Science & Mathematics - 22 September 2007

Use the integral test to determine whether the series is convergent or divergent:

1) summation notation symbol (with n=1 on bottom and infinity on top) of 1/ 4th square root of n

2) summation notation symbol (with n=1 on bottom and infinity on top) of 1/n^4

show steps plz

2007-09-22 10:28:55 · 2 answers · asked by Anonymous in Mathematics

2007-09-22 10:28:54 · 3 answers · asked by Anonymous in Earth Sciences & Geology

Why is it papers print whatever crap they like and the public (most of them) believe it?

This latest milk scandal is really annoying me. The supermarkets and processing units have found to be allegedley overcharging the public at least 20p per litre. Great, about time they were stopped.

But what really pissed me off is that the newspapers then went on to say so are the farmers!!!! - they state that it costs the farmer, 4p per litre to produce milk and we sell it for 14p - does it hell, it costs between 12 - 15p per litre !!! and that is truthfully - we are lucky as we are on a good contract and can achieve around 19 - 22p per litre - which keeps us afloat!!!

Rant over, thankyou!!

2007-09-22 10:27:23 · 5 answers · asked by nickynoodles33 4 in Agriculture

a.) melted
b.) sublimed
c.) evaporated
d.) vaporized

2007-09-22 10:27:03 · 6 answers · asked by Anonymous in Chemistry

Sketch the region and find its area (if the area is finite)

S = { (x,y) / x > or equal to -2, 0 < or equal to y < or equal to e^(-x/2) }

Use the Comparison Theorem to determine whether the integral is divergent or convergent.

integral from 1 to infinity of (x/ sqrt (1 + x^6) dx

2007-09-22 10:26:10 · 2 answers · asked by bdgurl5388 1 in Mathematics

Find the values of "x" for which the series converges. Find the sum of the series for those values of "x".

1) summation notation symbol (with n=1 on bottom and infinity on top) of x^n/3^n

2) summation notation symbol (with n=0 on bottom and infinity on top) of cos^nx/2^n

show steps so i know how u did it..thanks

2007-09-22 10:25:20 · 1 answers · asked by Anonymous in Mathematics

Can u please help me with this question because it seems that i can't find the answer.
What type of macromolecules do they belong to:
-NaCI
-estrogen/testosterone
-glucose
-cholestrol
-collagen
-glycogen
-steriod
-polysaccharide
-salt
-protein
-monosaccharide
Thanks for the help!!

2007-09-22 10:23:38 · 1 answers · asked by IvK*JH 2 in Chemistry

At A-level how do you write electronic configuration?

2007-09-22 10:17:03 · 2 answers · asked by nothingspecial 1 in Chemistry

I would prefer an adult tiger, but a panther might work as well.

2007-09-22 10:14:42 · 3 answers · asked by marcuschizm 1 in Zoology

2007-09-22 10:14:23 · 2 answers · asked by   4 in Physics

Let us think about that for a minute or so. It must have taken a lot energy for that to have happenned. this is really more than one question. what made everything come together? why didn't the particules continue going far apart. If gravity was strong enough to stop it than won't it been strong enough to stop it before it even got started?

2007-09-22 10:13:44 · 4 answers · asked by Anonymous in Physics

2007-09-22 10:11:14 · 4 answers · asked by amcheung10 2 in Biology

Two forces, 381N at 8deg. & 307N at 25deg. are applied to a car in an effort to accelerate it.?
What is the magnitude of the resultant of
these two forces?

What is the direction of the resultant force (in re-
lation to forward, with counterclockwise con-
sidered positive)?????
within the
limits of -180deg to 180deg

2007-09-22 10:08:19 · 3 answers · asked by ? 1 in Physics

I know that the more current that flows the hotter something will get, but a loose connection would generate more resistance thus limiting current flow. So why would a loose connection generate heat if there is now less current flowing?

2007-09-22 10:06:59 · 9 answers · asked by Matt F 1 in Engineering

I'm just starting Physics this year. We have a lab where we collected data of a falling object.

