Science & Mathematics - 10 October 2007

i have capsule filled with oil ( density 0.8 ) with atm.temp. initial pr. at the time of filling 1bar.final pr? when volume difference considered as 0.02684 cc & final temp of oil be supposed to increase by 1ºC..

2007-10-10 23:55:22 · 1 answers · asked by shailesh s 1 in Physics

what is 'space'? Isn't it the absence of matter and energy? (which are ultimately the same thing according to Einstein)

What is *physical* existence? to have mass or matter?

Doesn't space by its own definition 'not exist'? space *is* nothingness, isnt it? It doesn't 'exist', but nothingness exists which defies intuition and logic.

You can see space, which is strange considering it doesn't exist, doesn't it?

2007-10-10 23:54:36 · 11 answers · asked by Anonymous in Astronomy & Space

2007-10-10 23:43:30 · 3 answers · asked by lost 3 in Engineering

pls help me.....

2007-10-10 23:42:49 · 12 answers · asked by Anna F 1 in Mathematics

2007-10-10 23:42:35 · 31 answers · asked by Anonymous in Zoology

2007-10-10 23:36:16 · 2 answers · asked by Anna F 1 in Mathematics

Suppose you are running carying a mirror in frint of you.Now if your velocity keeps increasing and slowly approaches the velocity of light then how will your image change?

2007-10-10 23:27:41 · 7 answers · asked by S V R 1 in Physics

2007-10-10 23:23:23 · 5 answers · asked by Kazuto D 1 in Engineering

2007-10-10 23:08:48 · 18 answers · asked by pixie bear 2 in Biology

There's a link to the photo. I coudn't find it anywhere on the web and it was a little disconcerting as the thing was about an inch in length and seemed really keen on landing on my face every time I tried to sleep! It has very long antennae, and the shape reminds me of a mosquito.

I really don't think it's a dragonfly before anyone mentions it:

http://www.flickr.com/photos/7513385@N07/1541647714/

I'd love to know what it is as I've honestly never seen one before and am deeply intrigued!

PS. I'm sorry about the terrible quality, it's the best I could do with my camera!

2007-10-10 23:02:02 · 8 answers · asked by Spike 3 in Zoology

2007-10-10 22:53:59 · 14 answers · asked by Anonymous in Astronomy & Space

ln x + ln(y^2) = 3

2007-10-10 22:53:49 · 3 answers · asked by i<3WL 2 in Mathematics

Are they conditions (or have there been conditions) when a mass which orbits a primary (similar to an asteroid belt) coalesces into a solid ring around that primary? I would like to assume that this mass has a radius similar to our distance form the sun and that the ring might posses enough gravity to hold an atmosphere. Under what conditions could this form?

2007-10-10 22:48:55 · 3 answers · asked by Gaspode the wonder dog 4 in Physics

2007-10-10 22:37:10 · 10 answers · asked by Anonymous in Astronomy & Space

2007-10-10 22:24:25 · 7 answers · asked by Eskimo Lee 2 in Biology

2007-10-10 22:14:32 · 5 answers · asked by Anonymous in Zoology

Calculate the reaction free energy of

H2(g) + I2(g) 2HI(g)
when the concentrations are 0.026 mol L-1 (H2), 0.33 mol L-1 (I2), and 1.84 mol L-1 (HI), and the temperature is 700K. For this reaction Kc = 54 at 700 K.

a. +11.6 kJ mol-1
b. 0 kJ mol-1
c. -11.6 kJ mol-1
d. +2273 kJ mol-1

2007-10-10 22:03:41 · 1 answers · asked by awoodifield84 1 in Chemistry

I mean,out of all the life out there,they are sure to exist.How evil do you think they are?Would they hate,or,get along with humans?Why?

2007-10-10 21:55:50 · 26 answers · asked by Life goes on... 6 in Paranormal Phenomena

if yes, why? you can also give some links answering this. thank you. :)

2007-10-10 21:48:04 · 7 answers · asked by Alyssa 2 in Parapsychology

If the temperature was 0ºC today, but tomorrow it is going to be twice as cold, what temperature would it be?

