Science & Mathematics - 6 November 2007

Hello

I have a few questions for anyone who has had bi-pass open heart surgery. My father 53 years old had a 5 way bypass October 19th he has came home and is sleeping in a hospital bed. Even though he is out of the hospital he is still not able to sleep very well he is taking about 7-10 different meds at one time and has even been taking half of a sleeping pill and was told to take a tylonal pm this has not helped and making him fill weaker. Did anyone have any of the same problems i like to say to him he's not alone on this problem may make him fill a little better. Also if anyone knows of anyway to find support groups for him that be great to and any other encouraging advice you might give for them would be most helpful!

Thank you!

2007-11-06 15:43:23 · 2 answers · asked by cwa 2 in Medicine

Substance X has a melting point higher than 500 degree celsius. It is insoluble both in water and in organic solvents. It conducts electricity both when solid and when molten. What could X be?

(1) copper
(2) magnesium oxide
(3) poly(ethene)
(4) silica
(5) sodium chloride

The answer is (1) copper..why? I don't understand..Please explain..Thanks.

2007-11-06 15:42:26 · 1 answers · asked by Anonymous in Chemistry

Is the fraction 9/11 larger than or less than the fraction 2/7?
Aso include percents for 2/7 and 9/11

2007-11-06 15:42:17 · 25 answers · asked by Dumb Giirl 1 in Mathematics

2007-11-06 15:38:41 · 5 answers · asked by Anonymous in Astronomy & Space

Find a fundamental set of solution for the differential equation

2y''-10y'+6y=0

determine the general solution
and find the solution of the equation with the initial condiction y(-square root 3)=0 and y'(-square root of 3)=0

2007-11-06 15:37:05 · 1 answers · asked by cafet 1 in Mathematics

In a mixture of H2 and CH4 gases, the partial pressure of H2 is 0.120 atm. The total pressure is 0.415 atm. The temperature is 30.0oC. If the total volume of the gas mixture is 394 mL, what is the mass of CH4 in grams?

2007-11-06 15:33:56 · 1 answers · asked by metalmonkey71 1 in Chemistry

I have the problem 2|x-7|+3>5 The answer I got was 83 is this correct? I don't think you distribute with aboslute value. Is this correct?

Thanks!

2007-11-06 15:32:14 · 6 answers · asked by Anonymous in Mathematics

in a Synthesis of Isopentyl Acetate (Banana Oil) lab can some one help me with this questions
1. What is the purpose of washing the organic layer with 5% aqueous sodium bicarbonate? Remember, you used an excess of glacial acetic acid.
2. What is the purpose of washing with 25 mL of water?
3. Why is it necessary to record the barometric pressure when distilling at atmospheric pressure?

2007-11-06 15:29:16 · 5 answers · asked by Anonymous in Chemistry

How goof are you at improvising related words into one sentence that makes sense? You know, the periods and epochs of the geologic time scale. I'd like them in a sentence that will help me remember them, but i dont have that sentence...
periods: quaternary, tertiary, cretaceous, jurassic, triassic, permian, pennsylvanian, mississipian, devonian,silurian, othodovician and cambrian.
EPOCHS: Holocene, Pleistocene, Pliocence, Miocene, Oligocene, eocene and paleocene.

2007-11-06 15:27:55 · 5 answers · asked by Anansi 2 in Earth Sciences & Geology

has anny one else herd about roods i just seen a film clip a bout theas knew flying creatchers that fly at speeds of seven to nine hundret miles an houre i want to know if you think this is just a nother mith or do we findly have the tenlge to see them .i cant spell sos

2007-11-06 15:27:29 · 2 answers · asked by Anonymous in Astronomy & Space

I have been sick for about two weeks with a feaver, headache, sour throat, and more and haven't been able to finish my science homework. If anyone could help me out, that would be great.
I need to know under which color light would the rate of photosynthesis be highest and which would be lowest out of the colors red, blue, and green. I'm really sorry that I have bothered everyone with this question but it would mean a lot to me if someone would please help me out.

2007-11-06 15:27:24 · 2 answers · asked by Careline C 1 in Other - Science

I need a slogan to put on a surgery interest group for med students. Help!! Puns are welcome!

2007-11-06 15:26:41 · 6 answers · asked by Anonymous in Medicine

An open box is to be made from a rectangular piece of material by cutting equal squares from each corner and turning up the sides. Find the dimensions of the box of maximum volume if the material has dimension of 2 feet by 3 feet.
answer: 5-sqrt(7)/6ft. by 1+sqrt(7)/3ft. by 4+sqrt(7)/3ft.
I have a answer, but I want to learn how to solve it. This is a calculus problem.

2007-11-06 15:26:17 · 3 answers · asked by I need help 1 in Mathematics

Not sure how to work this problem.

a spotlight on the ground shines on a well 12 meters away. If a man 2meters tall walks from the spotlight toward the building at a speed of 1.6m/s, how fast is the length of his shadow on the building decreasing when he is 4 m away from the building?

