Science & Mathematics - 9 August 2007

H20

2007-08-09 11:43:08 · 5 answers · asked by meencantasexo 1 in Chemistry

2007-08-09 11:41:18 · 13 answers · asked by CRYSTAL L21 3 in Zoology

2007-08-09 11:38:22 · 5 answers · asked by BingoBanggoBongo 1 in Medicine

We're told to get naked and use the emergency shower located in the middle of the lab if we catch fire or spill a chemical even if it is minor. I'm just interested to see if anyone has or would actually do this.

2007-08-09 11:32:19 · 8 answers · asked by xdtsztr 3 in Chemistry

2007-08-09 11:29:11 · 2 answers · asked by extremely_nerd 1 in Mathematics

i am trying to be the first man to build a safe spaceship that goes 1 billion times the speed of light! and it should be finished by tomorrow i have been working 1 week nonstop and i just need to build a electromagneticregenerator overload stabilizer and i know the distance to the moon i just cant work it out i am very tired i even passed out i shouldn't even be on pc it just a tiny part and i cant help thinking how famous i would after this monoproject might work it out later when my head reboots
and please dont tell the gorvenment i want to be the first to tell them.

2007-08-09 11:18:30 · 15 answers · asked by mike 2 in Astronomy & Space

2007-08-09 11:15:07 · 1 answers · asked by Sublime 33 1 in Engineering

2007-08-09 11:01:39 · 4 answers · asked by genelle b 1 in Mathematics

Consider the following common ways of chemically producing electricity: lead storage battery, Leclanche dry cell, alkaline dry cell, Ni-Cad battery, fuel cell, lithium battery.

A. Which of these can be safely recharged
B. Which of these provide a constant voltage?
C. Which one of these can provide useful voltages to common electronic devices while still being the smallest and the most lightweight?
D. Which of these has easy replaced reagents, allowing the same device to be used for years?

*I'm sure there r more than one answer for some questions

2007-08-09 11:01:13 · 1 answers · asked by whyMe 2 in Chemistry

I mean it can only cover so much land? So is it possible to see rain falling right infront of you but not on you..
Hard to explain..

Like a barrier of rain.. :P

2007-08-09 11:00:40 · 5 answers · asked by tehstefan 2 in Weather

1) If the linear transformation T: R^n --> R^n is one-to-one and T(u-v) = 0, then u = v (u and v being vectors and 0 being the zero vector).

2) If the linear transformation R^n --> R^n is onto T(u-v)=0, then u=v (u and v being vectors and 0 being the zero vector).

3) If det(A) = 0, then T is neither onto nor one-to-one.

4) If T: R^n --> R^m is not one-to-one, then ker(T) contains infinitely many vectors.

5) Shears in R^2 are one-to-one linear operators.

2007-08-09 10:52:45 · 2 answers · asked by Anonymous in Mathematics

2007-08-09 10:50:11 · 13 answers · asked by Anonymous in Paranormal Phenomena

i need help with math i don't get it and i don't know how to do it at all i'm slow in a lot of things .. can some one please help me .. or talk to me

2007-08-09 10:46:15 · 10 answers · asked by tj 1 in Mathematics

1.a physics student lifts her 2kg pet rock 2.8m straight up. He then lets it drop to the ground. Use the Law of Conservation of Mechanical Energy to calculate how fast the rock will be moving (a)half way down and (b)just before it hits the ground
2.A 65kg girl is running with a speed of 2.5m/s. How much kinetic energy does she have? She grabs on to a rope which is hanging from the ceiling, and swings from the end of the rope. How high off the ground will she swing?
3.How much kinetic energy will the 80kg skier sliding down the frictionless slope have when he is 2/3 of the way down the ramp? The vertical height of the ramp is 60m.
4.A rubber ball falls from a height of 2m, bounces off the floor and goes back up to a height of 1.6m. What percentage of its initial gravitational potential energy has been lost? Where does this energy go? Has the Law of Conservation been violated?
5.How much work must be done to increase the speed of a 12kg bike ridden by a 60kg from 8.2m/s to 12.7m/s?

