Science & Mathematics - 25 October 2007

when the ice tends to insulate the coil from the air why the heating is decrease and what hapen inside the coiles and compressor please gave more information ?

2007-10-25 07:26:33 · 3 answers · asked by khalil c 1 in Engineering

2007-10-25 07:25:50 · 5 answers · asked by Oki 1 in Physics

Than the speed of light, (if it were possible) and travelled back in time to the big bang could you go beyond that time.

2007-10-25 07:25:49 · 11 answers · asked by 00000 3 in Astronomy & Space

2007-10-25 07:25:43 · 1 answers · asked by aa 1 in Earth Sciences & Geology

2007-10-25 07:25:21 · 1 answers · asked by BayAreaCritic.com 1 in Medicine

Also can any body advise any web pages i can look at that will tell me things like how it combines why? Molecular and structural formula, at A level.
Thanks

2007-10-25 07:24:42 · 3 answers · asked by Anonymous in Chemistry

when i say triangle it stands for that symbol that looks just like a triangle .. lol .. please help..

triangleXYZ, <1, <2, and <3 are exterior angles with vertices at X, Y and Z, respectively. The sum of the measures of <1, <2, and <3 is equal to
a. 90
b. 180
c. 270
d. 360

2007-10-25 07:23:49 · 6 answers · asked by Anonymous in Mathematics

2007-10-25 07:23:01 · 5 answers · asked by Day-Z 1 in Earth Sciences & Geology

2007-10-25 07:15:02 · 12 answers · asked by SquiRel 2 in Botany

Three times the second of three consecutive integers is equal to five times the first.

2007-10-25 07:14:53 · 4 answers · asked by Sam o 1 in Mathematics

There are many archaeological findings. All they mean is that something existed. They do not mean that something evolved "FROM" ...

My question is only about possible factual evidence for the "FROM" part. How do we know what evolved FROM what, without relying on theoretical arguments?

(I am interested only in the "evolution of new species" part. Not in the natural selection of populations WITHIN a species, which is well known and understood.)

In my field, nuclear physics, evidence must be clear cut, without hand waving. There is room for theories too, but, they must be clearly labeled as theories. Anyone who tries to label a theory as fact gets booted out...

So, can someone educate me on the factual-experimental evidence for the "FROM" part of evolution?

2007-10-25 07:14:38 · 7 answers · asked by brandlet 2 in Biology

Other than the ones doing it to please an invisible man in the sky.

2007-10-25 07:10:23 · 5 answers · asked by Anonymous in Medicine

Hi guys, I really need help.
So I need find the molecular formula of CuSO4.xH2O.

We used 5.2 g of it, and there was 3.31 g of CuSO4 . With this, I found X to be 5, so, its CuSO4.5H2O

And I found the mass of this to be 250 g. Now how do I get the molecular formula?

Thanks,

-Stan

2007-10-25 07:08:58 · 3 answers · asked by Mike T 1 in Chemistry

2007-10-25 07:07:22 · 4 answers · asked by tghensley 1 in Geography

a. 85
b. 95
c. 133
d. 142

thanks!

2007-10-25 07:06:36 · 9 answers · asked by Anonymous in Mathematics

2007-10-25 07:05:09 · 10 answers · asked by Anonymous in Medicine

How many moles of carbon monoxide gas are produced from the reaction of 5 mol of SnO2 (s) with 9 mol of carbon according to the equation below?

SnO2 (s) + 2C (s) --> Sn (s) + 2CO (g)

2007-10-25 07:04:28 · 5 answers · asked by nancy 2 in Chemistry

2007-10-25 06:58:01 · 4 answers · asked by Sherry 1 in Earth Sciences & Geology

A wire with a resistance of 8.33 x 10^– 5 ohm/cm carries a current of 1.28 amp.

(a) How many electrons move through the wire per second?
(b) What voltage is required to produce this current through 800-m wire?

2007-10-25 06:57:34 · 2 answers · asked by MiG 2 in Physics

The vertical rods each have mass of 14 g; the horizontal rod has mass of 48 g.
Where is the center of mass of the assembly?
(x, y) = ( , ) cm

2007-10-25 06:56:03 · 2 answers · asked by Wonder 2 in Physics

A. hydrochloric acid
B. acetic acid
C. sodium hydroxide
D. ammonia

2007-10-25 06:55:02 · 3 answers · asked by Broken Blue Eyes 6 in Chemistry

San Diego is right next to the Pacific Ocean. Why can't salt water from the ocean be used to help figth the fires?

2007-10-25 06:53:12 · 9 answers · asked by i_squeeze 1 in Earth Sciences & Geology

A. Modified Mercalli Intensity Scale

B. S-P Time Scale

C. Richter magnitude scale

D. Earthquake Zone Scale

2007-10-25 06:53:03 · 4 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-25 06:51:15 · 4 answers · asked by asst3@sbcglobal.net 1 in Chemistry

a. 4
b. 2
c. -3
d. 5

2007-10-25 06:50:43 · 7 answers · asked by Anonymous in Mathematics

a. 1
b. -1
c. 5/3
d. none of theese

2007-10-25 06:48:01 · 3 answers · asked by Anonymous in Mathematics

a. - 7/3
b. 3/7
c. - 3/7
d. 7/3

2007-10-25 06:46:57 · 5 answers · asked by Anonymous in Mathematics

Why or why not. Sources would be helpful.

2007-10-25 06:44:29 · 3 answers · asked by bumblebee 4 in Biology

2007-10-25 06:43:00 · 7 answers · asked by Anonymous in Agriculture

A 34.0 kg seal at an amusement park slides down a ramp into the pool below. The top of the ramp is 1.55 m higher than the surface of the water and the ramp is inclined at an angle of 30.0° above the horizontal. The seal reaches the water with a speed of 4.90 m/s.

(a) What is the work is done by kinetic friction?

(b) What is the coefficient of kinetic friction between the seal and the ramp?

Neither my friend nor I can figure this one out. Any help will be very much appreciated. Thanks!!!

2007-10-25 06:41:05 · 4 answers · asked by Imagine 1 in Physics