Science & Mathematics - 5 December 2007

Can someone tell me what "Stigma Croci" is and what it is used for ?

2007-12-05 10:46:26 · 1 answers · asked by Agron M 2 in Botany

(13)/(x^2)+1=(6)/(x)
Solve for x, express in simplest a+bi form.
i knw how to solve for x (well i thought i did ) but i dont get where the i is coming from cuz there is no negative square root. Please help

2007-12-05 10:45:25 · 1 answers · asked by help 1 in Mathematics

2007-12-05 10:44:55 · 3 answers · asked by Anonymous in Physics

What is 1E15 kg * m^2/s^2 = m * (3E8 m/s)^2 ?

2007-12-05 10:44:42 · 3 answers · asked by Anonymous in Physics

http://img452.imageshack.us/img452/8890/vic13p065nx7.png
http://img360.imageshack.us/img360/7627/vqc13p065dz4.png

HOW DO U DO THIS I CANT GET TEH ANSWER PLZZ HELP!

2007-12-05 10:40:50 · 1 answers · asked by achabacha 1 in Physics

2007-12-05 10:39:57 · 7 answers · asked by Anonymous in Zoology

Your teacher tosses a basketball and goes through(lucky shot).

Initial velocity is 18 m/s, the angle is 62 degrees. The hoop is 3.048 m tall and the guy is 2.256 m tall. I already found my max height by using the formula and the max height is 1.62 sec.

I need to know how long it takes to reach the hoop and horizontal length and I'm stuck right now.

Thanks to all who help.

2007-12-05 10:39:00 · 3 answers · asked by Anonymous in Physics

then used to heat the house on cloudy days. Suppose that 2.4×10^8 J of heat are needed to maintain the inside of the house at 21°C. how many barrels ( 1 BARREL= 0.16 M^3) OF WATER are needed?

2007-12-05 10:33:45 · 2 answers · asked by iqbalkhanayesha 2 in Physics

1) profit for company: P(x) = -2.9x^2 + 28.4x - 40.2
x is number of years and P(x) is profit in thousands of dollars.

(a) Find year the company saw profit.
(b) Find the year the company hahd the highest profit and what profit was.
(c) Find the year the company begins to lose money,


- I totally forgot how to do this stuff but remember a little. If someone could remind me what to do to start it off, I can help him out. THANKS!! :)

2007-12-05 10:31:38 · 3 answers · asked by Anonymous in Mathematics

It`s gale force winds here in Liverpool.....

Merry Xmas from Liverpool x

2007-12-05 10:30:55 · 9 answers · asked by Anonymous in Weather

why do we say that natural selection works upon the phenotype? help please...

2007-12-05 10:29:09 · 1 answers · asked by Idontwantyoutoknow 2 in Biology

Join Date: Dec 2007
Posts: 1 weird experience

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I have been trying to do mind awake and body asleep lately and have had no success until last night...

I was lying in my bed on my back. I was trying to stay in the third eye which seemed to be working. I slowly became more and more relaxed. I had my radio on quiely which may have helped my mind stay awake.

Then all of a sudden i started getting these weird feelings...Like i was distorted and i was in a very uncomftorable position like I was scrunched up into a ball or something. My neck felt one way and my legs and body all felt like they were in different positions. Anyway this feeling slowly went away and then i got another strang feeling. Like my bed was on a slant. I felt like i should have been sliding off of the bed but instead i felt so heavy lke i was apart of the bed. It was almost like a ride where i felt strapped into the bed as it tipped to the left side. At that point i wondereed if i was parilyzed yet so i moved my fingers and then slowly this feeling started to go away a bit. Then after that feeling driftedoff i got a rush of something moving through my body! It was like a rush of feel good chemicals or something. At first i felt really dizzy and and lightheaded and kinda scared but then the feeling kept intensifying to the point where i was so scared that i had to get up! The only thing i can compare it to is the feeling when your sick and you want to throw up but only a bit different and more powerful!

If anyone knows what was happening i would greatly appreciate you telling me please

2007-12-05 10:27:16 · 8 answers · asked by Anonymous in Paranormal Phenomena

Join Date: Dec 2007
Posts: 1 weird experience

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I have been trying to do mind awake and body asleep lately and have had no success until last night...

I was lying in my bed on my back. I was trying to stay in the third eye which seemed to be working. I slowly became more and more relaxed. I had my radio on quiely which may have helped my mind stay awake.

Then all of a sudden i started getting these weird feelings...Like i was distorted and i was in a very uncomftorable position like I was scrunched up into a ball or something. My neck felt one way and my legs and body all felt like they were in different positions. Anyway this feeling slowly went away and then i got another strang feeling. Like my bed was on a slant. I felt like i should have been sliding off of the bed but instead i felt so heavy lke i was apart of the bed. It was almost like a ride where i felt strapped into the bed as it tipped to the left side. At that point i wondereed if i was parilyzed yet so i moved my fingers and then slowly this feeling started to go away a bit. Then after that feeling driftedoff i got a rush of something moving through my body! It was like a rush of feel good chemicals or something. At first i felt really dizzy and and lightheaded and kinda scared but then the feeling kept intensifying to the point where i was so scared that i had to get up! The only thing i can compare it to is the feeling when your sick and you want to throw up but only a bit different and more powerful!

