Science & Mathematics - 11 September 2007

why is this important?

2007-09-11 13:11:28 · 1 answers · asked by EGGO 2 in Botany

4<-x+2<8

I think the answer is
-2>x>-6
is this correct?

2007-09-11 13:11:07 · 2 answers · asked by Kiwi 1 in Mathematics

This may be kind of hard since you can't see the graph. But the question asks me "Use the graph of the function to find the function value of f(0)"

Then it shows a graph with the points (-5,5), (0,-2), and (5,1). The point at (-5,5) is included and the point at (5,1) is not.

My choices are
a. 12
b. 5
c. -2
d. None of the above.

Anyone know about this stuff???

2007-09-11 13:08:31 · 3 answers · asked by Anonymous in Mathematics

Is the formula: C4+H10 correct for Butane? and if so what does H10 stand for? like what chemical?

If thats not right what is the chemical formula for Butane and what do its elements stand for?

2007-09-11 13:08:30 · 4 answers · asked by diamond 4 in Chemistry

what gallaxies are beyond that expanding into? if the theories are true, space is infinate they say. we are talking about something real so how can they be sure what that means. that is where my understanding ends. please tell how can space be infinite? nothing but the math term pi is infinite. purely concocted arbitary and based on a theoretical math term like avagodro's number. i just don't know.

2007-09-11 13:07:44 · 4 answers · asked by JIM 4 in Astronomy & Space

1. the temperature at 5:00 A.M. is -38 degrees F. The temperature rises 20 degrees by 11:00 A.M. What is the tempersture at 11:00 A.M.?

2. A football team has possession of the ball on their own 15-yd line. The next two players result in he loss of a 7 yd and a gain of a 3 yd, respectively. On what yard line is the ball after the two plays?

3. Suppose your opening checking account balance is $124.53. After you write a check for $57.49 and make a deposit of $103.49, what is your new balance?

4. During an emergency excercise, a submarine dives 37 ft, rises 16 ft, and then dives 18 ft. What is the next change in the submarine's position after the second dive?

thats all. THANKS!! remember 10 points for you!

2007-09-11 13:07:08 · 19 answers · asked by Anonymous in Mathematics

Okay, so I understand absolute value.
And I understand solving inequalities.
But I don't understand how to solve absolute value inequalites when one side is a negative...for example....

[3-x] > -5

^^the parentheses are the absolute value signs.
pleasee help me!

2007-09-11 13:04:55 · 7 answers · asked by Anonymous in Mathematics

what is the oxidation number of the metal ion in
1. MnF3

2. Hg2Cl2

please explain

2007-09-11 13:04:24 · 1 answers · asked by PiNk-PrInCeSs 3 in Chemistry

Is an AMINO GROUP of an organic compound polar & water soluble? What about for a sulfhydryl group of an organic compound?

2007-09-11 13:02:46 · 1 answers · asked by iamsuperpeace 2 in Biology

the product of the ages of a set of quadruplets is 16 times the sum of their ages. how old are they?

explain this please

2007-09-11 12:59:00 · 20 answers · asked by Tyler J 1 in Mathematics

2007-09-11 12:58:40 · 9 answers · asked by Amber C 1 in Mathematics

if m

2007-09-11 12:57:16 · 3 answers · asked by basketball boi 2 in Mathematics

the product of two numbers is 442.the sum of the two numbers is 43.find the two numbers

2007-09-11 12:47:31 · 4 answers · asked by Anonymous in Mathematics

2007-09-11 12:46:42 · 12 answers · asked by Amber C 1 in Mathematics

Mass is a measure of inertia, right? A car traveling at a high speed has a lot of inertia. Does this mean that the faster the car goes, the greater the inertia and the greater the mass?

2007-09-11 12:45:40 · 2 answers · asked by Anonymous in Physics

need help with homework = ]

2007-09-11 12:45:03 · 4 answers · asked by jeffery s 2 in Earth Sciences & Geology

2007-09-11 12:45:00 · 1 answers · asked by Anonymous in Mathematics

how about microsecond... and nano second...if someone is able to help me in physics please give me your email.
your help is appreciated.

2007-09-11 12:41:40 · 3 answers · asked by shamsan_415 1 in Physics

Do you know where to find the answer to this question?
Does sound travel faster in water or in air?
What is the answer too?

2007-09-11 12:38:08 · 3 answers · asked by Anonymous in Earth Sciences & Geology

How do you find this...
"When you multiply 2178 by 4, the product is 8712.
Notice that the digits in the product are the reverse of the digits in 2178. Find the four digit number whose digits are reversed when multiplied by nine."

2007-09-11 12:36:24 · 14 answers · asked by Anonymous in Mathematics

what do vinegar and cola have in common as acids?

2007-09-11 12:35:10 · 1 answers · asked by Anonymous in Chemistry

I have geometry this year and i was just wondering what it means bcuz my teacher uses it alot...

