Science & Mathematics - 6 July 2007

A Coin is unique in that the outer edge is gold while the inside is silver. Assuming both sides of the coin are identical, and a line tangent to the inner circle is 23 mm from edge to edge of the coin, and excluding the edge of the coin in the calculation, what is the surface area of gold on the coin, in square millimetres? Please round up to the nearest square millimetre.

2007-07-06 15:50:21 · 5 answers · asked by Anonymous in Mathematics

2007-07-06 15:48:46 · 3 answers · asked by higs_field 2 in Physics

When comparing two molecules like Br2O3 and SO2

2007-07-06 15:26:16 · 2 answers · asked by Sean F 2 in Chemistry

2007-07-06 15:25:30 · 10 answers · asked by Anonymous in Earth Sciences & Geology

2007-07-06 15:24:57 · 5 answers · asked by michael 1 in Mathematics

pls gv the ans asap

2007-07-06 15:21:16 · 2 answers · asked by Anonymous in Chemistry

plasma is a very good consuctor of electricity, if it makes up 99.9% of the universe, dosent this make you think about what the universe really is? or how it works?, i was thinking about the theory of cosmos, they say that stars dont generate thier own evergy but get it from the center of the galaxy. could that be true? you know the whole idea of electrical rather than atomic sun. they say the sun is gathering all this electrical energy, tahts what makes it so hot and fiery, it isnt by burning hydrogen. is it true? can you explain the idea a little clearly because i dont understand it clearly.

2007-07-06 15:16:37 · 22 answers · asked by Anonymous in Astronomy & Space

I really can't understand this concept at all, but especially this problem. Can you not only show me how to do it, but explain why you do what you do - please ?

f(x) = 2x g(x) = x+7

(f of g)(2) = ?

2007-07-06 15:12:57 · 5 answers · asked by dishbaby2003 1 in Mathematics

what are the different ways of charging leyden jars

2007-07-06 15:10:24 · 3 answers · asked by macgyver 1 in Other - Science

I know lower voltage requires higher amperage so much thicker power cables that take more resources but otherwise which system is safer to work with and which is more efficient?

2007-07-06 15:03:07 · 7 answers · asked by Anonymous in Engineering

2007-07-06 15:02:43 · 10 answers · asked by Gypsy Gal 6 in Physics

For example comparing ICl to Br_2_
or...
PH_3_ to SiH_4_
Only with the help of a periodic table.

2007-07-06 14:58:59 · 2 answers · asked by Sean F 2 in Chemistry

2007-07-06 14:58:41 · 2 answers · asked by ivallrod 4 in Weather

Regarding Chixculub, Mexico. why would the large impact at
this site have killed the dinosaurs?
a. The explosion would have heated the planet to hundreds of degrees
warmer than present, killing all animal life.
b. The high amounts of radiation would be lethal for any plant or animal
life with complex DNA.
c. The soot and debris of the impact would have cooled the Earth too low
for the larger animals to survive.
d. The impact would have caused a large tidal wave that would have
killed all land animals.

2007-07-06 14:57:38 · 13 answers · asked by Kat Von D 2 in Earth Sciences & Geology

Evaluate the following and be sure to use proper units.

44 ft/sx1 mi/5,280 ft x 3,600 s/h

This is has totally stumped me I have gone over my lesson plan and I am just lost!!! Please anyone I need some guidance!

2007-07-06 14:57:04 · 3 answers · asked by teenysfashion03 3 in Mathematics

since all the rocks rotate around the sun like the ring of saturn.

2007-07-06 14:51:39 · 15 answers · asked by NOMEGA 1 in Astronomy & Space

I was wondering....
Say some people are talking quietly in a room with the door open. And there are some more people in the hallway and around a corner that can hear them. If the people in the hallway talked, would the people in the room be able to hear them as clearly as the people in the hallway heard them?

2007-07-06 14:37:31 · 5 answers · asked by Savannah 2 in Other - Science

Meade or celestron? which do you prefer

2007-07-06 14:36:21 · 5 answers · asked by comethunter 3 in Astronomy & Space

Pi is calculated by a converging asymptotic function,

But what I would like is a method to calculate PI one decimal at a time, let's say 3 then 3,1, then 3,14 then 3.145 etc.

Is there a way to calculate PI like this ?

2007-07-06 14:32:43 · 3 answers · asked by Chief Justice 1 in Mathematics

2007-07-06 14:29:54 · 7 answers · asked by adan r 1 in Mathematics

When people like drown in water, do their bodies float to the surface or sink to the bottom?

2007-07-06 14:29:41 · 7 answers · asked by music_is_life 3 in Earth Sciences & Geology

why do i always want somebody to sit close to me when im sick! why?

2007-07-06 14:29:09 · 4 answers · asked by Anonymous in Medicine

2007-07-06 14:24:51 · 4 answers · asked by Joshua Tamayo 2 in Earth Sciences & Geology

I'm getting really tired of this crap. I feel like prozac is making me like more socially stupid and I'm not always talking a lot. I always stutter too and its annoying. I have been on it since I was in 3rd grade and I am now 16.

I just want to be normal again. This drug only gets rid of my anxiety but I want to face that on my own without the bad side effects. When I didn't take my pill that night I got really emotional about something that was bothering me for a long time. And I started from 10 mg to 40 now. I just want to stop completely.

2007-07-06 14:24:38 · 6 answers · asked by Anonymous in Medicine

2007-07-06 14:22:26 · 2 answers · asked by Robert C 1 in Mathematics

Is it cause they can't or do they just choose not too?

2007-07-06 14:21:05 · 6 answers · asked by gerrardunreal 2 in Zoology

I think this is primarily a thermodynamics question but I am open to other kinds of scientifc explanation. Please do not give a global warming answer unless you can explain the mechanism or pont to the physical issues behind the locational shifts resulting in more flooding in some places and the growth of desertification in other places. I ask this Q seeking better answers than I have so I can explain the reason for the difference to others better than I can. This is a scientific Q, casual A's just don't cut it.

2007-07-06 14:16:44 · 5 answers · asked by Anonymous in Physics

i'm not going to do it, i'm just wondering

2007-07-06 14:16:33 · 9 answers · asked by beast 1 in Botany

2007-07-06 14:15:16 · 2 answers · asked by Mark Alfred Y 1 in Earth Sciences & Geology

2007-07-06 14:14:56 · 10 answers · asked by adan r 1 in Mathematics