Science & Mathematics - 15 December 2007

My little brother is doing a project on Suriname and he or my mom can't find anything. Could someone please help me out?

2007-12-15 07:41:59 · 11 answers · asked by Anonymous in Geography

What are some chemical proporties of phosphorus...wat are its uses....where can we find it on our planet and what would it look like...what color is it normally.....is it a solid,liquid,or gas

2007-12-15 07:41:58 · 6 answers · asked by mainchris 1 in Earth Sciences & Geology

coventional flow of current........................................

2007-12-15 07:39:29 · 11 answers · asked by Anonymous in Engineering

Which of the two element is the biggest threat?

2007-12-15 07:37:36 · 6 answers · asked by Anonymous in Chemistry

Write the balanced equation for the reaction of magnesium with oxygen gas to form magnesium oxide. Since oxygen is a diatomic element, use O2 in the reaction.

I think that the equation needing to be balanced is Mg + O2 --> MgO. I'm just not sure how to balance it. Thanks for your help!

2007-12-15 07:37:26 · 4 answers · asked by Steven M 3 in Chemistry

i mean e.g. ultrasound and MRI scans that r harmless, and can detect cancer early before it is too late to cure it (some cancer types develop within 3 months rather then 3 years e.g. thyroid anaplastic cancer, etc . why r we not doing them say each 2-3 months to be on safe side? is it due to costs or pure stupidity? better be safe then sorry no?

2007-12-15 07:35:53 · 10 answers · asked by Anonymous in Medicine

i have a stupid project due on January 7th which is why i need this stupid pic so anytime soon would be nice!

2007-12-15 07:34:26 · 2 answers · asked by Anonymous in Geography

2007-12-15 07:33:17 · 1 answers · asked by blink182 3 in Biology

I had trouble figuring this..so help..thanks

2007-12-15 07:32:45 · 1 answers · asked by Richi 1 in Biology

The question is "find the equation of the line passing through (0, -3) with slope 3/4th y= ?? Thanks sooo much!!!

2007-12-15 07:30:17 · 4 answers · asked by hipmamma25 1 in Mathematics

2007-12-15 07:29:17 · 7 answers · asked by Audrey 1 in Astronomy & Space

How does meiosis ensure genetic diversity?

2007-12-15 07:26:20 · 5 answers · asked by carmelboy91 2 in Biology

Is it possible for a planet to have no magnetic field such as Earth's, or will one always be present? Similarly, are several magnetic poles possible, eg three 'Norths'?

2007-12-15 07:26:09 · 24 answers · asked by Buzzard 7 in Astronomy & Space

A ball on the end of a string is cleverly revolved at a uniform rate in a vertical circle of radius 60.0 cm. Its speed is 4.30 m/s and its mass is 0.300 kg.

(a) Calculate the tension in the string when the ball is at the top of its path.
N
(b) Calculate the tension in the string when the ball is at the bottom of its path.
N

2007-12-15 07:23:36 · 1 answers · asked by Daydreamer 3 in Physics

Compare the structure and functions of mitochondria and chloroplasts?

2007-12-15 07:23:11 · 5 answers · asked by Richi 1 in Biology

A 0.40 kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.2 m on a frictionless horizontal surface. The cord will break when the tension in it exceeds 61 N.

(a) What is the maximum speed the ball can have?

(b) How would your answer be affected if there were friction?

2007-12-15 07:21:07 · 1 answers · asked by Daydreamer 3 in Physics

Only one harbouring life. Can it really be possible?

2007-12-15 07:20:39 · 7 answers · asked by Trys 1 in Astronomy & Space

A fireman standing on a 12 m high ladder
operates a water hose with a round nozzle of
diameter 1.51 inch. The lower end of the hose
(12 m below the nozzle) is connected to the
pump outlet of diameter 2.98 inch. The gauge
pressure of the water at the pump is

P(guage of pump)= P(abs of pump)-P(atm)=81PSI=558.475 kPa

Calculate the speed of the water jet emerg-
ing from the nozzle. Assume that water is
incompressible liquid of density 1000 kg/m^3
and negligible viscosity. The acceleration of
gravity is 9.8 m/s^2. Answer in units of m/s.

2007-12-15 07:17:41 · 1 answers · asked by akanthasy 1 in Physics

Pake I'm sure you know the answer to this...

2007-12-15 07:15:59 · 15 answers · asked by Anonymous in Geography

2nd derivative of y= 2/(4-x)

2007-12-15 07:14:58 · 10 answers · asked by remote control 1 in Mathematics

2007-12-15 07:12:40 · 7 answers · asked by Anonymous in Biology

Here is the question:

An example of a raised,flat area is/are the___.
A.Grand tetons
B.Coastal Plains
C.Colorado Plateau
D.Appalachians

2007-12-15 07:10:27 · 14 answers · asked by Anonymous in Earth Sciences & Geology

2007-12-15 07:08:13 · 12 answers · asked by Anonymous in Agriculture

a map that included Africa countries and their capitals so i can read them. have any ideas? please help me!

2007-12-15 07:03:28 · 7 answers · asked by Anonymous in Geography

Gotta cold rain here in the south..Is it snowing, raining or what where you live?

2007-12-15 07:03:23 · 19 answers · asked by Anonymous in Weather

Just looking for a well made tool to discharge capacitors in various electronic equipment. I know they are easily built, but I haven't see a nice commercial solution.

2007-12-15 06:57:09 · 4 answers · asked by Anonymous in Engineering

∫ x^(2) e^(x^3) dx

2007-12-15 06:53:51 · 3 answers · asked by Hinal P 1 in Mathematics

2007-12-15 06:48:59 · 8 answers · asked by Anna S 1 in Earth Sciences & Geology

I am confused as to how to go about this problem. We are studying optimization in calculus. Thank you for any help!

A piece of wire 10 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral triangle. How should the wire be cut so that the total area enclosed is (a) maximum and (b) a minimum.

2007-12-15 06:46:50 · 1 answers · asked by sg88 1 in Mathematics

We have tons of snow here, its beautiful. If it is, what are you doing on this snowy, cold day?

2007-12-15 06:46:40 · 8 answers · asked by Macy 4 in Weather