2007-09-11 12:33:52 · 13 answers · asked by deinaaa917 3 in Mathematics

In a string of 12 christmas lights, 3 are defective. Bulbs are selected at random, one at a time, until the third defective bulb is found. Compute the probability that the third defective bulb is the

A)Third bulb tested
B)Fifth bulb tested
C)Tenth bulb tested

Please explain your answers.

Thanks...

2007-09-11 12:31:40 · 3 answers · asked by linzaroo06 1 in Mathematics

has anybody ever heard of mt. polamer? it's some sort of giant telescope site or something. I can't find it on google, wikipedia, or ask. it's like it doesn't exist. but i kno it does. am i spelling it wrong?

2007-09-11 12:31:08 · 5 answers · asked by Moi 2 in Astronomy & Space

2007-09-11 12:29:03 · 9 answers · asked by Amber C 1 in Mathematics

Hi All
Below is an article I found on Yahoo. (scroll below what I wrote if the link doen't work: http://green.yahoo.com/index.php?q=node/1570 )
It's a facinating concept I think. I have little doubt this process will be exploited at some time in the future. One thing bothers me: Once the water is burned, what will the exhaust product be? Will the water naturally reform just as fast as it was consumed? I know there is a LOT of water in the world, but if the water burned as fuel cannot be reclaimed, it's just a matter of time til things dry up permanently.
This process could sell like hotcakes. The "oil burden" would be over. Possibly the dirty exhaust would be over too. This is good. In order for this to be a harmless solution, though, there needs to be a complete cycle: salt water--> energy + exhaust --> saltwater again.
Another consideration is: Can the neccisary radio frequency be produced with enough power in close proximity to life without screwing up that life (us included!) I work with radio frequency generators and there are warnings all over not to turn on power without the proper precautions. Some radio can scramble or cook your brain. So what frequency is this guy using?
Sorry if I sound like an environmental "wacko". I just love my world, and don't want to see it a dead moon in 10,000 years.

I hope this guy does come up with something good.

Any thoughts?

J



Radio Frequencies Help Burn Salt Water
By David Templeton, Pittsburgh Post-Gazette
Tue, 11 Sep 2007, 11:41AM
Email this Page IM this Story Bookmark this Story Add to your Del.icio.us account Digg this Story
ERIE, Pa. - An Erie cancer researcher has found a way to burn salt water, a novel invention that is being touted by one chemist as the "most remarkable" water science discovery in a century.
John Kanzius happened upon the discovery accidentally when he tried to desalinate seawater with a radio-frequency generator he developed to treat cancer. He discovered that as long as the salt water was exposed to the radio frequencies, it would burn.
The discovery has scientists excited by the prospect of using salt water, the most abundant resource on earth, as a fuel.
Rustum Roy, a Penn State University chemist, has held demonstrations at his State College lab to confirm his own observations.
The radio frequencies act to weaken the bonds between the elements that make up salt water, releasing the hydrogen, Roy said. Once ignited, the hydrogen will burn as long as it is exposed to the frequencies, he said.
The discovery is "the most remarkable in water science in 100 years," Roy said.
"This is the most abundant element in the world. It is everywhere," Roy said. "Seeing it burn gives me the chills."
Roy will meet this week with officials from the Department of Energy and the Department of Defense to try to obtain research funding.
The scientists want to find out whether the energy output from the burning hydrogen — which reached a heat of more than 3,000 degrees Fahrenheit — would be enough to power a car or other heavy machinery.
"We will get our ideas together and check this out and see where it leads," Roy said. "The potential is huge."
___
Information from: Pittsburgh Post-Gazette



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2007-09-11 12:27:49 · 7 answers · asked by Anonymous in Chemistry

can some one explain the a VERY Simple step by step to figure out what my load calculation is, or can some one show me a really good web site i can go to that will explain everything to me. I am very bad at math so im going to need some help please ?

2007-09-11 12:27:21 · 2 answers · asked by EJ M 1 in Engineering

In rectangle ABCD, diagonal AC measures 11 cm and side AB measures 7cm. Find to the nearest degree the measure of angle CAB.

please show me how to do this

2007-09-11 12:26:48 · 1 answers · asked by Anonymous in Mathematics

1). after traveling 387 miles from Los Angeles to San Fransisco, Rich noted that his odometer read exactly 27972. This number reads the same backwards as forwards. What is the next such number and how far will he have to drive for it to appear on the odometer?


2). Latitudes are measured north and south. How many degrees south of NYC is Nairobi? NYC- lat.- 41 degrees north long.- 74 degrees west
Nairobi- lat- 1 degree south and long- 37 degrees east.

thankyou ^_^
i need a legend and an equation please!

2007-09-11 12:25:20 · 4 answers · asked by cx 2 in Mathematics

tell me a scary story you made up (i mean a long and extremely p1ss yourself scary) not that time you saw that ghpst in the hallway or when you watched the excorsist and had bad dreams i mean a long extremely scary story

peace \/

2007-09-11 12:22:17 · 8 answers · asked by Anonymous in Paranormal Phenomena