Science & Mathematics - 20 August 2007

/ = Division

2007-08-20 04:09:29 · 8 answers · asked by 2447 3 in Mathematics

2007-08-20 04:04:40 · 6 answers · asked by lynnleger11 2 in Mathematics

Its the show on Discovery where they show how ppl survive after a giant meteor hits the earth. Those scientists sure have looked into all the possibilities and scenarios. Do you think if and when a giant meteor crosses earths path that we will be ready to stop it?

2007-08-20 04:03:41 · 2 answers · asked by Balrog 2 in Astronomy & Space

Plutonium or Uranium

2007-08-20 04:00:46 · 14 answers · asked by Anonymous in Chemistry

Was just curious if marijuana or hemp I suppose is an annual or a perennial. I have always heard it's an annual, however you also hear the reason we have so many wild hemp plants in the midwest is because they grew it during world war 2. If it were an annual when they stopped planting wouldn't all the plants have died off?

2007-08-20 03:56:49 · 3 answers · asked by Anonymous in Botany

2007-08-20 03:53:03 · 8 answers · asked by Anonymous in Earth Sciences & Geology

2007-08-20 03:45:18 · 2 answers · asked by Raymarcus H 1 in Biology

Now, every time Apollo 15 is mentioned, somebody brings up 'the stamp thing'. It could have all been forgotten and NASA wouldn't have this dark cloud over Apollo 15 for posterity. (Besides, lots of other astronauts on other flights admitted to bringing 'unauthorized' envelopes on their flights - like Tom Stafford, for one, in his book, "We Have Capture").

2007-08-20 03:42:17 · 3 answers · asked by Anonymous in Astronomy & Space

In addition to being able to metabolize, grow, digest food, and excrete wastes, what functions must an organism perform if it is to survive?

2007-08-20 03:41:48 · 5 answers · asked by Anonymous in Biology

Two days ago I was walking around a building in the CNE that had a whole bunch of little stores in it.I wasn't thinking of anything and my mind was blank.All of a sudden my body froze up in fear.I felt something was horribly wrong and I turned around to have a man staring right into my eyes.I looked at him with wide eyes and walked away.Isn't that creepy!?

2007-08-20 03:37:23 · 19 answers · asked by Anonymous in Paranormal Phenomena

Is 0^0 accepted as 1?
I saw a question, which asks for the interval of convergence of the series Sigma x^n, n= 0 to n = oo
It diverges for all x different from zero, but then I got confused about x = 0. Can the question ask for sigma x^n staarting at n = 0?

2007-08-20 03:37:00 · 13 answers · asked by swd 6 in Mathematics

2007-08-20 03:34:17 · 1 answers · asked by Rosliana R 1 in Biology

2007-08-20 03:32:42 · 2 answers · asked by Luis Carlos G 1 in Other - Science

2007-08-20 03:20:05 · 4 answers · asked by Gabriel 3 in Mathematics

Have you ever seen a shooting star? Are you willing to stay up a little later one night in July or August to see many of them?

2007-08-20 03:13:15 · 19 answers · asked by Eiffel Tower 3 in Astronomy & Space

2007-08-20 03:11:38 · 9 answers · asked by Anonymous in Weather

2007-08-20 03:09:16 · 7 answers · asked by rashmi d 1 in Engineering

For example: topical acne medicine on one side of the face and not the other to test it

2007-08-20 03:08:58 · 3 answers · asked by jam 1 in Medicine

Do all liquids bend light, does ice, any difference between salt water. Keep it as simple as possible please, I am not blessed with much grey matter!

2007-08-20 03:08:49 · 15 answers · asked by Grinning Football plinny younger 7 in Physics

"evolution" means " the totality of evolution": the entire family tree with time in view of natural events.
"explain" means "explain in principle", not "computationally predict everything".
"current laws" exclude vague models.

To situate this question in its context, here are my answers to related questions:

Do mechanisms such as descent, mutation, gene flow, natural selection, etc. make *plausible* that the family tree is explained by physics? Yes, but still life may be special and it is not the original domain of physics.

Do they have predictive power in the family tree? Yes.

