Science & Mathematics - 17 January 2007

2007-01-17 12:35:21 · 2 answers · asked by the pink baker 6 in Geography

2007-01-17 12:35:18 · 4 answers · asked by crayon43 1 in Medicine

I have to write a 3 page report on the CA aqueduct and I found a really good website with lots of info but it was on the LA Aqueduct. I can't find any good websites for the CA aqueduct besides wikipedia. So can anyone suggest any good websites?

2007-01-17 12:35:15 · 2 answers · asked by RayRay 2 in Geography

if i hold a steel rod that is 1 meter long with a knob on the end and i turn 360 degrees, the knob travels at X speed.
if i extend the rod to 10 meters and urn at the same speed, the knob travels at a faster velosity.
if i extend the rod to EG. 100 trilion miles, surley the knob at the end would break light speed???? or would the rod bend??? or physics would force me to turn at a slower speed???

2007-01-17 12:34:42 · 16 answers · asked by stevenhawkins2208 3 in Physics

2007-01-17 12:34:16 · 1 answers · asked by grumpycandy_0 1 in Botany

Simplify the following expression:

-12t + 8t

PLEASE ANYONE????

2007-01-17 12:34:05 · 9 answers · asked by Anonymous in Mathematics

2007-01-17 12:33:21 · 1 answers · asked by mo s 1 in Biology

please explain in "physics terms" such as pressure, molecules, ect. =]

2007-01-17 12:32:54 · 7 answers · asked by blah 3 in Physics

Southwest Asia!!

2007-01-17 12:32:32 · 3 answers · asked by Courtney =) 1 in Other - Alternative

tanh(x) = 1/2
How would I go about finding the values of the other hyperbolic functions at x, given this equation? Thanks

2007-01-17 12:31:32 · 2 answers · asked by AlaskaGirl 4 in Mathematics

2007-01-17 12:31:14 · 6 answers · asked by Meggg 1 in Mathematics

2007-01-17 12:30:12 · 3 answers · asked by HazyMary 1 in Mathematics

Could you tell me HOW and what the answers are for these? I want to know how because there are other problems like it.

A) the type of reaction that occurs
B) predict the products of the reaction
C) write a balanced chemical equation

aluminum metal + calcium phosphate ->

2007-01-17 12:29:42 · 2 answers · asked by Country Boy 3 in Chemistry

Please explain your answer

2007-01-17 12:29:25 · 6 answers · asked by davidosterberg1 6 in Mathematics

2007-01-17 12:29:09 · 7 answers · asked by Blah Blah Blah 2 in Mathematics

2007-01-17 12:28:54 · 7 answers · asked by crayon43 1 in Medicine

2007-01-17 12:28:46 · 7 answers · asked by abigail<3 1 in Mathematics

2007-01-17 12:28:15 · 5 answers · asked by kas 1 in Weather

help

2007-01-17 12:27:14 · 7 answers · asked by trent w 1 in Mathematics

A sugar
B matter
C carbon
D energy

2007-01-17 12:27:03 · 5 answers · asked by kimberly n 1 in Biology

Does that mean older or current bluetooth chips will go even faster than the 2.0 version of 3mbps? What about future bluetooth chips? Will they be blue-wb chips that can accept pure bluetooth signals and UWB super fast signals? Where does the compatibility start and end?

2007-01-17 12:25:28 · 1 answers · asked by Ilooklikemyavatar..exactly 3 in Engineering

A mass of ).497-g sulfamic acid, NH2SO3H, dissolved in 50.0 mL of water is neutralized by 28.4 mL of NaOH at the phenolphthalein endpoint. WHat is the molarity of the NaOH solution? the Formula weight of NH2SO3H is 97.1 g/mol: NH2SO3H + NaOH----->NH2SO3 -NA+ + H20

2007-01-17 12:25:22 · 3 answers · asked by help ^_^ 1 in Chemistry

Given 6 white LEDs wired in parallel, each with forward voltage of 3.3v and drawing 20mA, using (3) 150 ohm/0.25W resistors, how long before a typical 9v battery dies? How do I determine this in the future?

FWIW, the schematic I'm using is the one created by the LED wizard at: led.linear1.org/led.wiz .

+----|>|----|>|---/\/\/----+
+----|>|----|>|---/\/\/----+
+----|>|----|>|---/\/\/----+

This shows 2 LEDs + 1 resistor connected in series as a group. Each group is then connected in parallel with one another.

My goal is to light this array to in a way that it is optimized for brightness and long battery life. The choice of 9v power source isn't a requirement: 1.5v AAAs/C/D cells connected in series is also legitimate.

2007-01-17 12:23:17 · 3 answers · asked by lazyweb 1 in Engineering

A 0.981-gram sample of potassium hydrogen phthalate, KHC8H4O4, is dissolved in 100 mL of water. If 18.9 mL NaOH are required to reach the stoichiometric point, what is the molarity of the sodium hydroxide? the formula weight of KHC8H4O4 is 204.2 g/mol

2007-01-17 12:22:06 · 3 answers · asked by help ^_^ 1 in Chemistry

Can someone explain to me what a function is?

Also, which of the following is a function?
1) xy = 7
2) x = 7
3) x^2 - y^2 = 7
4) x^2 + y^2 = 7

I thought it was 2 because isn't a function "For every value of x, there is only one value of y" ? or is 7 not y?

2007-01-17 12:21:53 · 5 answers · asked by Anonymous in Mathematics

done a lab,mix zinc w/acid, got hydrogen then i put the hydrogen in tubes, tested em to see if theyre pure (if get a bark when u put a lighter to the tube, its not pure). need help answering these questions::__
Have a burning splint about 15 cm long ready to introduce into the bottle of hydrogen just after it's lifted, mouth down and held vertically, from the glass plate. Observe carefully as the burning splint is slowly inserted into the bottle of hydrogen. Watch the mouth of the bottle carefully, as the splint is slowly withdrawn from the bottle. Insert the splint a second time, & again withdraw it slowly. Observe the inside walls of the bottle
9.Will the splint bum in the atmosphere of hydrogen? Explain.
10.Where is combustion taking place? Explain.
11.What did you observe on the walls of the bottle? Explain
12.Why does a test tube of hydrogen mixed w/air Xplode/Bark while a test tube of pure hydrogen burns quietly?
13.)Balance: Zinc + Sulfuric Acid =
Hydrogen + Oxygen =

2007-01-17 12:21:00 · 3 answers · asked by truckin_90 2 in Chemistry

a. the center spindle that a compact disk fits around while in case.
b. the two ends of a shoe lace
c. the pull tabs on a soft-drink can
d. the correct letters used to replace errors in a document after they have been deleted in a word processor
e. the mechanism of a zipper that allows the separated parts to be joined
Pick the best that apllies. Multiple Choice Question

2007-01-17 12:19:36 · 4 answers · asked by iqbalkhanayesha 2 in Biology

Such as the Tunguska blast caused by a meteror or comet streaking across the Siberian sky?

2007-01-17 12:19:34 · 7 answers · asked by Scythian1950 7 in Astronomy & Space

please show work.

2007-01-17 12:18:49 · 3 answers · asked by huronda_hottie_2006 1 in Mathematics

sorry, but i really need the answer for hw. plz give any sites u can. gracias=]

2007-01-17 12:17:35 · 4 answers · asked by Mrs Joe Jonas ♥ 2 in Earth Sciences & Geology