Science & Mathematics - 9 August 2007

when put together? like maybe CO3 and NaOH? Please provide the chemical sentence. Also, how can you test whether the nature of a liquid is alkaline? Any experiments? thank u

2007-08-09 23:29:16 · 2 answers · asked by Lady Fish 3 in Chemistry

2007-08-09 23:19:18 · 4 answers · asked by francescards 1 in Zoology

I'm new to the physics course, and these examples are in my text book, but the answers are not given, I'm pretty lost!


An object moves along the x-axis according to x(t) = (300t² - 2.00t + 3.00)m
Determine:
(a) the average speed between t =2.00 s and t = 3.00 s,

(b) the instantaneous speed at t = 2.00 s and t = 3.00 s,

(c) the average acceleration between t = 2.00 s and t = 3.00 s

(d) the instantaneous acceleration at t = 2.00 s
and t = 3.00 s.

Thanks in advance!

2007-08-09 22:58:00 · 1 answers · asked by Sarah W 1 in Physics

I live by a cemetery well i have a story to telll you it doesnt bother me it just creeps me out, well i am a night owl and on occasion when i am in my basement watching tv sometimes only at night i see blue flashes of light flash out of a door witch is the tool area. what i wanna know is first have you ever heard of this before and 2nd do you have andy idea what it is , Me and my girl frend are the only ones to have seen it i some times look at her when we are watching the telly and see the blue flash accross her face... umm and oh one more thing i know it is not lighting even though it looks like a flash of blue it is not by anymeans lightning colored if that makes any sence ..... any ideas? . I also slowly with courage walk to the door and seee nothing it seems to flash a last time before i get to the door... i wonder there is alot of electrisitylines and i do live next to a cemetary .... does that have something to do with it? well answer me as best as you can answer decently pleez

2007-08-09 22:32:57 · 9 answers · asked by Matt W 1 in Paranormal Phenomena

mobile magnetic field device for military armorment to create a perimater to disrupt transmitter reciever style detenators(i.e.d.s)

2007-08-09 22:29:19 · 2 answers · asked by kjberard 1 in Engineering

and example, it's you who's chosen to travel. The time machine works by beating the light speed.
What would you see in the future? LOGICALLY, not your imaginary. because logically, the future hasn't formed yet. so if you travel to a place where hasn't formed, what would you see then?
do you get what i mean??
i'm not wishing for dumb answers.. so please answer me seriously...

2007-08-09 22:23:42 · 18 answers · asked by Anonymous in Astronomy & Space

2007-08-09 22:23:02 · 5 answers · asked by Rawwr* 3 in Chemistry

2007-08-09 22:22:47 · 4 answers · asked by Anonymous in Earth Sciences & Geology

I live by a cemetery well i have a story to telll you it doesnt bother me it just creeps me out kinda well i am a night owl and on occasion when i am in my basement watching tv sometimes only at night i see blue flashes of light flash out of a door witch is the tool area.

what i wanna know is first have you ever heard of this before and 2nd do you have andy idea what it is , Me and my girl frend are the only ones to have seen it i some times look at her when we are watching the telly and see the blue flash accross her face... umm and oh one more thing i know it is not lighting even though it looks like a flash of blue it is not by anymeans lightning colored if that makes any sence ..... any ideas?
P.s. I also slowly with courage walk to the door and seee nothing it seems to flash a last time before i get to the door... i wonder there is alot of electrisitylines and i do live next to a cemetary .... does that have something to do with it? well answer me as best as you can

2007-08-09 22:19:37 · 7 answers · asked by Matt W 1 in Paranormal Phenomena

They are things that really scare like I can't wake up am I allergic or does ibeuprofen cause nightmares? Does anyone else have this problem

2007-08-09 22:09:32 · 5 answers · asked by Anonymous in Medicine

2007-08-09 21:59:32 · 0 answers · asked by deepak_8584 1 in Engineering

C.PROPERTIES
1.Uncork one test tube of oxygen and then insert a glowing splint. Observe.
2.Place a small amount of sulfur in the deflagrating spoon. Ignite the sulfur and immediately tilt it into a test tube of oxygen. Take note of the odor of the gas produced and add 5mL of water into the test tube.Shake and test the solution with blue and red litmus paper.Observe.
2.Ignite one end of a strip of magnesium ribbon and immediately drop it into a test tube of oxygen. Cool the tube and add 5mL of water shake the mixture thoroughly and test with litmus paper. Observe.

