Science & Mathematics - 27 December 2006

A landscape architect is creating a rectangular rose graden to be located in a local park. the rose garden is to have an area of 60m^2 and be surrounded by a lawn. the surrounding lawn is to 10 m wide on the nothe and south sides of the garden and 3 on the east and west side. Find the dimensions of the rose garden if the total area of the garden and lawn together is to be a minimum

2006-12-27 17:28:19 · 3 answers · asked by up_riser 1 in Mathematics

2006-12-27 17:28:01 · 1 answers · asked by mike e 1 in Engineering

2006-12-27 17:25:36 · 8 answers · asked by Anonymous in Astronomy & Space

2006-12-27 17:23:45 · 2 answers · asked by MVK 1 in Physics

10. d

The 1st ionization enery for Mg is 738 kilojoules per mole and that Al is 578 kilojoules per more ?
account for this difference

2006-12-27 17:16:00 · 2 answers · asked by chanti 3 in Chemistry

Is this true for all types of batteries ?

2006-12-27 17:11:34 · 5 answers · asked by pax veritas 4 in Engineering

find two concecutive numbers such that one-forth of the smaller number is three more than one-fifth of the bigger number

2006-12-27 17:09:16 · 10 answers · asked by emz 1 in Mathematics

2006-12-27 17:02:14 · 7 answers · asked by boy 1 in Biology

I'm a junior in high school, and I have started to think about what I should become in the future. Also, I'm starting to look into different colleges and majors. First of all, I want to say that I LOVE chemistry. period. I can't really point out which part of it I like, but I like it better than biology and physics. I am so confused on what major I would like to do at college. I was considering Pharmacy, but it seemed like Chemical Engineering would be so much more fun. I know that both will lead to high-salary careers, which is somewhat important to me. I know money should not be a key deciding factor, but I might as well choose a chemistry-major that leads to high-salary careers. Which major/career would be more fun and has more room for advancement? Are there other majors/careers I should consider? Also, is the workload for Chemical Engineering as bad as other people on this site have said to be?

2006-12-27 17:02:10 · 5 answers · asked by feelthebass10 1 in Chemistry

a) explain the difference between Ca and K in regard to
i) their first ionization energies
ii) their second ionization energies


K: 1st ionization energy =419 2nd: 3050
Ca: 1st ion. enery = 590 2nd: 1140

2006-12-27 17:02:04 · 3 answers · asked by chanti 3 in Chemistry

Please tell me as much as you can as I am doing a project. Please also give me the picture if you can.

2006-12-27 16:59:39 · 7 answers · asked by secret_diary_girl 1 in Botany

2006-12-27 16:58:08 · 12 answers · asked by david b 1 in Chemistry

Why does replication occur on both strands of DNA, but transcription occur only on one strand? Why not just replicate using one strand of DNA to produce one new helix rather than two new helices, or why not take a okazaki - fragment - type approach to transcription and use the complimentary strand?

2006-12-27 16:57:30 · 2 answers · asked by need help! 3 in Biology

2006-12-27 16:53:37 · 12 answers · asked by Anonymous in Astronomy & Space

what if your red is my purple? i cannot think of a way to prove or disprove this, and please don't respond about color blindness, that is not what i mean. thanks =]

2006-12-27 16:51:10 · 15 answers · asked by Kait 1 in Medicine

I think it might be polar, since it pulls dirt molecules away from stuff, but I'm not very sure.

2006-12-27 16:49:44 · 5 answers · asked by Anonymous in Chemistry

2006-12-27 16:47:05 · 1 answers · asked by shelly 2 in Other - Science

Account for the existence of several series of lines in the spectrum.

2006-12-27 16:44:57 · 2 answers · asked by chanti 3 in Chemistry

2006-12-27 16:39:32 · 7 answers · asked by ALERT! 1 in Mathematics

its this related rate problem and i don't know how to do it because it has two variables and i don't know if I am thinking about it properly. i also don't know if i;m applying the given information right... please help =(
here's the question:

A conical tank (with vertex down) is 10 feet across the top and 12 feet deep. If the water is flowing into the tank at the rate of 10 cubic feet per minute, find the rate of chnage of the depth of the water the instant it is 8 feet deep.

this is what I have done:
Given: (dV/dt)= 10
Find: (dh/dt) when h=8 (i think h=dept)

and since V= 1/3 r^2 h pi (the Greek letter)
then it would be (dV/dt)= 2/3 pi r dr/dt h dh/dt

but then how do you find dr/dt and then how do I apply that the top is 10 feet across and that the conical tank is 12 feet deep????

thank you so much for helping =)

2006-12-27 16:38:29 · 4 answers · asked by principessa=o) 2 in Mathematics

2006-12-27 16:37:31 · 1 answers · asked by Anonymous in Biology

i'm convinced that virgin birth happens in some species of lizards-but can it occur to human female? any proof?

2006-12-27 16:30:44 · 6 answers · asked by wftxrabbit 2 in Biology

2006-12-27 16:29:19 · 13 answers · asked by Peanut Butter 5 in Weather

engg detail

2006-12-27 16:28:46 · 5 answers · asked by prbakaran l 1 in Engineering

Just wondering. A science question that popped into my head =)

2006-12-27 16:25:02 · 10 answers · asked by Anonymous in Earth Sciences & Geology

2006-12-27 16:24:13 · 14 answers · asked by Anonymous in Earth Sciences & Geology

does that mean that earth is weightless in space do to the fact that there is no gravity other that the suns.

2006-12-27 16:23:53 · 7 answers · asked by Anonymous in Astronomy & Space

2006-12-27 16:22:21 · 11 answers · asked by Da_wa 1 in Earth Sciences & Geology

2006-12-27 16:18:54 · 5 answers · asked by Anonymous in Earth Sciences & Geology

2006-12-27 16:17:11 · 6 answers · asked by Anonymous in Earth Sciences & Geology