Science & Mathematics - 1 December 2006

the lighter elements would be layered deeper gradually down, the center being the atmosphere to almost vacum in the center(is it possible to create a model?)

2006-12-01 08:23:57 · 3 answers · asked by drozzie1 1 in Physics

2006-12-01 08:21:54 · 4 answers · asked by Nicole S 1 in Mathematics

2006-12-01 08:21:06 · 12 answers · asked by Anonymous in Biology

2006-12-01 08:18:23 · 5 answers · asked by sam s 1 in Mathematics

2006-12-01 08:18:17 · 3 answers · asked by tyreesesmum 2 in Physics

Calculate the flow rate of blood (density = 1.15 g/cm^3) in an aorta with a cross-sectional area of 2.54 cm^2 if the flow speed is 48.9 cm/s (in g/s).

Assume the aorta branches to form a large number of capillaries with a combined cross-sectional area of 2720 cm^2, what is the flow speed in the capillaries (in cm/s)?

2006-12-01 08:17:47 · 1 answers · asked by Dee 4 in Physics

Let's say I want to create an Esbit tablet, so I would take CH2O + NH3. But how exactly would I put those together? Put them in a pot and stir? Elevate the temperature? How do I know what method to use?

2006-12-01 08:16:53 · 2 answers · asked by Samuel 5 in Chemistry

A 0.440 kg ice puck, moving east with a speed of 3.04 m/s, has a head-on collision with a 0.950 kg puck initially at rest. Assume a perfectly elastic collision. Use east as the positive axis.

What is the speed of the lighter puck?

What is the speed of the heavier puck?

How would you answer this hard question?

2006-12-01 08:14:09 · 1 answers · asked by john c 1 in Physics

2006-12-01 08:10:17 · 19 answers · asked by nick 1 in Geography

2006-12-01 08:07:51 · 16 answers · asked by Anonymous in Botany

I'm designing a fixture to test a 12vdc & 24vdc motor at different times. The fixture has a dual output (12&24) DC power supply.

The operator of the fixture needs to change the voltage between 12 & 24 vdc. The motor leads are connected to a pair of spring loaded binding post. The voltage at the posts needs to change.

Is a rotary switch the answer? Any recommendations?

Thanks

Mark

2006-12-01 08:07:21 · 4 answers · asked by villanovagb 2 in Engineering

Write the balanced net equation for the reaction that occurs when 0.1 M solutions of the following are mixed: Be sure to add (aq) for aqueous species and (s) for solid species

1. cadmium(II) nitrate and ammonium carbonate
2. potassium hydroxide and iron(III) acetate

2006-12-01 08:06:24 · 3 answers · asked by HL 1 in Chemistry

Is there a deep purple in so tell me how to mix please

2006-12-01 08:04:52 · 9 answers · asked by Ireqiredlotofhelp 1 in Other - Science

(2x^7y^2/4xy^3) ^2

i totally forgot how to do this and im trying to study for my placement test that's next week. Please just tell me the steps or something! Thanks.

2006-12-01 08:04:24 · 5 answers · asked by Anonymous in Mathematics

2006-12-01 07:59:44 · 4 answers · asked by Anonymous in Mathematics

1. 2x"3+10x square+8x
2. 4a"3-4a square - 48a
3. 2x"5-6x"4-36x"3

2006-12-01 07:58:49 · 2 answers · asked by guyana_bhai_2003 1 in Mathematics

2006-12-01 07:57:43 · 20 answers · asked by Caroline 3 in Biology

We're studying these two bonds for the next 7 days, and i am absolutely not getting it at all. I know this is a little vague, but I'm not required to know too much in detail, just the basics. Can someone be kind enough to differentiate between the two a little?

2006-12-01 07:56:05 · 3 answers · asked by Anonymous in Chemistry

2006-12-01 07:56:02 · 3 answers · asked by johnhildeb 3 in Mathematics

A skydiver of mass m jumps from a hot air balloon and falls a distance d before reaching a terminal velocity of magnitude v. Assume that the magnitude of the acceleration due to gravity is g. What is the work Wd done on the skydiver, over the distance d, by the drag force of the air?
Express the work in terms of d, v, m, and the magnitude of the acceleration due to gravity g.
And Find the power Pd supplied by the drag force after the skydiver has reached terminal velocity v.

2006-12-01 07:55:47 · 1 answers · asked by Leah 2 in Physics

or in motion at a constant speed along a straight line?

2006-12-01 07:55:31 · 5 answers · asked by Anonymous in Physics

2006-12-01 07:54:33 · 7 answers · asked by johnhildeb 3 in Mathematics

2006-12-01 07:53:09 · 7 answers · asked by The Apostle 2 in Engineering

water is stored in inverted cone with the tip of the cone pointed downward. the radius of the cone at the top is 10 feet while the height is 25 feet.Suppose the level of water at any time in the cone is "h" feet and the radius of the circular surface of water is "r" feet, derive an expression for the volume of the water in the cone as a function of the depth of "h".

2006-12-01 07:52:04 · 3 answers · asked by johnhildeb 3 in Mathematics

34+5+7-8-25+554+65654(6-99)

2006-12-01 07:51:00 · 4 answers · asked by Lutria 2 in Mathematics

2006-12-01 07:49:27 · 2 answers · asked by ZANITA T 1 in Astronomy & Space

1. 2x"3+10x square+8x
2. 4a"3-4a square - 48a
3. 2x"5-6x"4-36x"3

2006-12-01 07:49:18 · 2 answers · asked by guyana_bhai_2003 1 in Mathematics

2006-12-01 07:46:49 · 3 answers · asked by Shelly H 2 in Mathematics

Questions 3: The number 916238457 is an example of a nine-digit number which contains each of the digits 1 to 9 exactly once. It also has the property that the digits 1 to 5 occur in their natural order, while the digits 1 to 6 do now. How many such numbers are there?
I would like the numerical answer to this, but please only answer if you did the BMO 2006 and have a proof as well.

2006-12-01 07:45:59 · 2 answers · asked by Mark R 2 in Mathematics

In the following puzzle, 10 different letters are used, each representing a different digit from 0 to 9. (The underscores were added to get the columns to line up properly?) Can you reconstruct the multiplication problem?

_ _ _ P R S T
_ _ _ _ U V N
------------------
_ _ Y T T U X
X X V X X
------------------
X X N Z R U X

2006-12-01 07:44:10 · 3 answers · asked by Anonymous in Mathematics