Science & Mathematics - 21 September 2006

I have discovered a higher level of this subject and each day find out more and more. So the thought is since a vacuum in a balloon will easily float better then helium if it is sustained then will it be able to sustain with a resistance ring? A vacuum evacuates too quickly because the weight of air is dominant and causes pressure to the container of the vacuum so it shrivels up. But would a container of vacuum inside a container of helium be able to sustain enough resistance long enough for them to react to lift?

2006-09-21 18:44:35 · 3 answers · asked by SRK 1 in Physics

2006-09-21 18:38:41 · 4 answers · asked by Anonymous in Astronomy & Space

The rate of water usage for a business, in gallons per hour, is given by
W(t)=25te^(-t), where t is the number of hours since midnight. Find the average rate of water usage over the interval 0 is less than or equal to t and t is less than or equal to 6.

2006-09-21 18:36:22 · 4 answers · asked by Rocky 1 1 in Mathematics

2006-09-21 18:36:06 · 10 answers · asked by Anonymous in Chemistry

2006-09-21 18:35:26 · 7 answers · asked by spaz2k219090 2 in Mathematics

I found the length and width of a paramecium using a microscope with a reticle and micrometer. Now I'm asked to find the volume of the paramecium using my measurements. The directions say to calculate the volume by selecting a formula for some regular shape that corresponds to the paramecium and, using the volume formula for that shape, find the volume of the paramecium. How do you find the volume of any shape without the height? I've thought of only one volume formula that doesn't use height(volume of a circle), but the problem with that one is that I don't know what to use as the radius. Help!

2006-09-21 18:35:23 · 2 answers · asked by Anonymous in Biology

Three footballs and one soccer ball cost $155. Two footballs and three soccer balls cost $220. Determine the cost of one football and the cost of one soccer ball.

2006-09-21 18:28:31 · 3 answers · asked by Lana 1 in Mathematics

There seems to be an epidemic in my part of Sussex. Not seen it before, or I may have overlooked occasional cases, but this year there are lots. Burrowing rabbits mainly, but not all.

2006-09-21 18:28:14 · 10 answers · asked by Perseus 3 in Zoology

2006-09-21 18:26:33 · 8 answers · asked by skizars 1 in Other - Science

A football stadium has 20000 seats between the goal lines and 5000 in the end zones. An end-zone seat is $5 cheaper than one between the goal lines. For one game, the revenue when all seats were sold was $350000. What is the cost of each type of seat?

2006-09-21 18:24:57 · 3 answers · asked by Lana 1 in Mathematics

F(x)=
cx^2+8x if x<3
x^3-cx if x >or= 3

2006-09-21 18:21:10 · 3 answers · asked by Anonymous in Mathematics

Pharmacy related term

2006-09-21 18:20:04 · 2 answers · asked by Namit 1 in Medicine

A sports club charges an initiation fee and a monthly fee. At the end of 5 months, a member had paid a total of $170. At the end of 10 months, she had paid a total of $295.What is the initiation fee?

2006-09-21 18:19:26 · 2 answers · asked by Lana 1 in Mathematics

mabey the confusing part is just my font, i need to fix that

2006-09-21 18:17:45 · 8 answers · asked by Anonymous in Mathematics

2006-09-21 18:16:36 · 11 answers · asked by Pradyumn 1 in Astronomy & Space

Actually the original problem is "Prove that the union of finitely many compact subsets is compact." I have shown that the union is closed. What is left is to show that it is bounded so that I can conclude that the union is indeed compact.

2006-09-21 18:15:53 · 4 answers · asked by Anonymous in Mathematics

1.when i read the book, i can remember everything,but when i take the test, i don't know anything.
2.can someone tell me some good ideas about how to study biology.i got C in my last test,it makes me feel so sad.
thanks

2006-09-21 18:07:09 · 16 answers · asked by kristymia 1 in Biology

2006-09-21 18:03:24 · 11 answers · asked by officerdelhi 1 in Engineering

if you have to sneeze and you look at the sun or a bright light it makes you sneeze right away? ive always wondered that. so all you educated people out there give me an answer plzz.

2006-09-21 18:00:07 · 14 answers · asked by imalickyouallover69 5 in Other - Science

2006-09-21 17:54:10 · 11 answers · asked by Anonymous in Physics

2006-09-21 17:52:00 · 3 answers · asked by Anonymous in Chemistry

Thanks!

2006-09-21 17:51:36 · 3 answers · asked by Kay Anne D 1 in Physics

2006-09-21 17:51:06 · 3 answers · asked by landshark 1 in Mathematics

They've been in cahoots with Hollywood in faking their "space explorations" for some time now. Well at least since April 12, 1961, when Yuri Gagarin CLAIMED to have gone into space. Frankly, I don't think ANYONE has been to space much-less the moon. When do both NASA and the Russians plan to stop the charades?

And I don't care what any of you say.. we've never been to the moon OR SPACE! Bunch of gullible people... it's amazing how people will believe anything.

2006-09-21 17:47:55 · 20 answers · asked by Anonymous in Astronomy & Space

any websites that will help with pre-calculus from "my" book

2006-09-21 17:46:41 · 5 answers · asked by Anonymous in Mathematics

2006-09-21 17:44:57 · 7 answers · asked by prettiful! 1 in Earth Sciences & Geology

2006-09-21 17:44:24 · 4 answers · asked by kristymia 1 in Biology

2006-09-21 17:42:15 · 18 answers · asked by Anonymous in Geography

Letter strings are formed by choosing four of the six letters in the word YEOUCH and arranging them in order. How many such letter strings end with the letters Y and E (in either order) ?

I know the answer is 24, but I hoped somebody could explain it, thanks.

2006-09-21 17:41:30 · 6 answers · asked by J R 2 in Mathematics

2006-09-21 17:40:39 · 7 answers · asked by vortex 3 in Biology