Science & Mathematics - 15 December 2006

Why the names of shells in the atomic discription are not starts from A,B C...?

2006-12-15 23:54:25 · 3 answers · asked by Perochak 2 in Chemistry

The Yahoo community helped greatly to select the size of the materials to build a 2nd florr for my shed. 2 X 6 beams with 3/4 inch plywood is what I will use.

Question: With 2 X 6 beams, I assume I will need 8 " nails to secure the beams to the wood frame. How many nails on each end to lay the beams?

Also, what size nails or screws to secure the flooring to the 2 X 6 beams?

2006-12-15 23:51:27 · 4 answers · asked by nathan_strahl 1 in Engineering

2006-12-15 23:42:12 · 2 answers · asked by smrtsmyl 1 in Medicine

2006-12-15 23:41:53 · 6 answers · asked by kdurwin@sbcglobal.net 1 in Geography

This needs a chemical formula in order to prepare such a strong drug called "ICE".

2006-12-15 23:37:23 · 3 answers · asked by matin 1 in Chemistry

i mean when do the males of the species acquire the ability to procreate? What is the sign (note that it is Menstruation for the females, usually at the age of 11-14)?

2006-12-15 23:31:28 · 12 answers · asked by hm. 3 in Biology

Can any one say me how to find the n factor of a salt.
0.2M KMnO4 solution completely reacts with 0.05M FeSO4 solution under acidic conditions . The volume of FeSO4 used is 50 ml. Wat? volume of KMnO4
was used?
On referring to my txt book its given
0.2*5*V=0.05*50
V=2.5 ml
So how did dis 5 get in between.

2006-12-15 23:29:07 · 1 answers · asked by Annie 1 in Chemistry

2006-12-15 23:23:20 · 1 answers · asked by swami 2 in Biology

aswer these and the best will win;
1.what is my dog's name
a.evita b.missi c.happy
2.what is my favorite element
a.fire b.ear c.water
3.what is my favorite music instrument
a.piano b.guitar c. lyra
4.what color i like most
a.black b.yellow c.blue
5.i like to say more often
a.yes b.no
good luck! ;o]

2006-12-15 23:22:34 · 5 answers · asked by kittana! 2 in Paranormal Phenomena

can you briefly explain to me the use of a resistor, transistor, transformer, capacitor, relay, multivibrator, LED, and such...

because i have this project which is the clapswitch but i have no idea how this materials able to work the clapswitch.

i've been researching but nothing is really retained in my mind esp. that i have zero-background about this things

so please just tell me simply what's up with this things

thanks in advance

2006-12-15 23:17:38 · 4 answers · asked by joan 2 in Engineering

2006-12-15 23:14:14 · 5 answers · asked by Felice Nicola 2 in Mathematics

In my gym my instructor alway insist to go for tablets which give best protien to our body and as per him it is very much needed to our body when we do regular exersise , is it ? I asked many of my friends but some well know said yes but they said to go for homely food protein mean household vegetables. Can you give me what is the best way to get best protein and from food which is the best protein which will help me out

2006-12-15 23:14:00 · 9 answers · asked by sunil n 2 in Medicine

6pm on your right hand and 6am on the left one or midday on your nose and midnight on our back?

2006-12-15 23:12:29 · 8 answers · asked by pingouin 3 in Astronomy & Space

2006-12-15 23:08:54 · 2 answers · asked by Abhimanyu m 1 in Engineering

2006-12-15 23:05:45 · 10 answers · asked by venkataraghava2006 1 in Zoology

2006-12-15 23:05:40 · 20 answers · asked by Mujhe Bhokne Do 1 in Astronomy & Space

2006-12-15 23:02:19 · 2 answers · asked by vijayusa33 1 in Astronomy & Space

2006-12-15 22:58:12 · 1 answers · asked by el nams 1 in Chemistry

2006-12-15 22:51:24 · 4 answers · asked by starla_o0 4 in Biology

What is physical and chemical changes?
How does each differs from another?
How about the exothermic and endothermic changes?
can you give examples?

May I know your sources? Thank you.

2006-12-15 22:49:32 · 4 answers · asked by mysterio 1 in Chemistry

2006-12-15 22:49:14 · 10 answers · asked by chris h 1 in Zoology

if everyone in China jumped off a chair of the same height at the same time, it would cause a tidal wave big enough to wipe out the whole of Australia?

2006-12-15 22:32:21 · 7 answers · asked by jonny Atlantis 2 in Earth Sciences & Geology

I need but the alternating and direct voltage ratings.Options are (a) 50Vac & 120Vdc (b) 380Vac & 440Vdc (c) 600Vac & 900Vdc (d) 1000Vac & 1500Vdc

2006-12-15 22:29:25 · 1 answers · asked by oje 1 in Engineering

If a few drops of acetone will be placed in a watch glass and be set aside for a few minutes, what type of change is evaporation?

How if about 2mL of acetone will be placed in an evaporating dish and ignite the acetone with a lighted matchstick? What type of change is the burning of a combustible matter?

If a pinch of sugar will be heated in a test tube very strongly, what type of change will take place?

Will there be any change if a few grains of clean sand will be heated?

Please I need your help.
Thank you.

2006-12-15 22:28:52 · 2 answers · asked by jann kyle_upvcc 1 in Chemistry

2006-12-15 22:27:13 · 25 answers · asked by tuk r 1 in Mathematics

I'm gonna take seminar on solar cells.Send me small ccclips &
links.pictures.

2006-12-15 22:25:15 · 5 answers · asked by Anderson 1 in Engineering

2006-12-15 22:22:42 · 3 answers · asked by nvhang 1 in Mathematics

If a grain of table salt will be placed in 5mL of 0.1M silver nitrate, what will be its result? what type of change will take place?

If 0.5g of table salt will be placed in 5mL of water in a test tube, will there be any change in taste and color? If this solution will be placed in an evaporating dish and evaporate to dryness over a flame, how would the residue differ with the original table salt as to color, and reaction with silver nitrate.

What type of change takes place when table salt dissolves in water?

Please I really need your help..
Thank you.

2006-12-15 22:18:22 · 3 answers · asked by jann kyle_upvcc 1 in Chemistry

Stephen Hawking has stated that black holes will eventually evaporate due to Hawking's radiation. If time slows so drastically as you approach a black hole, would you finally be released from the black holes grip when it eventually dissipated and see the last days of the universe?

2006-12-15 22:16:48 · 8 answers · asked by Zefram 2 in Astronomy & Space

Hi, why did the myth propagate that in the desert, the days are hot and the nights freezing cold? I lived in the Middle east and the summer nights were downright hot (80's and 90's for the lows). The winter nights were cool but then the days were pretty mild too. So where in the world can you find burning hot days and freezing cold nights in the SAME season? Does such a place even exist?

2006-12-15 22:14:41 · 7 answers · asked by Anonymous in Weather