Science & Mathematics - 23 October 2007

2007-10-23 14:11:29 · 5 answers · asked by And i heard as it were a thunder 6 in Engineering

My friend says they're not, that they are just black cougars or mountain loins what do you think??? Honest answers please, and if you could give the sight that you got it from ill put u on the best answer thingy:D

2007-10-23 14:10:05 · 9 answers · asked by Elle 2 in Zoology

where did the industrial revolution begin?

2007-10-23 14:09:42 · 10 answers · asked by Anonymous in Geography

i'm stumped and i need this for my homework which is due tomorrow.

thanks to anyone who answers

2007-10-23 14:08:53 · 8 answers · asked by Anonymous in Mathematics

I need to know how to find the distance between the two points
(60N, 110W) and (20S, 110W)? Can someone please help me

2007-10-23 14:06:14 · 2 answers · asked by Albus 2 in Geography

Prove that
n
∑ (-1)^i * nCi * (k – i)^n = n!
i=0

where i, n, k Є Z+

2007-10-23 14:04:15 · 5 answers · asked by Dr D 7 in Mathematics

I want to ace my test need trick PLEZZ help only serious awnsers please.

2007-10-23 14:03:46 · 7 answers · asked by Anonymous in Geography

water

2007-10-23 14:02:37 · 3 answers · asked by mulanyee 1 in Other - Science

How do I find the current if the voltage is 6 volts, and there is no resistance?

I know how to find the current if there IS resistance, but I don't know how if there isn't any at all.

2007-10-23 14:00:15 · 4 answers · asked by Anonymous in Physics

Every year, without fail! I'm sick of it...literally.

2007-10-23 13:59:23 · 3 answers · asked by mttprrish 2 in Medicine

in example 3, we chose vector c and let vector c = sa+tb. (a + b are vectors. Then we found that c= 2a + 3b. what result would we have obtained if we had chosen:

a) b instead of c??

(((( the coordinates from example 3 are a=[1,2,3], b=[2,.1,3] and c=[8,1,15] )))))

the answer is b= -2/3a + 1/3c.


can someone show the work i keep getting it wrong even though i follow the exmaple exactly!!

2007-10-23 13:59:20 · 1 answers · asked by mystery_girl07 2 in Mathematics

The sum of a number and 6 times it's reciprocal is -7. Find all numbers that meet this condition.

Be sure to list all the solutions.
If there are multiple solutions, separate them with commas, but do not include any spaces in your response.

2007-10-23 13:58:49 · 5 answers · asked by ry ry 3 in Mathematics

x+4y-z=10
-2x+3y-2z=7
3x+2y+z=4


I have gotten 3 different answers.. the answers work for 2 of the equations but not all three.. can someone help??

2007-10-23 13:58:44 · 3 answers · asked by Anonymous in Mathematics

what scientists do bizarre research if so which ones and what do they research?

2007-10-23 13:57:23 · 1 answers · asked by ladyc 2 in Other - Science

http://img404.imageshack.us/img404/4382/hintll2.png

click and answer

2007-10-23 13:54:25 · 5 answers · asked by Anonymous in Astronomy & Space

2007-10-23 13:53:47 · 2 answers · asked by james p 2 in Mathematics

2007-10-23 13:50:28 · 8 answers · asked by moonlightNY 1 in Earth Sciences & Geology

We have often heard the argument that privately funded research is suspect because the scientists who are employed by private firms have a profit motive, and that they are predisposed to give answers consistent with their bosses' goals. But isn't that also true of scientists who are funded by government grants? Are they not motivated by the grant money and predisposed to give answers consistent with the goals of the grantor?

Your thoughts?

(I am posting this in two categories: politics and science. I'm interested if the science community has a different general opinion from the more politically inclined.)

2007-10-23 13:50:27 · 2 answers · asked by Martin L 5 in Other - Science

So I am struggling with this question (the 4 rpm thing is throwing me off):

"A lighthouse is located on a small island 3 km away from the nearest point P on a straigh shoreline and its light makes four revolutions per minute. How fast is the beam of light moving along the shoreline when it is 1 km from P?"

So far I have drawn out the right triangle and made the angle between the beam of light and the perpindicular theta. Made the verticle line (perpindicular to the shore) 3 km, and the shore "x". I think I should be solving for dx/dt? Anyway, I've used "tangent theta = x/3" to relate everything. Made that into x = 3 tangent theta, took the derivative, and solved for dx/dt (after calculating theta). I came up with 38.317.... but I don't know the units and I'm pretty sure it is not correct. Any help would really be appreciated.

2007-10-23 13:50:12 · 1 answers · asked by RedBirdNation 2 in Mathematics

i found about 8 of them, their all about a half inch long and about a quarter inch wide. they have a cylinder shape, a closed end and an open ene( i guess they hatched). It was buried in the trunk of the tree we recently took down. I need help figuring out what it is?

2007-10-23 13:44:23 · 3 answers · asked by BRENDA G 1 in Zoology

If log2(log3a)=2, determine the value of a. (Answer:81)

Note: The 2 after the first log is a subscript as well as the 3a after the second log.

If log2n(1994) = logn(486sqr2), determine the value of n^6.
(Answer: 2.23 8 10^11)

Note: The 2n after the first log is a subscribt and the n after the second log is also a subscribt. Also note that the 2 is squarerooted.

Please show all the steps. It would really help!!

2007-10-23 13:43:35 · 1 answers · asked by Sandra 2 in Mathematics

2007-10-23 13:42:09 · 3 answers · asked by ggmal8 2 in Mathematics

Someone said that foil is an insulator, but i thought aluminum foil DO conduct electricity. I remember doing labs in elementary school with foil to turn light bulbs on.

2007-10-23 13:42:00 · 10 answers · asked by sAviOr 1 in Engineering

if you put a damp paper towel on the end of a thermometer and fan it, and take a thermometer without anything and fan that too, which would be colder, the thermometer with or with out the damp paper towel? please, answer if you only know what your talking about. please don't guess.

2007-10-23 13:40:42 · 1 answers · asked by Jason 2 in Physics

1. Prove that if G=, then G=

2007-10-23 13:40:14 · 1 answers · asked by Anonymous in Mathematics

2007-10-23 13:36:36 · 1 answers · asked by ... 2 in Other - Science

I have this equation:
2Mg+O2 (heat) > 2MgO

Is this BOTH a combination and a combustion reaction? Thanks!

2007-10-23 13:35:13 · 1 answers · asked by Tank Cat 1 in Chemistry

how many marbles does each have?

2007-10-23 13:35:12 · 8 answers · asked by Therry 2 in Mathematics

But I can't find any info on it! Of course, I don;t imagine it will only be so close for a single day, but I heard on the news that on this full moon the moon will be closer to the earth that it has been is many many...well, moons. I was curious about the possible effects this willl have on earth, and am trying to find some info, but I've searched and searched (even on nasa!) and can't find anything. Do you have any links I may find helpful?

2007-10-23 13:35:02 · 9 answers · asked by poetris 2 in Astronomy & Space

Where I live we have rent control and it's 8%.
In February my rent will go up 8% from $900.00 and I would like to know what it will be but I don't know how to figure it out.
So could you please tell me what 8% of 900 is?

2007-10-23 13:33:07 · 5 answers · asked by Adelaide B 5 in Mathematics