Science & Mathematics - 30 June 2007

Intersecting lines are perpendicular.

Always

Sometimes

Never

Not enough information

2007-06-30 15:52:31 · 5 answers · asked by Anonymous in Mathematics

2007-06-30 15:45:09 · 3 answers · asked by Anonymous in Earth Sciences & Geology

The purchasing manager for a firm is trying to determine what the safety stock should be for a particular product. She has developed the following table, which gives the distribution of demand during the lead-time and the probabilities:

Demand during lead time / probability
40/ 0.2
50/ 0.25
60/ 0.25
70/ 0.2
80/ 0.1
The carrying cost is $5 per unit per year, the ordering cost is $30 per order, and the stockout cost is $40 per unit. The reorder point is 60 units, and 6 orders are placed each year. What level of safety stock should be maintained?
ROP (reroder point)=d (daily demand) x L (order lead time) +SS (safety stock)
I don't know how to solve it.

2007-06-30 15:44:31 · 2 answers · asked by Anonymous in Mathematics

2007-06-30 15:43:37 · 3 answers · asked by Anonymous in Chemistry

i told my 9 year old son to try to conserve the water, and he asked me why, he's pretty smart so i try to answer his questions correctly

2007-06-30 15:42:02 · 9 answers · asked by ME!! 2 in Earth Sciences & Geology

2007-06-30 15:40:55 · 2 answers · asked by jeheil 1 in Engineering

what is the pH of 500mL of soln. containing 0.0124 gram of Ca(OH)2.

If anyone can help me set this up that would be great!

2007-06-30 15:34:20 · 3 answers · asked by Anonymous in Chemistry

2007-06-30 15:33:08 · 3 answers · asked by simply_me 3 in Biology

This may be a dumb question, but if the supernova remnant (the Crab Nebula, for example, which is theorized to be the remnant of a star that was recorded as having been witnessed exploding in 1054 A.D.) was once one star, then how can many stars form and continue forming from the remaining material (not even all of the material) of the one original star?

2007-06-30 15:29:47 · 8 answers · asked by Brian K 1 in Astronomy & Space

I would like to know which one of these involves more mathematics. Always been asking myself that question.
I always thought it was Civil engineering, but I'd like to know if I'm right, please explain me how they differ, in other ways other than mathematics. The articles I've read before haven't satisfied me enough.

2007-06-30 15:24:59 · 6 answers · asked by Arc 2 in Engineering

2007-06-30 15:24:08 · 4 answers · asked by simply_me 3 in Biology

2007-06-30 15:21:40 · 5 answers · asked by simply_me 3 in Biology

Is there a subtle force coming from the center of the galaxy that could throw our earth out of wack?

2007-06-30 15:19:51 · 14 answers · asked by sunscour 4 in Astronomy & Space

On earth?

2007-06-30 15:15:00 · 23 answers · asked by Life goes on... 6 in Astronomy & Space

One of my friends found this and was wondering what it was and I have no clue. I have two pictures of the insect in question and they were taken in a coastal town in Connecticut.

http://photos-092.ll.facebook.com/photos-ll-sf2p/v78/13/40/1083900092/n1083900092_30100368_304.jpg

http://photos-092.ll.facebook.com/photos-ll-sf2p/v78/13/40/1083900092/n1083900092_30100367_9605.jpg

Any help would be greatly appreciated.

2007-06-30 15:12:35 · 5 answers · asked by Chris 3 in Zoology

I asked this question before but it was removed for some reason and I didn't get an answer. Does anyone know a simple formula for converting celsius to farenheight?

2007-06-30 15:08:24 · 14 answers · asked by brian 2 in Other - Science

ITEMS:
Adige River
Adriatic Sea
Aegean Sea
Afafura Sea
Akagera River
Alazani River
Alboran Sea
Allegheny River
Altamaha River
Amazon River
Amu Darya River
Amur River
Andaman Sea
Arabian Sea
Aral Sea
Aras River (Armenia)
Aras River

The description should be at least 200 words long but can also be much longer. I need someone to find information on each of the items on the Internet, or other sources.
Please help me. Thanks

2007-06-30 15:06:28 · 3 answers · asked by Anonymous in Earth Sciences & Geology

Calculate the pH of a soln of acetic acid that is 3% ionized, Ka = 1.8 x 10^-5.

Ok, thanks to the help from a very kind person, I realized what I needed to. But now, Im getting the wrong answer over and over again. I get 3.13. But thats not one of the options I have for the answers. If anyone could help me out I would appricate it.

2007-06-30 15:03:27 · 3 answers · asked by Anonymous in Chemistry

2007-06-30 15:00:24 · 8 answers · asked by MAN OF STEEL, 1 in Weather

2007-06-30 14:59:48 · 12 answers · asked by Anonymous in Paranormal Phenomena

does anyone know if we already have digital equipment in modern cinemas (for the picture i mean) or do we still watch Film material along with digitalized sound ?

just curious, never seen modern projectors so far

2007-06-30 14:46:39 · 3 answers · asked by blondnirvana 5 in Engineering

My doctor knows I drink on occasion, yet when he prescribed me the depakote, he never mentioned that it was dangerous to have a few beers while taking it. I dont know if it slipped his mind, or if it wasnt a factor. Anyways, just courious what you would think....Is it relativly safe to have a few beers a few hours before I take my bedtime 250mg depakote?

2007-06-30 14:44:30 · 4 answers · asked by Anonymous in Medicine

2007-06-30 14:42:17 · 8 answers · asked by that ghost. 1 in Physics

I just need a little hint for this, I would like to be able to figure it out myself.

Calculate the pH of a soln of acetic acid that is 3% ionized, Ka = 1.8 x 10^-5.

Since I don't have M of the solution, I can't solve by
% ionization = [H+}Equil / [HA]i

please help me understand what approach to take. Thank you in advance.

2007-06-30 14:41:31 · 2 answers · asked by Anonymous in Chemistry

I'm just curious but i'm not good at visualizing this kind of stuff.

2007-06-30 14:41:21 · 10 answers · asked by Anonymous in Astronomy & Space

Everyone knows that global warming is a big world issue. I wanted to know how I could calculate my familys' carbon footprint.

2007-06-30 14:30:14 · 2 answers · asked by niners1800 2 in Earth Sciences & Geology

I ordered one on-line already, but I don't want to wait for it. What are some big chain places that carry telescopes. Best Buy? Radio Shack? Ritz Camera? Where?

2007-06-30 14:28:03 · 7 answers · asked by marisascool 1 in Astronomy & Space

2007-06-30 14:27:29 · 4 answers · asked by Akilesh - Internet Undertaker 7 in Chemistry

Science doesn't enter discussion about intelligent design, or astrology simply because there's no real evidence to say it's real...so doesn't that implicitly mean there's no god? (else science would explore it as it does everything else it can show evidence to be real)

2007-06-30 14:18:42 · 12 answers · asked by stonerosedesigndotcom 3 in Other - Science

if you dont know of any dont answer this question

2007-06-30 14:12:49 · 13 answers · asked by Anonymous in Astronomy & Space