Science & Mathematics - 16 December 2007

why don't we utilize more Geothermal power?
I know most of that is available on the west coast.
But isn't it cheaper and more constant than solar or wind?
solar you have to have expensive equipment.

where Geothermal is available, you dig a deep hole. dump in water. and have a release hole. that the steam spins a turbine.
I also read that there is enough Geothermal power on the west coast to provide 2000 times the power currently consumed by the whole US.

So why arn't people talking and using it more?

2007-12-16 12:40:02 · 2 answers · asked by Philip Augustus 3 in Earth Sciences & Geology

Can you show me the steps to solve the equation. Thanks

2007-12-16 12:37:07 · 4 answers · asked by Anonymous in Mathematics

A business wants to estimate the true mean annual income of its customers. It randomly samples 200 of its customers. The mean annual income was $52,500 with a standard deviation of $1,800. Find a 95% confidence interval for the true mean annual income of the business’ customers

A business wants to estimate the true mean annual income of its customers. The business needs to be within $100 of the true mean. The business estimates the true population standard deviation is around $2,100. If the confidence level is 95%, find the required sample size in order to meet the desired accuracy

2007-12-16 12:32:33 · 1 answers · asked by firemama 2 in Mathematics

I can't walk long distances. I have arthritis in my spine and knees. Thankyou

2007-12-16 12:32:18 · 1 answers · asked by Kaye B 6 in Medicine

Calculate the period of a ball tied to a string of length 0.8 m making 3 revolutions every second.
Answer in units of s.

Calculate the speed of the ball
answer in units of m/s

2007-12-16 12:31:54 · 2 answers · asked by Anonymous in Physics

The choices are:

Interatomic- space between atoms is growing
Interplanetary-space between planets is growing
Interstellar-space between stars is growing
Intergalactic-space between glaxies is growing

2007-12-16 12:28:01 · 3 answers · asked by Anonymous in Astronomy & Space

I tried applying the mean value theorem (& rolle's th'm) as well as the intermediate value th'm but it isn't making sense. There are no solutions, but I have a sense that one of the above methods should be used to solve this question (I may be wrong). Please help!

2007-12-16 12:26:47 · 2 answers · asked by wnap2003 2 in Mathematics

Can someone explain or show me how to figure out this question?

Nancy conjectures that the last digit of the fourth power of an even number is 6.
a) find 2 examples to support the conjecture
b) find a counter -example.

...??

2007-12-16 12:26:01 · 4 answers · asked by NIMsTastic 3 in Mathematics

I need help proving if this is true or false:
----------------
For each ε>0, there exists positive integers m and n such that:

0 < n^(1/2) - m^(1/2) - π < ε
----------------

I've messed around with it and I think it's true, but I'm stuck on how to prove it.

2007-12-16 12:25:54 · 2 answers · asked by greeneggs4spam 3 in Mathematics

the harmonic mean of 2 numbers, a and b is 2/ 1/a+1/b

The harmonice mean of 3 numbers a,b, and c is
3/ 1/a + 1/b + 1/c

a) simplifyt the expressions for 2 and 3 numbers and find a simplified expression for the harmonic mean of 4 numbers.

b) find the harmonice mean of the numbers 2,3,4,7,9

2007-12-16 12:24:55 · 1 answers · asked by john c 1 in Mathematics

y = -1/3x +2

2007-12-16 12:24:42 · 2 answers · asked by Anonymous in Mathematics

2007-12-16 12:24:21 · 1 answers · asked by davehale82 1 in Medicine

How do you do this problem? Could you please help me out?

http://img84.imageshack.us/img84/411/61849804vo8.jpg

2007-12-16 12:24:18 · 1 answers · asked by Anonymous in Physics

if you have ever seen the hornets nest spook light tell me please!!!!!!!!!!!!!!!and if you have what was it like? did you get a strange feling? what was your first reaction? and di it just appear or did it seem as though it was a car in the lane going the opposite direction of you on an open road and it got clearer and clearer the closer it got?????

2007-12-16 12:24:10 · 4 answers · asked by Anonymous in Paranormal Phenomena

2007-12-16 12:23:27 · 8 answers · asked by *click* 3 in Chemistry

How do you identify a raccoon?
What does it eat?
More fun facts?

2007-12-16 12:23:13 · 2 answers · asked by Anonymous in Zoology

2007-12-16 12:21:55 · 2 answers · asked by Anonymous in Mathematics

science

2007-12-16 12:20:13 · 3 answers · asked by Janiece N 1 in Astronomy & Space

relative...absolute.
What's the difference?

2007-12-16 12:17:00 · 3 answers · asked by Anonymous in Astronomy & Space

2007-12-16 12:15:22 · 3 answers · asked by Kristi R 1 in Other - Science

ok so here they are :



7.the worlds smallest cell
b_ _ _e_ _ _


6. a group of simmilar cells
_ _ s_ _ _


17. [hardest] describes an organisim that exists as a group of cells

_u_ _i_ _ e_ l_ _ a_

16. scientific discription of all liveing things in terms of cells

_ _ _ _ _ h _ o _ _


21. a large vesicle that stores enzymes or liqids

_ _ c _ o _ _


27. a structure preforming spefic function within a cell

_ _ _ _ _ _ _ _ _









thanks a TON i love you!!

2007-12-16 12:12:37 · 4 answers · asked by Anonymous in Biology

2007-12-16 12:12:02 · 4 answers · asked by C H 1 in Medicine

Is aspartame a monosaccharide, disaccharide, or polysaccharide?

Same goes for saccharine and sucralose.

2007-12-16 12:11:06 · 3 answers · asked by rosie 2 in Chemistry

i need 3. thanks =)

2007-12-16 12:09:30 · 1 answers · asked by Anonymous in Earth Sciences & Geology

2007-12-16 12:07:02 · 4 answers · asked by Bob M 1 in Biology

2007-12-16 12:06:19 · 4 answers · asked by snoop d 2 in Chemistry

2007-12-16 12:04:55 · 2 answers · asked by Anonymous in Physics

Non-Newtonian Fluid?
THANKS GUYS.

2007-12-16 11:59:48 · 1 answers · asked by Anonymous in Physics

2007-12-16 11:59:02 · 10 answers · asked by Anonymous in Astronomy & Space

2007-12-16 11:56:37 · 5 answers · asked by Anonymous in Astronomy & Space