Do the laws of physics explain the totality of life? Most likely no.

Do the laws of physics explain some aspects of life? Sure, it is called biophysics. However, it uses specific models as evidence when it applies.

My bet is that your answer to the question depends on the way life is special for you. If you're a Creationist, no evidence is enough. I'm not a creationist, but still life is special for me.

2007-08-20 03:06:49 · 5 answers · asked by My account has been compromised 2 in Physics

it is literally true that, for example, time runs more slowly(by a tiny fraction!) inside a moving aeroplane than it does for those of us on ground... if u travelled in a fast spaceship to another star and back, ur journey might seem to u to take a few months, but u would return to find that many yrs had passed on earth....
Plz explain this.............

2007-08-20 03:00:16 · 7 answers · asked by Aqua 2 in Physics

chromosome

2007-08-20 02:48:49 · 4 answers · asked by gundi007 1 in Biology

2007-08-20 02:47:11 · 5 answers · asked by h3dg3h0g0827 1 in Weather

I have some problem about how to calculate power for my system. i use water jet as prime mover to move the turbine. Here i give the spec of my system :-

Water Jet spec
1. Operation pressure = 40 bar
2. Suction Volume = 17litre/minutes

We know that to calculate power is equal H(head) x flow rate x g x Efficiency...But for my system i don,t know the best way to calculate power. If i used this spec to calculate power, the result that i get is to small. So hope you can help me to simplify this problem. Thank you.

2007-08-20 02:46:39 · 2 answers · asked by yie 1 in Engineering

Geographic Information Systems (GIS)
GIS is a system of hardware and software used for storage, retrieval, mapping, and analysis of geographic data. Practitioners also regard the total GIS as including the operating personnel and the data that go into the system. Spatial features are stored in a coordinate system (latitude/longitude, state plane, UTM, etc.), which references a particular place on the earth. Descriptive attributes in tabular form are associated with spatial features. Spatial data and associated attributes in the same coordinate system can then be layered together for mapping and analysis. GIS can be used for scientific investigations, resource management, and development planning.

GIS differs from CAD and other graphical computer applications in that all spatial data is geographically referenced to a map projection in an earth coordinate system. For the most part, spatial data can be "re-projected" from one coordinate system into another, thus data from various sources can be brought together into a common database and integrated using GIS software. Boundaries of spatial features should "register" or align properly when re-projected into the same coordinate system. Another property of a GIS database is that it has "topology," which defines the spatial relationships between features. The fundamental components of spatial data in a GIS are points, lines (arcs), and polygons. When topological relationships exist, you can perform analyses, such as modeling the flow through connecting lines in a network, combining adjacent polygons that have similar characteristics, and overlaying geographic features.

2007-08-20 02:46:38 · 2 answers · asked by Nimalan 1 in Geography

I realize that perhaps the question should be 'why do the rest of the states HAVE daylight savings time?' but I am already aware of the reasoning behind this. I would like to know on what grounds Arizona disagrees with the reasoning; in other words, why they are different.

2007-08-20 02:41:34 · 4 answers · asked by Sarah 3 in Earth Sciences & Geology

I know it can change to kinetic and chemical and so on but can it be destroyed or eliminated etc... I have never been given a straight answer.

2007-08-20 02:37:56 · 5 answers · asked by Nate G 1 in Physics

i want to get one of my local library in nyc

2007-08-20 02:36:41 · 3 answers · asked by myboo257 1 in Engineering

father. In a baby that developes from the two gene contributors, the pairs of traits on its DNA will

A. no longer be related to those of the parents.

B. result from recombining traits from the mother and father

C. result from recombining the male traits around the female traits

D. be result of random matching errors

2007-08-20 02:36:07 · 3 answers · asked by Neesh 1 in Biology

all of my friends at school says im smart and put this unwanted pressure on me to excel in every class but I spend 7 hours each day studying. my school ends at 2:30 pm and I get home at about 3:00 pm. I study from 3 to 10 and sometimes longer than that. if they study that much they could make the same grade as me...so am i smart or do I study a lot?

2007-08-20 02:34:31 · 5 answers · asked by Anonymous in Mathematics