2007-08-09 10:38:34 · 2 answers · asked by Anonymous in Physics

What length of preparation time is needed to score very well on the MCAT standardized test? Months/years?

2007-08-09 10:35:31 · 4 answers · asked by cappatown23 3 in Medicine

2007-08-09 10:34:30 · 2 answers · asked by Anonymous in Biology

Do you believe there is a way around relitivity, will a sufficiently advanced culture one day find a way to transverse the space between the stars faster then light?

Remember, 200 years ago most educated people would sware up and down that a heavier then air vichael could never fly, that the sound barrer would never be broken, etc.

Granted, some will say these are mechanical problems and the light barrier is a matter of physics... However, what are the laws of physics but high-end mechanical problems?

Space itself can expand faster the light--Does that not imply a possibile back door around this restriction?

Also, keep in mind what we KNOW of physics is far from everything.

Opinions...

2007-08-09 10:30:05 · 16 answers · asked by Anonymous in Astronomy & Space

Describe the phosphorus cycle. Include its reservoir, functions in living systems, and how overloading it is affecting the ecosystem.

2007-08-09 10:28:24 · 5 answers · asked by Anonymous in Biology

4x=28

2007-08-09 10:27:34 · 6 answers · asked by trusofty 1 in Mathematics

2007-08-09 10:27:11 · 5 answers · asked by annie g 1 in Medicine

2007-08-09 10:25:12 · 4 answers · asked by Anonymous in Biology

2007-08-09 10:22:57 · 6 answers · asked by Anonymous in Mathematics

2007-08-09 10:19:24 · 4 answers · asked by Michael J P 1 in Geography

How do I find the distance between points in space?

Sample:

Find the distance from point K (2, 4, -6) and L (4, 6, 0)?

2007-08-09 10:10:50 · 3 answers · asked by journey 1 in Mathematics

1/3s +7/9 =4/3s

laurah_42@yahoo.com

2007-08-09 10:07:00 · 3 answers · asked by lala haha gaga mama 2 in Mathematics

I cannot draw the rhombus using this keyboard.

I have rhombus ABCD. Angle A = 40 degrees and diagonal AC = 20.

I tried using trig to find diagonal BD but was not able to.

How do I find the area of this rohombus given the data above?

Thanks

2007-08-09 10:04:46 · 2 answers · asked by journey 1 in Mathematics

I want to be an anesthesiologist...and I know surgeons are on-call...but are anesthesiologists too?

2007-08-09 09:54:20 · 3 answers · asked by jess_f85 1 in Medicine

Ok undoubably I'm going to debunked for this theory but what the hell..so here goes..so you can give your opinion.
my theory is this a black begins as a super massive star that has burned up all its energy but before the final supernova there is a very dense central object. rotating at very high speed upon the final supernova this energy speeds this central core to faster than light. its outer surface is moving faster than light but getting slower as it reaches each pole.
now if the object is travelling faster than light it will have a tendency to rip the fabric of the universe thus creating a gap between it and the outside universe except closer to each pole of object where the surface is moving slower at these two points energy will be released the reason why we cant see light is that light needs a medium to travel same as sound or throwing a peeble in a pool take away that medium and light cannot escape. there are no wormholes just a very sold object in our universe.

2007-08-09 09:53:47 · 11 answers · asked by Anonymous in Astronomy & Space

I was looking to make one of those detonator plunger boxes that they use in cartoons. It's a box that has a handle on top and when you push the the handle all the way down (kind of like a bicycle pump) the TNT, dynamite, or my case fireworks are detonates/ignited.

2007-08-09 09:53:44 · 7 answers · asked by mexicanonfire 3 in Engineering

You have a 10 pound weight and a 150 pound person.
If you drop the 10 pound weight on your hand from 4 feet it will hurt maybe even break your hand
If som1 jumped on your hand nothing will happend just hurt. Why is the 10 pound weight feel heavier when it falls?

2007-08-09 09:52:20 · 4 answers · asked by Anonymous in Other - Science