Science & Mathematics - 2 November 2007

Hi I have an 8" Celestron Schmidt Cassegrain, and I have a 13mm Plossl, a 40mm Plossl, and a 2X Barlow. The eyepieces are both made by Celestron.

When I am doing astrophotography I can only take pictures through the 40mm eyepiece because the opening in the 13mm is too narrow.

Is there another type of eyepiece where a 13mm would have a larger hole to look/shoot through? And if so what would be a good choice? Thanks.

I don't know that much about the different brands but I would like the quality to at least equal what I have now.

2007-11-02 15:45:34 · 3 answers · asked by Anonymous in Astronomy & Space

Can you list out the source (i.e. diet) of the following vitamins and what disease/disorder would arise due to its deficiency?

Vitamins A
Vitamins C
Vitamins D
Vitamins K

2007-11-02 15:44:48 · 2 answers · asked by Anonymous in Medicine

Let f be the function defined by y = f(x)= 5 x^2.
Find the actual change in y when x changes from 1 to 1.2.
_________?


Also, Use the differential dy of the function f to find the APPROXIMATE change in y when x changes from 1 to 1.2
__________?

2007-11-02 15:43:48 · 1 answers · asked by Anonymous in Mathematics

2007-11-02 15:43:43 · 3 answers · asked by Anonymous in Physics

I'm studying for my A&P exam and I know 3, changed in respiratory rate, cardiac output and blood pressure, but what brings about these changes and why do they take place?

2007-11-02 15:43:33 · 2 answers · asked by Anonymous in Medicine

2007-11-02 15:42:11 · 1 answers · asked by Anonymous in Medicine

How can a human body be used as a metaphor for the 12 cell organelles which are the cell wall, cell membrane, endoplasmic reticulum, ribosomes, lysosomes, mitochondria, golgi bodies, vacuoles, nucleus, nucleoli, chromatin, and chloroplasts? For example I already know that a metaphor for nucleus can be a human brain, but the rest i dont kno so can u help me cuz i need it ASAP! Thanx and the best answer and most info gets 10 points!!!!!!

2007-11-02 15:41:45 · 5 answers · asked by I♡2PM!! 2 in Biology

2007-11-02 15:37:35 · 28 answers · asked by ƒαηтαѕтι¢ ☞CAT☜ 7 in Geography

What is the greatest mathematical equation and what good is it?

2007-11-02 15:35:35 · 10 answers · asked by sunrayman123 3 in Mathematics

According to the Mayan calendar the Sun is in direct alignment with the center of our galaxy, and the calendar ends on that date, is that it or is there more? AAHH!! Well. whatever it is I'll be here to see it and who wants to live forever anywho?

2007-11-02 15:35:27 · 21 answers · asked by banditoauu 2 in Astronomy & Space

I'm doing a bottled ecosystem project for biology and I have no clue how to start it. We are suppose to have the ecosystem last for 2 months. Should terrestrial go on top, so when the water evaporates the plants are watered? What organisms should I put in there that will last 2 months. What plants could give off a lot of oxygen to keep the organisms alive( its Fall). I live in Montana and I need organisms that I can get fast.

Anything is appreciated!!!!!!! Thanks

2007-11-02 15:28:52 · 3 answers · asked by Simba 2 in Biology

i will be happy if i can get answers from u like people

2007-11-02 15:28:16 · 2 answers · asked by aryan 1 in Physics

how tall is it and how wide is it and how heavy is it?

2007-11-02 15:26:36 · 4 answers · asked by Anonymous in Geography

let a=(sqr root 2) ^ (sqr root 2). simplify a ^(sqr root 2). Conclude that there are examples of irrational numbers x and y such that x^y is rational.

2007-11-02 15:24:44 · 5 answers · asked by xxx 1 in Mathematics

2007-11-02 15:21:22 · 2 answers · asked by Anonymous in Physics

2007-11-02 15:20:38 · 2 answers · asked by Anonymous in Physics

2007-11-02 15:20:07 · 3 answers · asked by Anonymous in Physics

2007-11-02 15:19:10 · 3 answers · asked by Anonymous in Physics

We recently separated the pigments in a spinach leaf using chromatography with a solvent of 90% petroleum ether and 10% acetone solvent and our teacher wants us to compare our Rf values to standardized values that may or may not be published in books.

I've looked through some books on chromatography today at a library but couldn't find any values.

My question is, is there any specific book titles i should be looking for?

2007-11-02 15:17:53 · 2 answers · asked by fye 1 in Botany

I teach college classes part time, and am discouraged by how many high school graduates are so poorly prepared for college. I am concerned about our ability as a nation to compete in the future.

2007-11-02 15:13:06 · 14 answers · asked by don1862 4 in Engineering

needs to block fm signal from close range, i know its illegal but its in the name of science.

2007-11-02 15:08:35 · 4 answers · asked by Mike D 2 in Engineering

i know both kinds are good but i would like a good quality one that isnt too pricy and one that is popular among other ametuer astronomers like myself. i know the difference between the two but i just wanted some opinions on what other people think about which one has a better overall quality.

2007-11-02 15:07:22 · 9 answers · asked by kralcck217 2 in Astronomy & Space

Clue provided for question: A river of southeast South America rising in southern Brazil and flowing west and south along the Brazil-Argentina border and the Argentina-Uruguay border to the Rio de la Plata.

Thanks, more questions on profile for those who want some points.

2007-11-02 15:05:48 · 2 answers · asked by marshimaro1993 4 in Geography

2007-11-02 15:05:40 · 2 answers · asked by Anonymous in Zoology

2007-11-02 15:03:44 · 7 answers · asked by lere 3 in Astronomy & Space

I have to do a crossword puzzle and some of the clues the teacher gave me were very vauge and i cant find the answer so here are the clues.. ..

1. A Very Complex Carb (9 letters)
2. Part of an Amino Acid (5 letters)
3. Found in RNA but not DNA (6 letters)
4. A polysaccharide (8 letters)
5. A functional protein ( 6 letters)

thanks in advance
~*MAC*~

2007-11-02 15:03:27 · 3 answers · asked by Anonymous in Biology

twelve days ago, i bumped into a woman that i did not know. she looked me in the eyes and said, "Sven is an elf living in the Appalachains," then walked away. In retrospect, this woman did look like a sixty-year old version of me and also one of my dreams is to build a time machine. Do you guys think that i've succeeded?

2007-11-02 15:02:33 · 7 answers · asked by Samantha 3 in Paranormal Phenomena

a monkey and a human reproduced ? or like a cat and a tiger ?

2007-11-02 14:59:13 · 6 answers · asked by Anonymous in Zoology

Consider the results of the following cross: RR x rr

(R is dominant and results in a wild type phenotype.)

The allele for wild type is said to be dominant, so why is it, for some alleles, the answer is not wild type? How can a defective allele present in one copy along with a wild type one, show the phenotype of a homozygous defective individual?

2007-11-02 14:49:54 · 2 answers · asked by Anonymous in Biology

What is it called?!?!

2007-11-02 14:49:06 · 24 answers · asked by Megan D 1 in Biology