Questions:
1.Describe the physical properties of oxygen.
2.(For procedure no.1 of PROPERTIES)
Does the splinter continue burning in the tube? Why?
What can you say about the relative density of oxygen?
3.(For procedure no.2 of PROPERTIES)
What was formed when sulfur was heated?
What is the equation?
What solution is formed after adding H20(water)?
What is the equation?
(next questions to the next post...)

2007-08-09 21:49:27 · 4 answers · asked by jmar 1 in Chemistry

2007-08-09 21:46:25 · 14 answers · asked by Anonymous in Mathematics

2007-08-09 21:36:54 · 9 answers · asked by Anonymous in Astronomy & Space

2007-08-09 21:34:05 · 17 answers · asked by tarquinn j 1 in Astronomy & Space

Hello,
is the following statement true or not ? (not the grammer)

"the energy transfer between a system and the surrendings can only be done by heat, work and mass transfer"...

if I say this, can someone exploit with the question of what if ...?

thanks...

2007-08-09 21:24:51 · 2 answers · asked by Enis T 2 in Physics

1. Find the 5th and 6th no. in this sequence.

2. How many no.s are there in this sequence?

3. If this sequence continues,what is the number immediately after 2584/4181?

2007-08-09 21:24:44 · 7 answers · asked by Anonymous in Mathematics

Hi. i'm jamal, a villager in india. my village is located near the jungles where wild tigers live too. Generally, those tigers do not drift into human habitat, but once in a while a face to face meeting between unarmed human and full grown tiger occurs. The result of such meetings is mostly fatal for the villagers. Yesterday a wild tiger killed a 30 year old man who seemed to be lost and was searching for the way to village. My question is why did the tiger kill the man if he didn't want to eat him? i thought they kill only for food. And also how can such future tragedies be averted? advise would be appreciated.

2007-08-09 21:21:37 · 9 answers · asked by Anonymous in Zoology

2007-08-09 21:20:18 · 6 answers · asked by Anonymous in Mathematics

2007-08-09 21:15:15 · 8 answers · asked by Anonymous in Astronomy & Space

In 2002 it was all over the news we'd be hit by an asteroid that would destroy the earth in 14yrs time, then it was all hushed up. Was it discredited? Untrue? A mere smudge on the asteroidometer? Or is it still hurtling full force to earth but they'd better not say coz everyone'll go crazy running up credit card debts, stealing, having orgies etc because "THE ENDOF THE WORLD IS NIGH"...in another 11years....???

Does anyone remember or know? I remember clearly coz I was arranging my wedding and wondered if there was any point continuing!

2007-08-09 21:11:31 · 8 answers · asked by SEJ71 3 in Astronomy & Space

2007-08-09 20:48:54 · 6 answers · asked by jiexinneo 1 in Chemistry

2007-08-09 20:39:13 · 14 answers · asked by kjberard 1 in Astronomy & Space

2007-08-09 20:33:58 · 5 answers · asked by anand s 1 in Geography

2007-08-09 20:26:29 · 8 answers · asked by zue 1 in Biology

d^2y/dx^2 +2dy/dx - 8y =4

Thank you for any help.

2007-08-09 20:14:22 · 4 answers · asked by Anonymous in Mathematics

I found this about 5 1/2 feet underground in Oregon. I was using the metal detectors searching for meteorites and I came across this highly magnetic piece (only in certain spots). It's about 7 1/2" x 4 1/2" and weighs about 15lbs.

http://i189.photobucket.com/albums/z147/screenwr/Artifact012.jpg
http://i189.photobucket.com/albums/z147/screenwr/Artifact011.jpg
http://i189.photobucket.com/albums/z147/screenwr/Artifact010.jpg
http://i189.photobucket.com/albums/z147/screenwr/Artifact009.jpg
http://i189.photobucket.com/albums/z147/screenwr/Artifact008.jpg
http://i189.photobucket.com/albums/z147/screenwr/Artifact007.jpg
http://i189.photobucket.com/albums/z147/screenwr/Artifact006.jpg

2007-08-09 20:13:40 · 4 answers · asked by Anonymous in Earth Sciences & Geology

Explain how a mass spectrometer is used to determine the relative abundance of an isotope.

2007-08-09 20:04:13 · 4 answers · asked by Bballplayer 1 in Chemistry

2007-08-09 20:03:51 · 3 answers · asked by Pansy 4 in Medicine

What does the term hydration mean? Explain the energy involved including the terms hydration energy and lattice energy.

2007-08-09 20:03:40 · 1 answers · asked by Bballplayer 1 in Chemistry