Science & Mathematics - 14 December 2006

Many natural numbers can be written as the sum of consecutive numbers. here are some examples:
10 = 1+2+3+4
33 = 16+17

18 = 5+6+7
75 = 13+14+15+16+17
We might use inductive reasoning to conclude that every natural number can be written as the sum of consecutive numbers. Find a counterexample to show that this is not true.

2006-12-14 08:29:54 · 3 answers · asked by mochaspice16 1 in Mathematics

2006-12-14 08:27:54 · 4 answers · asked by Anonymous in Astronomy & Space

For example, there are healthy people with no arms and no legs. Are there people who have survived for any long duration with just a head, heart, and a few other essential organs?

2006-12-14 08:24:02 · 6 answers · asked by cmsb705 5 in Medicine

2006-12-14 08:23:53 · 0 answers · asked by Anonymous in Chemistry

It must be computer generated. But some are cleverer than others (and make more money at it - eg the guy in The Daily Telegraph). Is it simply the reverse of solving a sudoku, encoded? (Fiendish is no problem with logic.) Or is it more sophisticated than that?

2006-12-14 08:23:50 · 2 answers · asked by cb 1 in Mathematics

I'm too lazy to work it out for myself! With an average walking speed of 4 mph?

2006-12-14 08:23:39 · 5 answers · asked by bignumbersconfuseme 1 in Astronomy & Space

i need to know how amy for this project. i don't kneed to know exactly, just apporoximantley how many rings. and please don't exxagerate! i h8 it when ppl do that!

2006-12-14 08:19:52 · 7 answers · asked by Anonymous in Astronomy & Space

2006-12-14 08:19:19 · 26 answers · asked by dsw 2 in Physics

2006-12-14 08:19:12 · 2 answers · asked by Rich 1 in Chemistry

2006-12-14 08:15:14 · 1 answers · asked by Anonymous in Mathematics

aeroplanes out of the same material as the black box recorder, that never gets damaged???

2006-12-14 08:14:04 · 12 answers · asked by ? 4 in Engineering

I need to find three integers a, b, and c, such that the cube of their sum is equal to their product, for example:

(a+b+c)^3=abc?

2006-12-14 08:12:23 · 3 answers · asked by Anonymous in Mathematics

A 7 gram sample of a hydrated salt is heated over a bunsen burner until its mass drops to a constant 4.58 grams.

1. What is the percent by mass of water in the original sample.

2. If the formula for the anhydrous salt is ZnCl2, what is the formula for the hydrated salt?

2006-12-14 08:12:09 · 4 answers · asked by Aida 1 in Earth Sciences & Geology

2006-12-14 08:11:14 · 4 answers · asked by clinton12300 1 in Physics

I know solar power needs sunlight to work but can you use lightbulb light?

2006-12-14 08:11:12 · 5 answers · asked by Small Fry 5 in Other - Science

Unlike science fair volcanoes, real volcanoes realease many dangerous gases. One of the gases released is sulfur dioxide, which is a major component of acid rain. In order to remove sulfur dioxide from the atmosphere, government clean-up programs combine it with calcium oxide to form calcium sulfite, a much safer compound.

Here is the balanced equation:
SO2CaO --> CaSO3

Here are the questions:
1. How many molecules of sulfur dioxide can be neutralized using 3 kilograms of calcium oxide?


2. How many liters of sulfur dioxide gas are neutralized in Question 3? (assume STP)

2006-12-14 08:09:25 · 1 answers · asked by Aida 1 in Earth Sciences & Geology

2006-12-14 08:07:36 · 6 answers · asked by janet n 1 in Physics

What is the formula name of : BaCrO4, BbS2, Li2S, Cs2S?

2006-12-14 08:07:09 · 2 answers · asked by Khanh Ngan D 1 in Chemistry

2006-12-14 08:06:18 · 4 answers · asked by suniti 2 in Mathematics

there is a given graph that has a curve going from (0,1) to (10,7). the curve is concave down, like half a smile :P i dont know how else to explain it. im not sure if this helps thank u

2006-12-14 08:06:07 · 2 answers · asked by E.T.01 5 in Mathematics

2006-12-14 08:05:55 · 2 answers · asked by zeugy2nice 1 in Mathematics

2006-12-14 08:04:22 · 3 answers · asked by Dan W 1 in Chemistry

I have this project due in my earth science class and i was wondering if anyone knows any websites or information on the comets halley and hale-bopp...i need like statistical data,historical info and interesting info..well thnxs anyways

2006-12-14 08:03:20 · 3 answers · asked by tabby 2 in Earth Sciences & Geology

2006-12-14 08:03:01 · 4 answers · asked by bunny 2 in Earth Sciences & Geology

2006-12-14 07:59:20 · 8 answers · asked by Anonymous in Chemistry

2006-12-14 07:58:29 · 7 answers · asked by Magzilla 2 in Mathematics

hmmmmm

2006-12-14 07:58:13 · 35 answers · asked by Anonymous in Mathematics

how many silver atoms are in 0.5 moles of silver? (^ = exponent)
1) 6.0 x 10^ 23 atoms
2) 6.0 x 10^ -24 atoms
3) 3.0 x 10^ 23 atoms
4) 2.1 x 10^ 24 atoms

2006-12-14 07:55:45 · 5 answers · asked by HARRY K 1 in Chemistry

2006-12-14 07:55:29 · 12 answers · asked by Anonymous in Mathematics

Hey, can you complete these sentences?

1.) Genes that are located on the sex chromosomes are said to be______.
2.) Crossing-over produces_____, or individuals with new combinations of genes.
3.)The ________states that genes are located on chromosomes.
4.) _______,"packages" of genes that always tend to be inherited toghether, correspond to chromosomes.
5.) The fact that the distance between two genes determines how often crossing-over occures between them is the basis for_____.
6.)_______ are chromosomes that are different in males and females.
7.) Chromosomes that are the same in both males and females are known as_____.
8.) _______, which are located on the same chromosome, do not undergo independent assortment.
9.) If we consider just the sex chromosomes, a normal female human or fruit fly is represented as ____, whereas a normal male is represented as _____.

Thanks to those who can help me out.

2006-12-14 07:53:46 · 1 answers · asked by Hank Ferris 2 in Biology