Science & Mathematics - 17 September 2007

The definitions I've seen for these terms have either been technical to the point of obscurity or without proper context.

2007-09-17 08:03:55 · 9 answers · asked by jaylaverdure 1 in Engineering

2a (a - 5 ) - 2a (3a - 5) + a ² + 3a

Thx

2007-09-17 08:03:13 · 6 answers · asked by Dante Alighieri 3 in Mathematics

Im evaluating an experiment whereby i reacted copper with iodine.
Once the two had reacted, copper iodide was left on the copper strip.
In class we scraped this off using a ruler.
I am now evaluating, and as part of my evaluation, i need to suggest a more accuarate way of ensuring all copper iodide is removed from the strip.
Does anyone know how this could be done?

2007-09-17 08:02:39 · 2 answers · asked by Lucy 4 in Chemistry

A reagent required 25 g of Magnesium sulfate MgSO4 * 7H2O (FW 245.5), only anhydrous crystal was available. How many grams of the anhydrous is needed to prepare this reagent?

The answer in the book is 12.17 grams

But how do you get that? I was way off.. I got something like 38.something.

2007-09-17 07:55:41 · 1 answers · asked by I_color_outside_the_lines 4 in Chemistry

My neighbor keeps telling me that if i don't quiet down my turtle from barking at night she'll call the cops. WTF? i think she's crazy. Turtles can't bark right?

2007-09-17 07:55:11 · 5 answers · asked by Anonymous in Zoology

Two questions: Please keep in mind that this is an introductory course that mixes computation and a little bit of theory. Your help will be greatly appreciated.

1.) Show that f(z)=|z| is continous.

2.) Use the fact that a function is continuous if and only if the inverse image of every open set is open to show that a composition of two continuous functions is continuous.

Please include an explanation. Thanks...

2007-09-17 07:50:30 · 1 answers · asked by linzaroo06 1 in Mathematics

how many grams of Calcium Carbonate are needed to produce 280g of Calcium Oxide ???? plz help

2007-09-17 07:41:36 · 6 answers · asked by Anonymous in Chemistry

for bioligy

2007-09-17 07:39:53 · 9 answers · asked by Anonymous in Biology

little or big

2007-09-17 07:37:32 · 4 answers · asked by Anonymous in Medicine

Im going in for surgery and Im very worried if I will should suddenly need a blood transfusion and if they didnt know my blood type!! And I dont know what type of blood I have!
What should I do??

2007-09-17 07:36:23 · 7 answers · asked by toenail 2 in Medicine

express (W/V) measurement in g/dL

I think I'm doing this wrong.

I have it set up like this so far:

85g/dL x 10 dL/1L x 1M/58 g and now I'm not sure where to go from here...am I doing this right?

2007-09-17 07:35:23 · 1 answers · asked by I_color_outside_the_lines 4 in Chemistry

determine the cost to supply enough vanillin so that the aroma could be detected in a large aircraft hanger with a volume of 6.2E7 ft3

2007-09-17 07:34:12 · 1 answers · asked by shake 1 in Chemistry

A. 2 twenties, 1 ten, 6 singles
B. 4 tens, 2 fives, 5 singles
C. 1 twenty, 3 tens, 5 singles
D. 2 twenties, 2 fives, 5 singles

2007-09-17 07:33:59 · 3 answers · asked by Sun S 1 in Mathematics

2007-09-17 07:32:15 · 3 answers · asked by tallman 1 in Mathematics

forgot to add - in fractional distillation
Thanks!

2007-09-17 07:29:28 · 1 answers · asked by Andrew B 1 in Chemistry

A soccer ball is kicked from the ground with an initial speed of 20.8 m/s at an upward angle of 48.0°. A player 40.6 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before it hits the ground? Neglect air resistance.

2007-09-17 07:23:37 · 2 answers · asked by James B 1 in Physics

2007-09-17 07:23:30 · 1 answers · asked by Kimberly L 1 in Chemistry

I'm stil at the beginning and have some difficulties

Let (X, M, u) be a mesure space such that u(X) < oo. Let f_n be a sequence of integrable complex valued functions defined on X that converges uniformly to a function f. Show that f is integrable and that Int f du = lim Int f_n du.

Show that the condition u(X) < oo is really essencial for this theorem.

Thank you for any help. Does this problem get easier if at first we suppose the functions f_n are real valued and then extend the conclusion to the complex case?

2007-09-17 07:23:20 · 2 answers · asked by Adrian 1 in Mathematics

(a) 36.9 g table sugar (C12H22O11) in 185 mL solution
_______ M
(b) 5.90 g LiNO3 in 685 mL solution
_______ M

2007-09-17 07:22:22 · 1 answers · asked by Kimberly L 1 in Chemistry

Does time exist in space?

2007-09-17 07:21:35 · 4 answers · asked by vince_oy 3 in Physics

(a) Ar(g), decrease P
-increase
-decrease
-stay the same
(b) Ne(g), increase T
-increase
-decrease
-stay the same

2007-09-17 07:21:11 · 1 answers · asked by Kimberly L 1 in Chemistry

(a) If the maximum acceleration that is tolerable for passengers in a subway train is 1.74 m/s2 and subway stations are located 836 m apart, what is the maximum speed a subway train can attain between stations? (b) What is the travel time between stations? (c) If a subway train stops for 24.0 s at each station, what is the maximum average speed of the train, from one start-up to the next?

2007-09-17 07:19:14 · 1 answers · asked by James B 1 in Physics

a 2(x - 4)^2 + 10
b 2(x - 4)^2 - 6
c 2(x - 4)^2 - 22
d 2(x + 4)^2 + 10
e 2(x + 4)^2 - 6
f 2(x + 4)^2 -22

2007-09-17 07:19:03 · 12 answers · asked by Niall R 1 in Mathematics

http://mlf1070.wordpress.com/2007/08/27/finding-god-in-physics/

Any scientists of any field want to help clarify any misconceptions in this essay?

2007-09-17 07:14:44 · 6 answers · asked by Anonymous in Physics

a bird needs to coordinate the responses to many stimuli when flying. which area of a bird's brain would be relatively larger than in a human brain?

help please

2007-09-17 07:01:58 · 5 answers · asked by Anonymous in Biology

please help, I am in calc and forgot how to do these...
4(a+h)^2

2007-09-17 07:01:35 · 3 answers · asked by toogood2u03 2 in Mathematics

a bird needs to coordinate the responses to many stimuli when flying. which area of a bird's brain would be relatively larger than in a human brain?

help please

2007-09-17 07:00:42 · 3 answers · asked by Anonymous in Zoology

pre cal prob please help.

2007-09-17 07:00:27 · 6 answers · asked by icygurl205 1 in Mathematics

in winter season air condition take ice the gas and power is ok but the condenser is take ice and blocked and heating is few special when the out sit temperature is minus zero degree
please gave me complete information

2007-09-17 06:58:16 · 3 answers · asked by khalil c 1 in Engineering

I am leaving my parent's health coverage in a short amount of time, and I am currently taking Straterra for ADHD. The medication is quite expensive, and I will not be able to afford it until I am back on health insurance. Can anyone recommend a good alternative for Straterra that would be less costly? I know that it means going back on stimulant-based medicines, but sadly I need to focus on cost. Also, if anyone has ever been in my shoes before, could you recommend any actions you took? Thanks in advance

2007-09-17 06:57:01 · 4 answers · asked by graffiti62 3 in Medicine