Science & Mathematics - 14 November 2007

Please Tell me the answers to these 8 problems !!
Ok , the directions are : Write the fractions as a percent .
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1.) 2 over 5
2.) 12 over 60
3.)13 over 50
4.) 8 over 16
5.) 31 over 50
6.) 8 over 40
7.) 21 over 75
8.) 180 over 200
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Please answer them correctly
Thank you.

2007-11-14 15:01:09 · 9 answers · asked by sarahxxnerd 1 in Mathematics

Compare and contrast a perpendicular bisector and a median of a triangle.

Will award a best answer.

2007-11-14 15:01:06 · 1 answers · asked by Rick 2 in Mathematics

-2 over -2 to the -3 power minus 3rd power, over-3 to the -2nd power

2007-11-14 15:00:22 · 2 answers · asked by ? 2 in Mathematics

Is there any formula in the world that related amplitude and frequency? Google and everything just completely failed me.

"Theoretically, if the amplitude of a mass-and-spring system is increased by a factor of 3, then the frequency will increase by a factor of:" Yet I have no idea how to figure it out.

2007-11-14 14:58:51 · 2 answers · asked by phrozenwarrior 3 in Physics

2007-11-14 14:57:57 · 1 answers · asked by Anonymous in Chemistry

QUESTION: What is the average speed, in km / hr for a car that travels 22 km in 15 minutes.

Ok, this is pretty simple I think... I just converted 15 minutes to .25 hour and did 22 km / .25 hour and got 88 km / hr

Is this done correctly? x____x

2007-11-14 14:56:39 · 4 answers · asked by Anonymous in Mathematics

a gaseous element is a poor conductor of heat and electricity, and is extremely nonreactive. Is the element likely to be a metal, nonmetal, or metalloid?
where would the element be located on the periodic table?
Explain please!!

2007-11-14 14:55:34 · 3 answers · asked by Anonymous in Chemistry

2007-11-14 14:55:01 · 5 answers · asked by sojo3 1 in Chemistry

hint: what types of tissues does it contain.

i dont actually know this answer. i havnt learend about hands yet? please help me thank-you.

2007-11-14 14:53:16 · 3 answers · asked by TheDarkness 1 in Biology

2007-11-14 14:52:50 · 20 answers · asked by James L 2 in Astronomy & Space

2007-11-14 14:52:16 · 2 answers · asked by Help 1 in Chemistry

I need help with my study on waves.

Can somebody give me some examples of energy transfers by waves and their sources? Preferably like 5 or so because I am kind of a slow student and the more I can try to understand the better.

2007-11-14 14:51:07 · 1 answers · asked by Detroit Needs Help 2 in Physics

Hvap for the liquid is 40.2 kJ mol-1 at 89°C.

2007-11-14 14:50:18 · 1 answers · asked by Sean D 2 in Chemistry

What will be the ratios of genotypes and phenotypes of the F1 gen. resulting from the following cross: axial-red (true breeding) X terminal white?

I'm not asking for the answer, but what does it mean they they describe the flowers as axial and terminal.

2007-11-14 14:49:55 · 4 answers · asked by shadow82795 1 in Biology

Solve for y
2x+9y= negative 36

for some reason I keep goofying up!

2007-11-14 14:49:10 · 8 answers · asked by Zeppelin333 5 in Mathematics

2007-11-14 14:48:11 · 2 answers · asked by tati 2 in Zoology

Cl(g) + O(3)(g) --> ClO(g) + O(2)(g) plays a role in ozone destruction. What is the source of the monatomic chlorine, Cl, in this reaction?

******the NUMBERS in PARANTHESES are supposed to be subscripts. THANKS.

& if you want to be a BIGGER HELP. & get a better chance for BEST ANSWER.....(: please answer this one too, if you have time....


If lye, NaOH, is put in water, the solution gets hot. What kind of energy process is this?

>>>>>>>>

another question: (you don't have to answer if you're bothered by my questions)

- Write a balanced equation for the decomposition of copper (II) oxide.



SORRY FOR MY STUPIDITY.

2007-11-14 14:45:52 · 2 answers · asked by maingedang 5 in Chemistry

I have a biology test on Friday, and I need to finish my review, but I don't understand most of it! If anyone could, could someone answer at least one of these questions:
What are two jobs of water's hydrogen ions?
How is oxygen involved in light reactions?
What are excited electrons passed down?
What type of transport is used to pump Hydrogen ions?
How does the hydrogen pump get energy?
Where does the energy come from to make ATP in the light reactions?
What happens when light strikes photosystem I?
What are the products of the dark reactions?
Where do the products of the Calvin cycle go?

It would be REALLY helpful if someone could answer some, one, or maybe all. Thanks!

2007-11-14 14:45:18 · 1 answers · asked by Kazumi H 1 in Biology

A it is one of the most dangerous parts of thunnderstorms.
B it is an electric discharge between two similarly charged surfaces.
C it is caused by rapid expansion of air along and electric strike.
D it always begins in a cloud and strikes earth

2007-11-14 14:42:06 · 3 answers · asked by Anonymous in Weather

Solve: 0.4(x-3)=0.04(3x + 40)

2007-11-14 14:39:16 · 7 answers · asked by ? 2 in Mathematics

Can anybody give me some kind of list with the word form of the metals?

2007-11-14 14:38:43 · 7 answers · asked by EEEEEBIL P 1 in Earth Sciences & Geology

A clear and sunny
B hurricane
C light rain
D thunderstorms

2007-11-14 14:37:49 · 5 answers · asked by Anonymous in Weather

solve-(solving equations by factoring)

y^4-10y+9=0

2007-11-14 14:36:59 · 7 answers · asked by KBBALL20 4 in Mathematics

an 8.5 x 11 inch sheet of paper is cut in half lengthwise, while an identical sheet of paper is torn in half widthwise. do the resulting half sheets have the same area, perimeter, or both?

2007-11-14 14:34:48 · 8 answers · asked by Anonymous in Mathematics

I found a challenge problem and I cannot solve it so help.
3,437,312 ÷ 128

2007-11-14 14:34:18 · 10 answers · asked by Anonymous in Mathematics

2007-11-14 14:33:53 · 3 answers · asked by Yaman 1 in Chemistry

THANKS!!!!!!!!!!!!!!!!!!!!!!!!!!11

2007-11-14 14:32:24 · 4 answers · asked by razorbacks.fan 1 in Mathematics

2007-11-14 14:31:49 · 13 answers · asked by Anonymous in Mathematics

From time to time I mark out an area to work in by pacing the perimeter. Some of the tables I use require I know the square hectars. I'm a solid acers guy. How can I quickly estimate the hectar area?

2007-11-14 14:31:36 · 7 answers · asked by Anonymous in Engineering

i cant find it anyway on the internet plz help

2007-11-14 14:29:20 · 2 answers · asked by Anonymous in Engineering