THANKS

2007-11-06 15:16:38 · 1 answers · asked by joe 1 in Mathematics

A man 6 feet tall walks at a rate of 5 feet per second away from a light that is 15 feet above the ground. When he is 10 feet above the ground,


a) at what rate does the tip of the shadow moving

for the tip why are you trying to find the whole length? Shouldnt you only try to find the part for the shadow?

the answer is 25/3 but i need help for explaining what the tip of the shadow means in this problem.

2007-11-06 15:14:53 · 5 answers · asked by Adam d 1 in Mathematics

I was just wondering how big can an earthquake really be. Also anyone know any info on what the magnitude of the upcoming San Andreas Fault earthquake or "THE BIG ONE".

2007-11-06 15:14:15 · 1 answers · asked by Isaac 2 in Earth Sciences & Geology

An organic compound contains C, H, N, and O. Combustion of 0.1023 g of the compound in excess oxygen yielded 0.2766 g of CO2 and 0.0991 g of H2O. A sample of 0.4831 g of of the compound was analyzed for nitrogen by the Dumas method. At STP, 27.6 mL of dry N2 was obtained. In a third experiment the density of the compound as a gas was found to be 4.02 g/L at 127°C and 256 torr. What are the empirical formula and the molecular formula of the compound?

I got C24H42O3N for the empirical formula. but that is totally wrong. could someone please help me
please and thank you

2007-11-06 15:13:39 · 1 answers · asked by Yongsun S 2 in Chemistry

Is in 1 aspirin

2007-11-06 15:13:16 · 2 answers · asked by David C 2 in Medicine

102. mL of a solution of quinine contains 206.0 x 10-3 mol of quinine. If this is titrated with 0.0200 M HCl, what is the pH at the stoichiometric point? Quinine is monobasic with
Kb = 7.90 x 10-6

thanks!!!

2007-11-06 15:12:23 · 1 answers · asked by TBMlover 1 in Chemistry

a few exam questions that are throwing me...
A 480 kg car moving at 14.4 m/s hits from behind another car moving at 13.3 m/s in the same direction. if thee second car has a mass of 570 kg and a new speed of 17.9 m/s what is the velocity of the first car after the collision?

A child pulls on a wagon handle at an angle 37° above the horizonatal with a force of 45N. if the wagon accelerates at 8.1m/s^2 horizontally, what is the mass of the wagon?

A person who normally weighs 200 lbs is standing on a scale inside an elevator. the elevator is moving upwards with a speed of 7 m/s, then begins to slow down at a rate of 5 m/s^2. before the elevator begins to slow down, the reading of the scale is ? and while the elevator is slowing down the reading of the scale is?
The choices are:
less than 200lbs, 100lbs
greater than 200lbs, 100lbs
200lbs, 100lbs
greater than 200lbs, 0lbs
none

THANKS

2007-11-06 15:12:08 · 1 answers · asked by nothankyou1110 2 in Physics

Calculate the pH of the solution that results from the addition of 0.020 moles of HNO3 to a buffer made by combining
0.500 L of 0.290 M HC3H5O2 ( use Ka = 1.30 x 10 -5 )
and 0.500 L of 0.580 M of the conjugate base of acid ?

thanks!!

2007-11-06 15:11:42 · 1 answers · asked by TBMlover 1 in Chemistry

i posted that i need to know how to set up a trihybrid cross with Tt Yy Rr Bb but now i have it setup does each square have 8 letter to a box? like TTRRYYBB?

2007-11-06 15:11:31 · 2 answers · asked by the student 2 in Biology

a. h20
b atp
c pyruvic acid
d nadh + H+
e C02

2007-11-06 15:08:05 · 1 answers · asked by madison 1 in Biology

2007-11-06 15:04:01 · 2 answers · asked by britt-britt r 1 in Engineering

I am doing a debate and Im on the negative side of it. Its for global warming and using a nuclear power policy to reduce CO2 emissions....This is just a project-nothing real so please I dont need any opinions on what you think about it...I just need a plain simple answer on how long it takes to build power plants and where you got the source...

2007-11-06 15:02:58 · 4 answers · asked by jessica 1 in Engineering

This is probably a stupid question, but Draco can be seen in which part of the sky right now? I'm pretty sure the north, but I'm not totally positive. Astronomy isn't my strong point. I really need the answer for a paper I'm writing in Science.

2007-11-06 15:01:53 · 7 answers · asked by Violetcarson 2 in Astronomy & Space

2007-11-06 15:00:02 · 2 answers · asked by catsangel777 4 in Botany

2007-11-06 14:58:44 · 4 answers · asked by britt-britt r 1 in Physics

since photosynthesis produces sugar and cell respiration uses sugar. how one process is the opposite of the other?

2007-11-06 14:56:54 · 5 answers · asked by Anonymous in Biology

please respond ASAP
thanks!

2007-11-06 14:56:41 · 6 answers · asked by cowsgomoo123 2 in Chemistry