Science & Mathematics - 16 December 2007

2007-12-16 04:43:40 · 14 answers · asked by Anonymous in Mathematics

For a project I need to have a 8.5 X 11 inch sheet of paper equal 217,300 square feet (5 acres) how do I setup a scale?

2007-12-16 04:43:09 · 5 answers · asked by Dave K 1 in Engineering

how can you prove that 4 points on a line are collinear?

I need 3 methods

2007-12-16 04:42:36 · 2 answers · asked by xoxox 2 in Mathematics

2007-12-16 04:35:57 · 6 answers · asked by midnight 1 in Geography

2007-12-16 04:35:48 · 4 answers · asked by ♥ 2 in Astronomy & Space

i saw this bumpersticker and find it great. any answers ?

2007-12-16 04:34:42 · 8 answers · asked by dawn666annapolis 6 in Earth Sciences & Geology

I need to know the steps involved in doing this problem please. This is what i have, tell me if its right and what comes next.
77=10log(sub 10) (s/10^-12)
7.7=log(sub10) (s/10^-12)
10^7.7=S/10^-12
10^7.7 * 10^-12=S


I know the answer is 5.01 * 10^-5 but i dont know how to get there.

Thanks!!!

2007-12-16 04:24:56 · 2 answers · asked by Anonymous in Mathematics

If vertical wind turbines could be made thin enough and effecient enough, they could be placed on house rooftops and be very discrete (maybe only about 12 inch tall and 12 feet diameter). A top plate could conceal the spinnig blades. The contest could require that the turbines have a max area, max height, and must work for a certain amount of time (months?). On the start date, entrants would build their turbines on a specific site. The organisation(s) sponsoring the contest would get the rights to the generated electricity. The group with the most effecient turbine after the time frame would win the prize money. Entrants would also pay to enter. I think this would be a great opportunity for many engineering universities and for the organisation(s) sponsoring it. It could also lead to MANY new "rooftop" turbine concepts that could help power individual homes, without having the large "windmill tower". Maybe a similar concept could be used for the most effecient solar panel?

2007-12-16 04:19:06 · 2 answers · asked by Bman 1 in Engineering

2007-12-16 04:14:04 · 2 answers · asked by plccpa1966 2 in Chemistry

30(10-5)-4(12-5)
_______________

10 I2-6I -2(5+2)

the I I means absoute value.

2007-12-16 04:12:42 · 3 answers · asked by Anonymous in Mathematics

2007-12-16 04:11:11 · 4 answers · asked by duncan w 1 in Other - Science

2007-12-16 04:09:43 · 1 answers · asked by Anonymous in Earth Sciences & Geology

random i know, but i need to know what makes a platypus cell different from a normal animal cell

2007-12-16 04:08:35 · 2 answers · asked by Dylan A 2 in Zoology

[7(6-9)-2]-[4-(7-3)]

2007-12-16 04:08:17 · 4 answers · asked by Anonymous in Mathematics

Can you help me with these problems below? There are inequalities. please only answer if you know what u are talking about. this is due tomorrow. Thanks! (sorry the negative/subtract signs are so small) There are 3 problems. THANK-YOU!!!!!!

-5(q+12)<3q-4

7(g+8)<3(g+2)+4g

-5x+3<3x+19

2007-12-16 04:07:57 · 2 answers · asked by funkymonkey6248 2 in Mathematics

how do i evaluate 905^2 - 95^2 using suitable algebraic rules?
what about 38*62+38^2 and 69*45+45*31

2007-12-16 04:07:21 · 4 answers · asked by korean_freak_ruii 3 in Mathematics

Below. The collision dissipates 50% of the energy as heat. How high does the ball bounce?Answer in meters.

2007-12-16 04:03:31 · 2 answers · asked by mira s 1 in Physics

assuming the least upper bound property, how can we prove the nested intervals property?

2007-12-16 03:57:14 · 1 answers · asked by Ben F 1 in Mathematics

2007-12-16 03:56:21 · 36 answers · asked by Anonymous in Weather

I want to know if theres an unknown planet cause I love to learn about new things in space. Thank you! And nothing else but answers.

2007-12-16 03:55:55 · 13 answers · asked by ahlam.mussa 1 in Astronomy & Space

did you know that part of the problem with global warming is cows! it's the fact that they fart a lot

2007-12-16 03:54:00 · 9 answers · asked by Clumsical 6 in Biology

i am doing a project on the appalachians..which is located in canada ans US..
but i am doing the canadian 1..i need 2 knw som good details abt the appalachians..
plz ..can i hav any reference websites..2 thanks...

2007-12-16 03:53:55 · 3 answers · asked by lovehurts 1 in Earth Sciences & Geology

science said that all planet are spinning around the suns but the islam said not. i think islam is true. how bout your opinion?

2007-12-16 03:49:12 · 12 answers · asked by Mohd Y 1 in Astronomy & Space

2007-12-16 03:48:15 · 8 answers · asked by Anonymous in Mathematics

Did he and Buzz Aldrin reach it, or was it all faked in a studio like some people say?

2007-12-16 03:45:48 · 17 answers · asked by Anonymous in Astronomy & Space

i want to be a biologist when i get older but dont know what kind can u give me some different kinds of biologists there are out in the world (i want something to do with medical stuff or medicine)

2007-12-16 03:44:08 · 4 answers · asked by yo 2 in Biology

In miles per hour... How fast is 300km? What is the scale used to determine it?

2007-12-16 03:44:00 · 5 answers · asked by null 4 in Mathematics

2007-12-16 03:43:29 · 9 answers · asked by Aseem B 1 in Geography

I asked how, if matter is neither created nor destroyed, then where did the point the universe expanded from originate, and I got this response:

"*blinks* Honey, how could you go to school and not understand that the law is "ENERGY can be neither created nor destroyed". MATTER is created and destroyed all the time."

Does that make sense at all? As far as I could recall, there was a Law of Conservation of Matter that says that matter is only transformed; never created nor destroyed.

She later sends me this after I gave her an e-mail:

"I never said that matter can't be destroyed idiot. YOU DID. ENERGY cannot be destroyed. Matter turns into energy when IT is destroyed. Because thats what happens to matter, hon. It degrades and is turned into energy and used to fuel OTHER LIFE.

The idiotic thing you just came up with is simply the same as with energy. Since matter is MADE UP OF energy, think about it."

Am I missing something?

2007-12-16 03:39:05 · 10 answers · asked by Stardust 6 in Physics

I plan on wiring together eight 12V 35Ah Helios Sealed Lead Acid golf cart batteries (model FB 12-35) in series and parallel to give me a 24V battery bank. The bank will be used with a 24V inverter to give me 110VAC and will be used for backups as well as small loads like a wireless router. It will be charged with a solar panel.

If I setup the batteries in my basement, would I need to ventilate them? I've read that sealed lead acid batteries do not vent any gas but I want to be sure about it.

Here is a page showing the type of battery I purchased:
http://www.batteries.com/productprofile.asp?appid=265102

Does anyone here know if this battery has liquid inside, or uses AGM?

2007-12-16 03:35:19 · 4 answers · asked by Anonymous in Engineering