Science & Mathematics - 21 September 2007

Gas or liquid?
Or both?

2007-09-21 11:50:37 · 5 answers · asked by Anonymous in Chemistry

I know there are some odd medium sized mammals like llamas and tapirs and some kind of huge rodent but I can't remember ever hearing of any large (mammal) predators or grazing animals. Why no bison on the Pampas? No hippos in the Amazon? I can't think of anything bigger than a llama! Is this really the case or am I just an ignorant norte americano?

2007-09-21 11:50:17 · 6 answers · asked by mmoconnor 2 in Zoology

For the vectors a = (3.0 m) + (3.8 m), and b = (4.0 m) - (2.8 m), give the x and y components, magnitudes, and directions of the following vector operations.

(a) a + b

(b) b - a


**please give the x and y components, magnitudes, and directions of each

2007-09-21 11:48:09 · 2 answers · asked by sugardaddy8815 1 in Physics

(7z-3x+3*(3y^2))
-------------------------
(5z+12+(7x^1/2)y)

2007-09-21 11:46:04 · 2 answers · asked by C.L. ~Raptors~ 4 in Mathematics

Am i simplifying this equation correctly?
d= vt + 1/2gt^2 for v = 0 m/s

g= 2d/t^2

can this formula then be used to calculate g?

2007-09-21 11:44:12 · 2 answers · asked by darling_15_15 1 in Physics

I really don't know how to do this.....

A quartic function passes throught he points (-2, 45), (-1, 48), (0, 45), (1, 48), and (2,45). Determine the equation of the function that passes through these points.

10 points to the first person who can give me the answer.

2007-09-21 11:41:43 · 4 answers · asked by tmlfan 4 in Mathematics

I have no idea what the answer to this would be. Inertia is restistence to change in motion, but I don't understand how my small car made out of index cards and film caps for wheels would exhibit this.

2007-09-21 11:38:23 · 2 answers · asked by Anonymous in Physics

An american engineer undertakes a project in Europe to design and construct bridge pilings exactly as were done ikn the United States. Each piling required 20.0 cubic yards of concrete in the USA. If 42 pilings will be needed for the project, how many cubic meters of concrete will be required?



I'm stuck on this question. Can anyone help me please???
Thank you sooo much:)

2007-09-21 11:34:38 · 7 answers · asked by Natlsn12009 1 in Mathematics

2007-09-21 11:33:08 · 3 answers · asked by Anonymous in Physics

Anything like a blood test or any other biological test to tell?

My mother is Hungarian, but my father is German.
I have very African American hair/ possible South American hair. My features are nothing like my parents'.

I asked my mother if my father is my real father and she told me he is.

2007-09-21 11:32:16 · 5 answers · asked by Anonymous in Biology

Some problems. Use the 68-95-99.7 to find the percentage of each heart rate in each categorie. With the the mean of 70, and a standard deviation of 15. Thanks.

Less than 55...
Less than 40...
Less than 85...
Less than 100...
Greater than 85...
Greater than 55...
Greater than 40.... and
Between 55 and 85.

If you could show your work for even one problem it would help a lot.

Thank-you!

2007-09-21 11:29:50 · 6 answers · asked by Anonymous in Mathematics

2007-09-21 11:29:05 · 1 answers · asked by Anonymous in Earth Sciences & Geology

My idea: Teams of llamas on llama-fur covered treadmills.

Your ideas, please?

-------


http://www.elftown.com/wiki.html?name=Pauly%20the%20Anthro-Dragon

2007-09-21 11:28:53 · 2 answers · asked by Anonymous in Earth Sciences & Geology

simplify

2007-09-21 11:24:04 · 10 answers · asked by joseph c 1 in Mathematics

simplify

2007-09-21 11:23:18 · 7 answers · asked by joseph c 1 in Mathematics

im building a corner cupboard and thats why i need to know the answer. the traingle is a right triangle and the angle is 90 degrees. the bottom side is 11 1/4 as said before. can you use either sin or cos to find the other two sides or pythagoram therom? some working would help? if not is there any other way the 2 remaining sides can be found?

2007-09-21 11:22:39 · 8 answers · asked by Anonymous in Physics

or computation, not sure of the word, for lottery works syndicate. There are 10 of us with 1 line each = 10 lines, how can we cover our lines with min/max numbers? ie. we have 3 numbers up on one line, how do I work out that we are guaranteed 3min on other lines etc. Can someone give me the formula as to cover all these lines. realise I may not have worded this properly, but relying on maths/numbers people will understand what I mean, basically want to cover all lines in the event of 3 or more numbers coming up. many thanks in advance.

2007-09-21 11:17:52 · 8 answers · asked by Anonymous in Mathematics

http://en.wikipedia.org/wiki/Image:CarnotCycle1.png

Amount of heat supplied to the body in A->B phase of the cycle is 373.16J
What amount of heat is removed from the body in C->D phase, if Tc is temperature of triple point of water?

2007-09-21 11:10:30 · 2 answers · asked by Alexander 6 in Physics

2007-09-21 11:09:25 · 5 answers · asked by Anonymous in Geography

please dont say hair dye, death or idk

2007-09-21 11:08:04 · 4 answers · asked by Anonymous in Biology

what propulsion,weopondry,life support,communication,crew#
do you think a 2100 space craft would have and how far could it go?

This is for a science fiction book so it doesnt have to be
perfect.just guess

2007-09-21 11:07:46 · 5 answers · asked by evlangelo 2 in Astronomy & Space

If you had 1 speaker (for e.g.) playing music at a certain volume level, what would happen of you had a 1000 speakers all playing at the same volume level...would the volume level stay the same or be increased? Does it depend on the size of the room that the speakers are in...if this is confusing...then compare to 1 person talking to 1000 talking...the sound is louder but is that because everyone is speaking louder to be heard? Would the volume level increse by the amount of speakers (e.g. x1000 if there are a 1000 more speakers) OR is there a mathematical equation to work it out?

2007-09-21 11:06:56 · 10 answers · asked by jenfleur 1 in Physics

If you can, please include a source. THNX!

2007-09-21 11:06:46 · 3 answers · asked by lalala 3 in Chemistry

accurately displays continental shelves and underwater mountains and such. doesnt have to be all one picture. I don't mind if it is a couple of pictures

2007-09-21 11:04:04 · 3 answers · asked by al8067 1 in Geography

A mixture known to contain AlBr3 and CaBr2 was analyzed by reaction with AgNo3 to precipitate all of the bromide ion as AgBr. If a 2.0143 g sample of the mixture yields 4.0034 g of AgBr, what is the weight percent of AlBr3 in the mixture?

2007-09-21 11:01:23 · 2 answers · asked by Kristin H 1 in Chemistry

is that awesome???

But what does it mean?????????

2007-09-21 11:01:11 · 10 answers · asked by Fsf S 1 in Mathematics

does summer end today 9/21 or another day.

2007-09-21 10:58:50 · 11 answers · asked by Jenna 3 in Weather

What is the chemical formula of the salt produced by neutralization of hydrobromic acid with Mg(OH)2?

and

What is the chemical formula of the salt produced by neutralization of sodium hydroxide with sulfuric acid?

2007-09-21 10:56:53 · 2 answers · asked by PiNk-PrInCeSs 3 in Chemistry

2007-09-21 10:53:04 · 9 answers · asked by Anonymous in Other - Science

how do you know that 77 is not a square number? same question different wording

2007-09-21 10:51:51 · 5 answers · asked by Anonymous in Mathematics