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Science & Mathematics - 6 November 2007

[Selected]: All categories Science & Mathematics

Agriculture · Alternative · Astronomy & Space · Biology · Botany · Chemistry · Earth Sciences & Geology · Engineering · Geography · Mathematics · Medicine · Other - Science · Physics · Weather · Zoology

Assue there are beings living on Pluto who are interested in Astronomy. Their Astronomers are able to measure the apparent positions of stars( i.e. angles between stars) with the same accuracy as we can here on Earth. The distance from Pluto to the Sun is about 40A.U.
1)Would the aberration of starlight be greater or less on Pluto than on Earth? Why?
2)How much dimmer does the Sun appear from Pluto than from the Earth?

2007-11-06 16:32:33 · 3 answers · asked by Anonymous in Astronomy & Space

find the equation of the tangent to the curve y = 2x - x^2 that is perpendicular to the line x + 4y - 8 = 0

2007-11-06 16:31:09 · 3 answers · asked by Anonymous in Mathematics

http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Algebra%20II/304a/Picture4.png

2007-11-06 16:29:01 · 4 answers · asked by Anonymous in Mathematics

2007-11-06 16:28:45 · 2 answers · asked by Anonymous in Biology

A ruptured oil tanker causes a a circular oil slick on the surface of the ocean. When its radius is 150 meters, the radius on the slick is expanding by 0.1 meter/minute and its thickness is 0.02 meter. At that moment:

a How fast is the area of the slick expanding?

b The circular slick has the same thickness everywhere, and the volume of the oil spilled remains fixed. How fast is the thickness of the slick decreasing?


Please Help

2007-11-06 16:28:13 · 2 answers · asked by hud 3 in Mathematics

why process aneal copper. please sombody help

2007-11-06 16:27:10 · 2 answers · asked by Anonymous in Other - Science

http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Algebra%20II/304a/Picture2.png

2007-11-06 16:27:10 · 7 answers · asked by Anonymous in Mathematics

You transferred 20. mL of acetic acid solution to an Erlenmeyer flask and added 2 drops of phenolphthalein solution. You filled your buret with 0.10 M NaOH so that the initial buret reading was 2.69 mL. After titrating your sample to the faint-pink phenolphthalein endpoint, the final buret reading was 17.19 mL.

1) How many moles of NaOH were delivered to the flask?

2)What is the concentration of the acetic acid solution?

2007-11-06 16:25:34 · 1 answers · asked by mark 2 in Chemistry

acidosis (pH 6.90) that requires immediate intervention. Which of the following strategies would be most effective to regulate normal blood pH:

a. Decrease CO2 levels (PCO2) through active ventilation
b. Titrate blood with a slow infusion of NH4Cl (aq)
c. Increase CO2 levels (PCO2) through active ventilation
d. Titrate blood with a slow infusion of HCl (aq)
e. Consult a chemist

2007-11-06 16:23:10 · 3 answers · asked by Anonymous in Medicine

give details please,if u have time

2007-11-06 16:21:21 · 5 answers · asked by Sean M 1 in Weather

2007-11-06 16:19:24 · 2 answers · asked by Anonymous in Engineering

If there is no variation in a population, or if the only variation is acquired and not inherited, or if all of progeny survive to equally reproduce, will evolution occur? What's your opinion?

2007-11-06 16:15:25 · 18 answers · asked by ZORRO 3 in Other - Science

sin² 180/18 + sin²180/9 + sin² 7X180/18 + sin²4 X 180/9 = 2

prove it

Question from book R.D Sharma Class-XI of chapter: Trigonometric functions..


plz help me

2007-11-06 16:14:26 · 3 answers · asked by Amar 2 in Mathematics

All of the adjacent sides of quadrilaterals have slopes with a product of -1?

2007-11-06 16:11:41 · 2 answers · asked by dazed and confused 2 in Mathematics

please only answer if you know what you are talking about.
=]

2007-11-06 16:11:00 · 2 answers · asked by alyssa_17t 1 in Physics

Nickel has a face-centered cubic unit cell. The density of nickel is 6.84 grams per centimeter cubed
Atomic weight of Nickel = 58.71 g/mol

2007-11-06 16:08:33 · 1 answers · asked by unique_fantasy 1 in Chemistry

what about a plant growing taller? is it a physical reation?

2007-11-06 16:07:57 · 8 answers · asked by Anonymous in Chemistry

I know no one really knows the answer but have any of you ever thought about this?

2007-11-06 16:07:56 · 12 answers · asked by Tnisha 1 in Biology

How is it different from group II with Cl2
and Group I with Br2?

2007-11-06 16:04:43 · 1 answers · asked by K3iKo 1 in Chemistry

Hello, just joined a recent team who has been investigating paranormal activity,ect. regarding ghosts/spirits.
Never have I participated in an investigation b4, any tips from the experts or those who are experienced?
TY

2007-11-06 15:59:26 · 8 answers · asked by deirdrefaith 4 in Paranormal Phenomena

If the pile of books has a mass of 12.60 kg, a length of 33.02 cm, a width of 33.02 cm, and
a height of 25.45 cm, how much pressure (N/m2) must the table be able to withstand at any place
where the books are placed ?

2007-11-06 15:57:27 · 1 answers · asked by Anonymous in Chemistry

Say the 5-digit number is 78251.

2007-11-06 15:56:27 · 4 answers · asked by ¤j¸g ± 1 in Mathematics

You dissolve 0.33 g of KHP in 20 mL of water and titrate with the NaOH solution. To the nearest mL, calculate the volume of NaOH solution expected assuming that the NaOH concentration is ~0.1 M.

2007-11-06 15:54:06 · 2 answers · asked by poo 2 in Chemistry

If Orgo is 35 meters from Zorna,how high is the kite?

Plz help i dont get it

2007-11-06 15:47:10 · 3 answers · asked by Kericho C 1 in Physics

I am having an MRI done with dye injected into my hip tomorrow morning. The hospital I am going to isn't being very helpful on telling what to do to prepare. I have heard mixed things about what you can and can not do. Like... No eyeshadow because of metallic parts? Some people have said you can't eat. Basically I am just wondering what the basics are. Can I wear bronzer, powder, stuff like that? I only ask about makeup cause I have to go to work right after. What about the nail polish I have on, do I need to take it off? Oh, and they said this is going to hurt cause the dye is going straight into my joint so I wanted to know if it is ok to take my prescribtion pain killer tramadol and also some advil.

Thanks!

2007-11-06 15:46:58 · 4 answers · asked by daisy2094 3 in Medicine

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