillo, or Simi Valley. I am looking for real hair wigs. Not fake. And UV lamps. Not big. Medium. Thank you.

2007-12-26 11:46:27 · 3 answers · asked by anonymous 1 in Earth Sciences & Geology

The total number of bonding electrons in a molecule of formaldehyde (H2CO) is ________.
a. 3
b. 4
c. 6
d. 8
e. 18

2007-12-26 11:45:57 · 2 answers · asked by Anonymous in Chemistry

HNO3

(NH4)2SO4

Br2

CuSO4 5H2O





the numbers are all the little ones, ya know?
if you could tell me how to do them too that'd be GREAT.


:)

2007-12-26 11:43:01 · 4 answers · asked by allyp 2 in Chemistry

please someone help don't understand

Driving down a mountain, Tom finds that he has descended 1800 ft in elevation by the time he is 3.25 miles horizontally away from the top of the mountain. Find the slope of his descent to the nearest hundredth.

2007-12-26 11:40:20 · 4 answers · asked by justagirl 2 in Geography