2007-10-10 21:43:04 · 13 answers · asked by Simon H 2 in Weather

Jack be nimble, Jack be quick, Jack jumped over the candlestick with a velocity of 5.0 m/s at an angle of 30.0 degrees to the horizontal. Did Jack burn his feet on the 0.25 m high candle?

Here's the problem... I think I need to know the time of the jump to figure out if he would have made it over or not, but I can't figure out how to do it...
Can someone please explain to me how to do this?
Thanks in advance.

2007-10-10 21:42:00 · 7 answers · asked by Anonymous in Physics

2007-10-10 21:32:27 · 16 answers · asked by Anonymous in Zoology

18. Match the geologic features with the type of plate boundaries they are associated with.
Convergent plate boundaries
Divergent plate boundaries
Transform plate boundaries

Andesitic volcanoes
Continental collisions
Deep-focus earthquakes
Deep-sea trenches
Island arcs
Long linear scarps
Mid-ocean ridges
Normal faults
Reverse faults
Rift valleys
Strike-slip faults
Subduction zones

19.Match each mountain/island system with the kind of convergent plate boundary that formed it (if any).

Continental crust colliding with continental crust
Continental crust colliding with oceanic crust
Not a case of plate convergence

Aleutian Islands
Alps
Andes Mountains land and ocean crust collide?
Appalachian Mountains
Cascade Mountains land and ocean crust collide?
Hawaiian Islands
Himalayan Mountains
Mariana Islands
Ural Mountains

2007-10-10 21:23:41 · 7 answers · asked by obsidiangrl 2 in Earth Sciences & Geology

6. How did non-believers in Wegener's theory explain plant and animal distributions in the southern hemisphere?
Dispersal by winds
Dispersal via now-sunken land bridges

7. What finally convinced geologists that the continents did move?
Dinosaur distributions
Lystrosaurus in Antarctica
Mantle convection
Paleomagnetism

9. When a ship passes over seafloor that has a 'reverse' magnetic polarization, how does this effect the magnetic field reading?

The magnetic field is directed east.
The magnetic field is directed south.
The magnetic field is directed west.
The strength of the magnetic field is slightly stronger than usual.
The strength of the magnetic field is slightly weaker than usual.

14. Which sea is an example of rifting forming an incipient ocean?
Baltic Sea
Bering Sea
Black Sea
English Channel
Red Sea

16. How does plate tectonic theory explain the Ural Mountains separating Europe and Asia?
Ancient collision and suturing of Europe and Asia
Eurasia is moving over a hot spot in the mantle
Incipient rifting apart of Europe and Asia
Intraplate orogenesis in Eurasia
The Urals are the one mountain chain that was better explained by older theories.

2007-10-10 21:17:32 · 2 answers · asked by obsidiangrl 2 in Earth Sciences & Geology

2007-10-10 21:16:28 · 7 answers · asked by Anonymous in Mathematics

1. What is the concept that adding or removing a weight from the earth's crust causes it to depress or rebound?
Isostasy
Plate tectonics
Rifting

2. What name did Wegener give to his theory of horizontal crustal movements?
Continental drift
Isostasy
Plate tectonics
Rifting
Seafloor spreading

4. What type(s) of evidence did Wegener use to support his theory?
Distributions of fossil plants and animals
Distributions of modern plants and animals
Geographic fit of the continents and features thereon
Paleoclimatic oddities such as glacial till, coral reefs, and coal
All of the above

5. Why was Wegener's theory rejected by geophysicists of the 1920's?
Lack of a mechanism for continents to plough through oceanic crust
The concentration of continents in the northern hemisphere
The presence of a continent directly over the south pole

2007-10-10 21:16:26 · 3 answers · asked by obsidiangrl 2 in Earth Sciences & Geology

2007-10-10 20:59:31 · 7 answers · asked by Anonymous in Biology

importance in forensic medicine

2007-10-10 20:48:30 · 2 answers · asked by jeremiah o 1 in Medicine

2007-10-10 20:47:05 · 9 answers · asked by kxkx 2 in Weather

Or do they...?

2007-10-10 20:38:12 · 2 answers · asked by Lance A 1 in Zoology