Science & Mathematics - 20 November 2006

2006-11-20 06:30:16 · 18 answers · asked by sports g 1 in Biology

2006-11-20 06:29:23 · 2 answers · asked by MB 3 in Mathematics

1)The length of a rectangle is 3 feet more than twice the width. The perimeter is 36 feet. Find the length and width.

2)The perimeter of a rectangle is 72 cm. The width is 3 cm. less than half the length. Find the length and the width.

3)Salary +commision equals total earnings. Maria is paid $140 plus a commision of 20 percent on all sales over $300. What must her total sales be if she is to earn a total of $340?

2006-11-20 06:29:17 · 15 answers · asked by Dillon L 1 in Mathematics

2006-11-20 06:29:12 · 3 answers · asked by dmblover828 1 in Weather

2006-11-20 06:28:26 · 6 answers · asked by aykafrom190 1 in Geography

High school science project

2006-11-20 06:28:01 · 1 answers · asked by mike p 1 in Engineering

This is getting on my nerves- prove n>logn for all natural numbers by induction. I can do this, but you have to have log((n+1)/n)<1 which is generally true, but has to be verified for a particular base of logarithm. Anyone got a nice elegant proof of this?

2006-11-20 06:27:36 · 3 answers · asked by Anonymous in Mathematics

i need to know which of these dates are leap years

2006-11-20 06:26:59 · 8 answers · asked by lisa jayne 1 in Mathematics

2006-11-20 06:22:38 · 4 answers · asked by BRIGHT N 1 in Physics

2006-11-20 06:21:38 · 2 answers · asked by Ilooklikemyavatar..exactly 3 in Engineering

2006-11-20 06:20:41 · 1 answers · asked by Anonymous in Botany

Can anyone help with this - not sure if I'm doing it right! OK I need to give the 6 equations for the synthesis of hexamminenickel chloride and have been given the first and last ones. The first equation is
[Ni(H2O)6]2+ + NH3 <===> [Ni(H2O)5 NH3]2+ + H2O
(The arrow ment to be equilibrium arrow)

and the overall equation is;

[Ni(H2O)6]2+ + 6NH3 <===> [Ni(H2O)5 NH3]2+ + 6H2O

Am I right in thinking that each step would simply be as the first but with each step having one more molecule of NH3 and H2O each time e.g. step 2;

[Ni(H2O)6]2+ + 2NH3 <===> [Ni(H2O)5 NH3]2+ + 2H2O

and step 3;

[Ni(H2O)6]2+ + 3NH3 <===> [Ni(H2O)5 NH3]2+ + 3H2O

etc...


or am I doing it totally wrong! Any help would be very much appreciated as nothing in my textbook about it and it is for a lab tomorrow!!!

2006-11-20 06:20:35 · 1 answers · asked by Showaddywaddy 5 in Chemistry

2006-11-20 06:19:01 · 3 answers · asked by rokfairy 1 in Earth Sciences & Geology

if you can can you give me the names of it.... thanks

2006-11-20 06:18:26 · 3 answers · asked by shamrock_bhoy 1 in Engineering

2006-11-20 06:18:08 · 6 answers · asked by MB 3 in Mathematics

find the measure of an angle whose supplement is 2 times its complement.

supplement is 180
is <--> =
2 times = 2x
its complement =90?

is that what it means

if it is then that means

180 = 2x - 90? what there to solve? am i finding the supplement or a complement angle?

2006-11-20 06:16:18 · 4 answers · asked by blinded_by_you01 1 in Mathematics

also i have other questions...

2. Breifly explain why the number of electrons circling the nuclus determines the physical and chemical properties of the atom.

3. How is it possible that only 92 elements are found in the natural world but the are millions of different types of substances?

2006-11-20 06:15:13 · 3 answers · asked by i_heart_jonathan<3 1 in Chemistry

im doing a report, and i need to know everything about mountain formation!! please help me!!

2006-11-20 06:15:01 · 4 answers · asked by tangerine 1 in Earth Sciences & Geology

2006-11-20 06:14:12 · 4 answers · asked by MB 3 in Mathematics

2006-11-20 06:12:05 · 2 answers · asked by lisaholdaway@btinternet.com 1 in Biology

2006-11-20 06:11:59 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2006-11-20 06:10:44 · 11 answers · asked by Anonymous in Mathematics

2006-11-20 06:09:28 · 3 answers · asked by fanuc 1 in Engineering

2006-11-20 06:06:23 · 8 answers · asked by MB 3 in Mathematics

2006-11-20 06:03:45 · 9 answers · asked by jinu 1 in Botany

2006-11-20 06:03:21 · 14 answers · asked by luckyduckno1 1 in Astronomy & Space

2006-11-20 05:59:22 · 3 answers · asked by leigh w 1 in Physics

2006-11-20 05:59:10 · 2 answers · asked by anil 1 in Geography

how far can u. i can gleed 52 feet.

2006-11-20 05:50:01 · 3 answers · asked by Anonymous in Physics

Given a 2 pan weighing scales. You want to be able to weigh objects weighing 1 to 40kg in whole numbered kg units.
What is the minimum number of weights you need to have and what are they(hint think induction!)

And then if you can find this solution try and generalise the solution to weigh larger amounts(theres your induction again :D!)

2006-11-20 05:49:37 · 2 answers · asked by Anonymous in Mathematics