Here is my graph of displacement vs time squared.
http://i5.photobucket.com/albums/y182/luvlaws/graph.gif?t=1190494426 (Ignore the black 'best fit' line).

I'm trying to figure out "what the shape of the graph indicates" and "the significance of the slope of the graph".

I've never come across a graph with time squared before.

My answer is that the falling object accelerates downwards until it hits the velocity -9.8 m/s (gravity)? So the curve in the beginning is the acceleration; the rest of the graph is more straight, meaning constant velocity as the object falls?

Is this right?
Thanks a ton if you can help.

2007-09-22 10:06:36 · 4 answers · asked by Paul 3 in Physics

I have CH3C=OSH and H2C=S=O=CH2...I wish I could draw the structures on here, but I'll leave that up to you upon checking. thanks!

2007-09-22 10:05:47 · 1 answers · asked by Jimmy 3 in Chemistry

For a science olympiad competition? And I don't mean beans in a container, or paper over a comb, or wine glasses. And guitars are too common. I want to do something different. I've been looking up how to make flutes and panpipes and vegetable instruments. Do you think vegetables will be allowed in the competition? Just gimme all ur ideas. Thanx. ^^

2007-09-22 10:01:08 · 3 answers · asked by Anonymous in Other - Science

the annual health care cost for each employee is $7800.00.you pay 50%of this and get paid monthly.ehat is deducted from your paycheck? a)3.25 b)32.50 c)3250.00
d)325.00

2007-09-22 10:00:46 · 3 answers · asked by consumer math help me 1 in Mathematics

Arlene is to walk across a high wire strung horizontally between two buildings 13.0 m apart. The sag in the rope when she is at the midpoint is 10.0°. If her mass is 58.0 kg, what is the tension in the rope at this point?.....N

2007-09-22 09:50:31 · 3 answers · asked by Nikita 1 in Physics

An unknown compound contains only carbon, hydrogen, and oxygen (CxHyOz). Combustion of 7.00 g of this compound produced 10.3 g of carbon dioxide and 4.20 g of water.

How many moles of carbon, C, were in the orginal sample?

2007-09-22 09:49:37 · 1 answers · asked by Cynthia P 1 in Chemistry

Let's say that I observe Jupiter's moons through a telescope 3 nights in a row. After each viewing I sketch what I saw. What I have is Jupiter and four other dots plotted on a piece of paper for every night. Is there any way to tell which dot on my first sketch is the same dot on my second and third sketch?
I'm trying to determine the orbital periods of the moons, WITHOUT any aids. Of course, I COULD just look up the positions of the moons on the internet, but let's assume this is not an option.

2007-09-22 09:49:29 · 3 answers · asked by lenny_talarico 2 in Astronomy & Space

apart from having the compound? just curious :) .... (don't need to go into detail)

2007-09-22 09:46:12 · 1 answers · asked by sathi 2 in Chemistry

2007-09-22 09:41:23 · 3 answers · asked by bert 1 in Astronomy & Space

2007-09-22 09:38:09 · 4 answers · asked by Updated Life th13f 2 in Chemistry

i know the atomic number is the number of protons, but how do you find out how many neutrons and electrons in it?

2007-09-22 09:31:27 · 2 answers · asked by kpajamas613 3 in Chemistry

The Brown paper one, and the one where Sudan IV reagent is added...but what is the advantage? Thanks alot guys.
There is a similar question in the archives but wanted to see what others have to say. Thanks a bunch.

2007-09-22 09:22:39 · 1 answers · asked by Anonymous in Chemistry

this is an ion concentration problem
M stands for molarity

2007-09-22 09:18:15 · 1 answers · asked by Anonymous in Chemistry

2007-09-22 09:11:55 · 19 answers · asked by ted 1 in Biology

2007-09-22 09:10:36 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-22 09:10:05 · 3 answers · asked by Anonymous in Chemistry