Science & Mathematics - 14 January 2007

Sorry to sound so ignorant.

2007-01-14 12:39:04 · 3 answers · asked by mare 1 in Mathematics

2007-01-14 12:38:47 · 7 answers · asked by Anonymous in Weather

2007-01-14 12:37:59 · 18 answers · asked by tboyd322001 3 in Biology

My essay is on the documentary an Inconvenient Truth and I have proved Al Gore wrong in three of my arguments. What should I say in my concluding paragraph about him being wrong? (ie. he should have done more research, his results could have been more accurate, etc)

2007-01-14 12:36:34 · 5 answers · asked by untilyoucamealong04 3 in Weather

2007-01-14 12:34:58 · 11 answers · asked by Anonymous in Astronomy & Space

i wasn't sure...just checkin...

2007-01-14 12:33:36 · 3 answers · asked by peppermint746 2 in Mathematics

Supposedly, Mars revolves around the sun faster than earth does and it is April, on mars right now. Is It?

2007-01-14 12:32:59 · 17 answers · asked by Anonymous in Astronomy & Space

Here is the question...

A student analyzes a green solution in a spectophotometer and sets the baseline reading to 97.4% (using distilled water) at the wavelength 450nm. He then obtains a 47.3% reading for his green solution at this same wavelength. Determine the absorbance of the solution at this wavelength.

***
I think I'm over thinking this, since I tried to use Beer's Law to solve, but we've never gone over Beer's Law in this class.

2007-01-14 12:31:08 · 1 answers · asked by Anonymous in Chemistry

The molality of lead nitrate in 0.726 M Pb(NO3)2 (density 1.202 g/mL) is ____________________.

Question 1 answers
0.604 m
0.873 m
0.755 m
1.32 m
1.23 m

If you could be explain how you got the answer please

2007-01-14 12:29:00 · 4 answers · asked by Anonymous in Chemistry

2007-01-14 12:28:49 · 7 answers · asked by melissa a 1 in Mathematics

If one item costs $50 and a second one costs $70 - what is the percentage over $50 that the second one costs?

2007-01-14 12:28:36 · 2 answers · asked by smokey 2 in Mathematics

2007-01-14 12:27:55 · 12 answers · asked by pumpmar 2 in Geography

2007-01-14 12:27:17 · 18 answers · asked by melissa a 1 in Mathematics

Do you know of any good books about neurosurgery...I am considering it as a choice after high school...I already read:

Another Day in the Frontal Lobe by Katrina Firlick
When The Air Hits Your Brain by Frank Vertosick, Jr. M.D.

Do you have any other ones that you would recommend?

2007-01-14 12:26:40 · 3 answers · asked by nikkigurl232004 2 in Medicine

2007-01-14 12:26:24 · 2 answers · asked by Anonymous in Earth Sciences & Geology

Write an equation of a line in y=mx+b form, that contains a slope of -1/5 and passes through(10, 7)

Write an equation of a line in y=mx+b fpm, that passes through the points (1, -4) and (-1,6)

Write an equation of a line in y=mx+b form that contains the following point(6,-5) and is parallel to its given line y=1/2x-3

Write an equation in y=mx+b form that contains the following point (20,7) and is perpendicular to its given line, y=-5x=11

Thanx a BUNCH!!!!

**KIA**

2007-01-14 12:25:31 · 3 answers · asked by Anonymous in Mathematics

2007-01-14 12:24:57 · 5 answers · asked by Rebecca 1 in Mathematics

2007-01-14 12:24:01 · 5 answers · asked by Confused guy 1 in Zoology

Doesn't te cold air we're getting now feel shallow, like it feels comfortable and you can feel the warmth and moistening of the air on your skin, but at the same time, it's actually brisk.

2007-01-14 12:22:07 · 7 answers · asked by Anonymous in Weather

jupiter is 4.83x10 to the 8th power mi from the sun and earth is 9.32x10 to the 6th power mi from the sun. how many times as far is the distance from the jupiter to the sun as the distance from the sun to the earth? round to the nearest whole number if necessary.

2007-01-14 12:18:05 · 5 answers · asked by chironjitd 1 in Mathematics

two vectors known for origin and angle (X1, Y1, Alfa) and (X2,Y2, Beta), is it possible to find out the point the two vectors crosses together??

2007-01-14 12:15:44 · 2 answers · asked by lilacfun23 2 in Mathematics

2007-01-14 12:11:27 · 10 answers · asked by Anonymous in Mathematics

i have to make a volcano in one day and i have to make it erupt with out using vinigar...any help??????????????????

2007-01-14 12:10:43 · 2 answers · asked by live♥love♥laugh 2 in Earth Sciences & Geology

which one is sugar and which is powdered sugar.

2007-01-14 12:08:55 · 3 answers · asked by connie 1 in Chemistry

Are positrons classified as a lepton or a quark?

2007-01-14 12:06:10 · 3 answers · asked by Anonymous in Physics

I need help on these two problems regarding work, power, and machines:

1. An effort force of 200 N is applied to an ideal machine to move a 750 N resistance a distance of 300 cm.
A) Through what distance must the effort force act?
B) What is the ideal mechanical advantage of the machine?

2. A mover pushes a 260-kg piano on wheels up a ramp 7 m long onto a stage 1.75 m above the floor. The mover pushes the piano with a force of 680 N.
A) How much work does the mover do?
B) What work is done on the piano by the machine?
C) What is the efficiency of the machine?

Thanks for all your help!

2007-01-14 12:05:56 · 3 answers · asked by Anonymous in Physics

2007-01-14 12:04:30 · 2 answers · asked by LaLa 2 in Chemistry

2007-01-14 12:02:14 · 10 answers · asked by blacksky515 1 in Chemistry

please show all your work...i can't seem to get this one

2007-01-14 11:59:45 · 5 answers · asked by huronda_hottie_2006 1 in Mathematics

I know that the Police use luminol spray and other things like that, but those are expensive and harmful to children. What can I use for a Science Fair that is cheap and easy to use?

2007-01-14 11:59:09 · 3 answers · asked by Anonymous in Biology