Science & Mathematics - 29 October 2007

who was the first man on the moon and were was the lanch center and what is that centers name. please give dates.

2007-10-29 08:32:48 · 3 answers · asked by kate y 1 in Astronomy & Space

Here's the recipe for 50X TAE buffer
first add about 900ml dH2O
242 g Tris Base
57.1 ml acetic acid
18.6 g EDTA
Adjust pH to 8.1
Add dH2O to 1000ml

i only added 121 g of Tris but i already have 1L total. how do i fix this? thanks.

2007-10-29 08:32:47 · 3 answers · asked by bob oso 2 in Biology

If I have 2 pendulums suspended a distance "x" from each other on a piece of string and set one in motion with a direction perpendicular to the string the 2 pendulums are suspended from (its difficult to describe) then energy will be transferred between the 2 in the same way as the more classical setup of 2 pendulums coupled by a spring. My question is, can I use the same equations of motion for my modified setup, or would I have to work out the equations by using the Lagrange equations/by using Hooke's law from scratch?

2007-10-29 08:32:46 · 2 answers · asked by Anonymous in Physics

For this problem, we are asked to find the points on the curve where the tangent is horizontal or vertical.

1. x = Cos(3t), y = 2sin(t)


I know that dy/dt = 2Cos(t) and

dx/dt = -3sin(3t)


And that you set dy/dt equal to 0 to find the horizontal tangents, and dx/dt equal to 0 to find the vertical tangents. However, I am wondering what are the correct restrictions to apply in each case (for dx/dt and dy/dt) to find the correct number of the respective horizontal and vertical tangents. For instance, since dy/dt involves cosine, would I restrict it to values between 0 and pi (including these endpoints as well) and thus end up with a result that the horizontal tangent only occurs at pi/2, since this is the only location within the interval between 0 and pi where the cosine is 0?

Similarly, for dx/dt, since it involves sine, would I restrict it to 0 to pi/2 (including these endpoints as well) and thus say that the vertical tangents occurs at 0 and pi/3 (pi/3 because of the 3 in the expression, which cancels out with the 3 in pi/3 making it just pi, where sine is 0) because these are the only points in the given expression where the sine is 0 for the interval of 0 to pi/2?

Is all of this correct? If not, please indicate what are the correct restrictions to apply in each case (dx/dt and dy/dt), and why they are not what I listed above.

2007-10-29 08:32:10 · 1 answers · asked by Vortex 1 in Mathematics

There is 12 coins which look the same but one of them weigh differently (heavier or lighter). How can you determine in only three weightings which coin is different and if it is heavier or lighter?

2007-10-29 08:30:34 · 4 answers · asked by Arjun C 2 in Mathematics

2007-10-29 08:29:14 · 1 answers · asked by Anonymous in Mathematics

1. List some pull factors that influence migration?

2. What is the largest mountain range in Latin America?

2007-10-29 08:29:02 · 4 answers · asked by Anonymous in Geography

I had to carry out these experiments:
Mix calcium carbonate with dilute hydrochloric acid in a test tube with a side arm and dip the delivery in a test tube containing calcium hydroxide and cork the test tube to trap any gases. A gas was formed and a white precipitate formed with the CaOH. my first equation was:
CaCo3+2HCl--> CaCl2+H2O+Co2.... I need another equation .. something to do with the Co2 forming something.....

The next experiment was to mix potassium manganate (VII) with a few cm^3 of concentrated hydrochloric acid.....and a gas was given off.. something like chlorine.... what would be the equations?

and can you tell me how these gases were formed?

2007-10-29 08:27:58 · 1 answers · asked by petra_sweety 3 in Chemistry

i would ask my astronomy professor but i'm not certain that it is appropriate, considering the setting.

2007-10-29 08:26:20 · 5 answers · asked by Dr.Know-it-All 2 in Astronomy & Space

2007-10-29 08:25:29 · 2 answers · asked by Lauren D 1 in Biology

so the base is 6 and the exponent is 0 if u evaluate it wut does it equal?

thanx, god bless
KT

2007-10-29 08:24:32 · 5 answers · asked by Anonymous in Mathematics

2007-10-29 08:23:51 · 7 answers · asked by Paperdoll 1 in Medicine

Are we the only ones here in the Universe? Most smart people think that there MUST be somebody else out there somewhere.

If we even THINK that there might be others out there, is it morally OK to send hazardous waste out into space, not knowing, really, where it might end up?

What if it hits some alien on the head a million years from now? And what if the alien is a boy whose Dad died when he was only 10 (Fifth Grade, Miss Morrison's class) and he had to take care of his Mom and and his sister (Piret, funny name, I know), because his Dad always said If anything happens to me, you're the man of the house and the boy promised and Dad said I know I can count on you son and wouldn't it be unfair to hit that Alien boy on the head with a bucket of Earth Garbage and prevent him from keeping his promise?

2007-10-29 08:23:15 · 9 answers · asked by nobodyhere 5 in Astronomy & Space

What is the percentage increase from 410200 to 419600?
I am a little confused with this plz help it is for my homework!

2007-10-29 08:22:53 · 17 answers · asked by Anonymous in Mathematics

Steps!Thanks a lot!!!

2007-10-29 08:22:23 · 9 answers · asked by Anonymous in Mathematics

often these molecules are
A) amino acids
B) nucleotides
C) oligosaccharides
D) inorganic ions

2007-10-29 08:21:41 · 2 answers · asked by Anonymous in Biology

A) skeletal muscle
B) acteycholine
C) detects external and internal stimuli
D) lines the lumen of the small intestine

2007-10-29 08:16:57 · 2 answers · asked by Anonymous in Biology

....................

2007-10-29 08:16:03 · 17 answers · asked by Curtis W 1 in Astronomy & Space

or somewhere else, and where are we all going ?

2007-10-29 08:13:19 · 10 answers · asked by Anonymous in Biology

2007-10-29 08:12:38 · 14 answers · asked by Anonymous in Paranormal Phenomena

When they was on the dark side of the moon, they lost all radio contact. Buzz Aldrin saw something and apparently he went mad.

2007-10-29 08:12:35 · 19 answers · asked by Anonymous in Astronomy & Space

A water turbine operates from a water supply that is 100 ft above the turbine inlet. It discharges to the atmosphere through a 6-in. diameter pipe with a velocity of 25 ft/s. If the reservoir is infinite in size, determine the power out of the turbine if the density of water is 62.4 lbm/ft3.

2007-10-29 08:10:56 · 2 answers · asked by Anonymous in Physics

2007-10-29 08:10:35 · 4 answers · asked by heatherrr323 1 in Astronomy & Space

2007-10-29 08:09:08 · 14 answers · asked by heatherrr323 1 in Astronomy & Space

2007-10-29 08:08:25 · 1 answers · asked by heatherrr323 1 in Astronomy & Space

does iodine react with water in its solid form? i really need to know

2007-10-29 08:06:37 · 5 answers · asked by Anonymous in Biology

if evolution happened between a man and a monkey, why has it stopped happening?

2007-10-29 07:58:49 · 4 answers · asked by dwane c 1 in Biology

this is for my school project, conics section

2007-10-29 07:57:54 · 1 answers · asked by phil 2 in Engineering

2007-10-29 07:54:59 · 1 answers · asked by Anonymous in Physics

2007-10-29 07:53:28 · 23 answers · asked by Anjelica(: 3 in Mathematics