If anyone knows what was happening i would greatly appreciate you telling me please

2007-12-05 10:25:08 · 9 answers · asked by Anonymous in Paranormal Phenomena

Please help me asap!!!!

2007-12-05 10:22:59 · 1 answers · asked by shufalo 1 in Chemistry

I have to do a science experament for my agriculture class. I wanted to know what is the best kind of veggie to grow hydroponicly?What the set-up would be? What do i need to grow it in?

2007-12-05 10:21:13 · 9 answers · asked by Heather L 1 in Agriculture

What do you think about Pluto not being a planet anymore?What about the amount of money we spend on space travel?Space travel in general?Should we keep it?

2007-12-05 10:19:31 · 7 answers · asked by Mimi 3 in Astronomy & Space

sqrt of x times sqrt of x =?

2007-12-05 10:17:22 · 4 answers · asked by Desilicious 1 in Mathematics

pleaze people dont write stupid anwserz

2007-12-05 10:12:46 · 6 answers · asked by Oldskool Catholic 3 in Earth Sciences & Geology

The half life of plutonium-234 is 9 hours. If 50 milligrams is present now, how much will be present in 4 days? Our book has the formula, I just dont know how to rearrange the problem/numbers to work out how the book says. Please help!

2007-12-05 10:11:04 · 2 answers · asked by Anonymous in Mathematics

2007-12-05 10:10:28 · 4 answers · asked by Anonymous in Mathematics

the concept blows my mind but i dont fully understand it. can anyone make it more understandable?

2007-12-05 10:09:04 · 4 answers · asked by Anonymous in Astronomy & Space

1: Steven has 3 pounds of brand 121 nuts that sell for $2.23 a pound. He also has brand 330 nuts that sell for $1.75 a pound. If he wants a mixture of nuts that sell for $1.93 a pound, how many pounds of brand 330 should he add?






3 pounds
5 pounds
6 pounds
8 pounds


2: Brianna has 2 pounds of brand 176 nuts that sell for $3 a pound. She also has brand 391 nuts that sell for $1.74 a pound. If she wants a mixture of nuts that sell for $2.58 a pound, how many pounds of brand 391 should she add?






2 pounds
1/2 pound
1 pound
3 pounds


3: Mr. Lowe bought some three-cent stamps and some two-cent stamps. The total cost was $8.90. How many stamps of each kind did he buy if the total number was 345 stamps?






200 three-cent and 145 two-cent
175 three-cent and 170 two-cent
145 three-cent and 200 two-cent
150 three-cent and 195 two-cent


4: A bank teller has a package of five-dollar bills and a package of ten-dollar bills. The total value is $1110. How many bills of each denomination has he, if the total number of bills is 142?






80 fives and 62 tens
63 tens and 79 fives
42 tens and 100 fives
80 tens and 62 fives


5: How many pounds of coffee selling for $2.25 a pound should be added to eight pounds of coffee selling for $3.75 a pound to create a blend, which will sell for $3.45 a pound?






1 pound
2 pounds
3 pounds
4 pounds

2007-12-05 10:07:07 · 3 answers · asked by Est.1992 6 in Mathematics

its
y=1.5x+5
can i even solve for y?
please help!

2007-12-05 10:06:27 · 5 answers · asked by Anonymous in Mathematics

I have been thinking of this for quite a while and I believe that evolution is a hoax. There is no proof that we have evolved, just that we are related. Also, if we evolved rom single celled organisms, why then are they still around today? I would like to hear opinions on both sides of this topic.

2007-12-05 10:05:00 · 12 answers · asked by Anonymous in Biology

-What is the magnitude of the energy change associated with emission of one mole of photons of light with wavelength of 5.755×1014 Hz


- If it takes 2.0E-1 sec. for one wavelength of a wave to pass a stationary point, what is the frequency of the wave (Hz)


-What is wavelength of an electromagnetic wave the velocity of which is 3.0E+10 cm/sec and the frequency of which is 1.3E+17 Hz? (in cm)


-How much energy (in joules) is contained in one mole of photons (electromagnetic quanta) of frequency 9.0E+17 Hz?


PLEEEEEEEASE help
i have a test tomorrow and i need to know how to work these out
:)

2007-12-05 10:04:45 · 1 answers · asked by thiswasjustforphysics 3 in Physics

x + 2y – z = -2
3x + 4y + 4z = 5
2x + 3y + 2z = 2

2007-12-05 10:04:26 · 1 answers · asked by jared r 1 in Mathematics

I need to do a report on comparing and contrasting how weather is predicted now to how weather was predicted then. Can you help me? Thanks.

2007-12-05 10:03:04 · 3 answers · asked by Carmen 5 in Weather

2007-12-05 10:01:47 · 10 answers · asked by Anonymous in Mathematics

I need to know for a planet project you guys are the best!

2007-12-05 10:00:42 · 11 answers · asked by Anonymous in Astronomy & Space

Determine the number of ordered pairs, (p,q) so that p and q are chosen from the set {1, 3, 5, 7.........., 1999} and p>q.

Most thoroughly explained gets the 10. =)

2007-12-05 10:00:32 · 2 answers · asked by Sunrayye 5 in Mathematics