Science & Mathematics - 28 September 2007

I'm thinking the bear is less dangerous than the other two, but what do you think?

2007-09-28 18:39:14 · 15 answers · asked by Chris 2 in Zoology

Why is this so? I can remember details of events that goes back to 20 years but can never remember names of new friends/acquaintance after 3 secs, unless I re-asked for the 2nd or 3rd time. So, can you tell me if my memory is good or bad?

2007-09-28 18:31:41 · 3 answers · asked by Lost-Hurt-Disappointed 3 in Biology

100/43 what number will be in the house?

will my answer be 0.43 or 2.33

2007-09-28 18:09:09 · 5 answers · asked by ALESANA 7 in Mathematics

I mean truly revolutionary inventions, like writing, agriculture, gunpowder, the computer, and stuff like that. What do you think that invention might be? How far into the future do you think it will be?

2007-09-28 18:07:56 · 3 answers · asked by Anonymous in Other - Science

A constant force of 3.1 N to the right acts on a 17.6 kg mass for 0.43 s. what is the final velocity? Find the final velocity of the mass if it is initially moving along the x-axis with a velocity of 2.02 m/s to the left.

2007-09-28 18:01:24 · 3 answers · asked by Roxana R 1 in Physics

i know the answer is 27 but i have no idea why. can anybody explain it to me?

2007-09-28 18:01:13 · 13 answers · asked by Anonymous in Mathematics

And What Happens To The EM Waves When They Reach The Edge?

2007-09-28 17:43:44 · 9 answers · asked by engelfeurs 2 in Astronomy & Space

1)Mass curves space-time around it......but is it not possible to some-how fold the space-time in the form of a SPHERE at a place such as a sort of folding space-time,so if person named Michael WHO died 2yrs. ago,can return back to our present?? if its so wouldn't it cause any paradox?
QUESTION 2) If we consider QUANTUM TUNNELING,particles cross energy barrier even though they don't have that amount of energy to do that...may be that the particles take a short-cut through space-time using something called wormholes(though only theoritical) because in the Cs vapour experiment the wave emer5ged 20feets away FROM T HE OTHER SIDE IN AN "INSTANT" SUGGESTING thast it travelled faster than light in the chamber....but maybe a wormhole connnected from one side of the chamber to the other side of the chamber..maybe Cs vapours at a particular cond. of PVT open up certain miniature wormholes around US?

2007-09-28 17:42:42 · 4 answers · asked by Swapnil B 2 in Physics

the title speaks for itself

2007-09-28 17:39:27 · 19 answers · asked by LC 2 in Mathematics

2007-09-28 17:36:30 · 8 answers · asked by aim w 3 in Astronomy & Space

19.000
0.00006
1.6090 x 10 ^8
13600.
0.05305
3.2710
0.098000

2007-09-28 17:31:01 · 4 answers · asked by 41 1 in Chemistry

mere can i get desighns for making home made bongs out of thing you usualy dont have to go buy like i make gravity and anti gravity out of old containers ?

2007-09-28 17:30:22 · 4 answers · asked by poeticman 4 in Engineering

Hint -The answer is not the obvious one!

2007-09-28 17:29:47 · 20 answers · asked by Anonymous in Astronomy & Space

In one experiment, 0.170 L of SnCl4 (d = 2.226 g/mL) was treated with 0.347 L of triethylaluminum (Al(C2H5)3); d = 0.835 g/mL).
What is the theoretical yield in this experiment (mass of tetraethylstannane, Sn(C2H5)4)?
If 0.194 L of tetraethylstannane (d = 1.187 g/mL) were actually isolated in this experiment, what was the percent yield?

2007-09-28 17:28:56 · 1 answers · asked by Anonymous in Chemistry

5x + y - z = 6
x + y + z = 2
3x + y = 4

solve for x, y, and z.

2007-09-28 17:24:10 · 4 answers · asked by sharizzle 1 in Mathematics

What does the side of another cube measure if it is to be twice the volume of the first cube?

2007-09-28 17:22:52 · 4 answers · asked by Anonymous in Mathematics

2007-09-28 17:22:00 · 8 answers · asked by rodsycks 1 in Biology

what is bore (of needle)

cardia, gastric

cholangiogram, positive

2007-09-28 17:20:44 · 3 answers · asked by Lauren 1 in Medicine

2007-09-28 17:18:46 · 4 answers · asked by SANDY T 1 in Astronomy & Space

The function V(x)=X^3 may be used to find the volume of a cube if we are given the length x of a side

2007-09-28 17:13:35 · 10 answers · asked by Jetboy 1 in Mathematics

..after all; it is the most abundunt element in the Universe, so is He/She???

2007-09-28 17:12:21 · 12 answers · asked by Bug Eye 3 in Astronomy & Space

2007-09-28 17:12:03 · 8 answers · asked by SANDY T 1 in Astronomy & Space

here are some problem #1. 1/4 #2. 3/5 #3. 4/9 #4. 1/8 1/6 20/40 6/15 35/50 help please!

2007-09-28 17:07:37 · 6 answers · asked by Valerie5_0 2 in Mathematics

Limit definition in book is

F(x) is said to converge to L, as x approaches a, if and only if for every epsilon > 0 there is a delta > 0 such that

0 < |x-a| < delta implies |f(x) - L| < epsilon.

is the value of delta always presumed to be less than 1? because the book makes this assumption repeatedly when proving existence of limits in certain functions. Let me know

2007-09-28 17:04:49 · 3 answers · asked by Anonymous in Physics

Just curious.
Well to be honest, I was wondering if NASA can't build a robot space tug to go out to the asteroid belt to pick up a suitable Icy Ice asteroid to mine/process into rocket fuel and a Metal Element asteroid to mine/process-*experiemental ore processing and raw materiel fabrication.

Because, once the robot space tugs have a viable re-fueling depot (in orbit) they can go back out to get more asteroids for exploration & processing for building materials.
We would only have to send up the exotic essentials for building our future space station/platforms.

Well, then it gets more complicated of course, but I just had to ask, we gotta start somewhere,...

Thanks to those who Do know better,... cheers!!!

2007-09-28 17:03:08 · 4 answers · asked by somber_pieces 6 in Astronomy & Space

2007-09-28 16:51:07 · 12 answers · asked by Anonymous in Astronomy & Space

The green circle is the largest of the 3 circles. The red circle is the smallest circle and is located at the centre of the green circle. The yellow circle is the medium sized circle that touches the circumference of the small red circle and touches the circumference of the large green circle. Knowing that both the small red circle and the medium yellow circle are smaller than the large green circle and are placed within the large circle. The centre of the large green circle is O. The smallest circle has centre O and radius 2x centimetres.
The large circle has centre O and radius 2y centimetres. The third circle touches both the other two circles s shown. The three regions formed are coloured red, yellow and green as shown.

Q1) Explain fully why the radius of the third circle is (x + y) centimetres.

Write down, in terms of ㅠ, x and y, expressions for the area of the region that is coloured Q2) yellow,
Q3) green.

The area of the green region is twice the area of the yellow region.
Q4) Use this information to write down an equation involving x and y, and show that it simplifies to y^2 – 6xy + 5x^2 = 0.

Q5) Calculate the fraction of the design that is coloured yellow.

2007-09-28 16:50:39 · 4 answers · asked by Anonymous in Mathematics

Wouldn't it be possible to build a new type of space shuttle that could simply coast into orbit on interia alone if it accelerated to the desired Mach speed for its mass to attain a sub-orbital trajectory?

Then we can finally stop sending our astronauts up on potential bombs waiting for an opportunity to go boom.

Also the potential for a commercial civil aerospace program could be acheivable a lot sooner. If there are entrepenures out there with enough moxie to make it happen.

2007-09-28 16:46:42 · 4 answers · asked by somber_pieces 6 in Astronomy & Space

can i ask

2007-09-28 16:41:17 · 3 answers · asked by MuMu_bear 1 in Engineering

Is this possible? When I was a child my eyes were mostly dk brown with a tiny tiny bit of green around the edges. Now I am 30 and my eyes are almost all green with only a tiny tiny bit of brown now on the inner part. One if more green than the other. Do eyes change color with age?

2007-09-28 16:35:21 · 3 answers · asked by Samantha 3 in Medicine