Science & Mathematics - 16 July 2007

2007-07-16 07:26:35 · 2 answers · asked by Anonymous in Chemistry

I am going to take Biology, Chemistry and Physics next year at A-Level. I will also be complimenting the sciences with A-Level German.

I am curious to know which one is the hardest and why?

2007-07-16 07:26:05 · 19 answers · asked by Anonymous in Other - Science

♥

2007-07-16 07:23:47 · 28 answers · asked by Anonymous in Chemistry

2007-07-16 07:22:04 · 10 answers · asked by sweetysource 2 in Astronomy & Space

100
Σ (i^2 - 3j +2)
i=1

how would i figure out the sum?

2007-07-16 07:18:58 · 4 answers · asked by sky l 1 in Mathematics

How many liters of oxygen (O2) are needed to convert 100 liters of hydrogen (H2) to water (H2O)?



How many liters of hydrogen chloride (HCl) may be produced from 100 liters of H2?



How many cubic feet of oxygen (O2) are needed to convert 100 cubic feet (100cf) of carbon monoxide (CO) to carbon dioxide (CO2)?



How many liters of oxygen (O2) must react with sulfur dioxide (SO2) to produce 50 liters of sulfur trioxide (SO3)?



How many liters of hydrogen (N2) are needed to produce 100 liters of ammonia (NH3) by direct combination with nitrogen?



How many milliliters of carbon dioxide (CO2) can be formed when carbon (C) is burned in 1 liter of oxygen (O2)?



If 10 liters of hydrogen (H2) weigh 1.0g, and 10 liters of oxygen (O2) weigh 16g, how much would 10 liters of water vapor (H2O) weigh?



If 20 liters of carbon monoxide(CO) weigh 28g, and 20 liters

If 50 liters of nitrogen (N2) weigh 56g and and 50 liters of hydrogen (H2) weigh 4.0g,

2007-07-16 07:18:14 · 2 answers · asked by alex h 3 in Chemistry

Volume of a 5 year old boy

2007-07-16 07:17:49 · 7 answers · asked by Anonymous in Mathematics

2007-07-16 07:16:25 · 11 answers · asked by mirrorbee 6 in Astronomy & Space

A snail is at the bottom of a well, and decides to climb to the top! Each day it climbs 2 feet, but loses 1 foot during it's nightly nap. The well is 20 feet deep! How long would it take him to reach the top?
Hint: The awnser is NOT 20 days.

2007-07-16 07:15:27 · 7 answers · asked by Anonymous in Mathematics

2007-07-16 07:15:06 · 2 answers · asked by abc 1 in Physics

i need the same question for school!!!please help me someone!

2007-07-16 07:06:55 · 16 answers · asked by jakey suave 1 in Mathematics

simplify the radicals and combine when possible
1.
5x√(72) + √(8x^2)

2.√(m^2 p) + √(n^2 p) - √(n^2 n^2 p)

thanks

2007-07-16 07:05:38 · 4 answers · asked by Anonymous in Mathematics

2007-07-16 07:05:21 · 9 answers · asked by taogent 2 in Astronomy & Space

2007-07-16 07:03:48 · 14 answers · asked by mac 2 in Engineering

2007-07-16 07:03:23 · 9 answers · asked by taogent 2 in Astronomy & Space

The question is as follows: Your company is seeking to tender for work with three clients: A, B & C. It estimates that the probability that it will secure tender A is 0.2, tender B is 0.3 and tender C is 0.4. Find the probability that your company will:

(a) win all 3 tenders
(b) win only one tender

Help!!!!!!!

2007-07-16 07:01:40 · 4 answers · asked by brief reunion 1 in Mathematics

2007-07-16 07:00:33 · 16 answers · asked by mirrorbee 6 in Astronomy & Space

What is the answer for...
r is not equal to +or- 2

r Squared - 5r +6
------------------------ = ?
r Squared - 4

2007-07-16 06:57:07 · 8 answers · asked by Shou~Shou 1 in Mathematics

summer school question...

2007-07-16 06:52:23 · 9 answers · asked by buggerrocks1 1 in Astronomy & Space

2007-07-16 06:49:46 · 8 answers · asked by MisSheik 3 in Mathematics

The function f(x) = x^3 + 5x^2 + 4x find f(2) and when f(x)=0


find the domain of this function
f(x)= x^2-4
---------
x^2-1


I have no idea how to do this. If someone could help me out that would be awesome.

2007-07-16 06:47:10 · 7 answers · asked by jared c 1 in Mathematics

25x^5y^3 + 10x^2y^2 + 15x^3y^5

2007-07-16 06:41:09 · 7 answers · asked by jared c 1 in Mathematics

2007-07-16 06:36:54 · 1 answers · asked by beeboppinbippity 1 in Mathematics

2007-07-16 06:35:29 · 3 answers · asked by Anonymous in Weather

Right now it is a caterpiller, and i need to know what they eat. Does enyboby know a good website to find that out? thank you.

2007-07-16 06:34:29 · 3 answers · asked by duster360 4 in Zoology

Will it hurt the caterpiiler if i give it necter?

2007-07-16 06:30:30 · 4 answers · asked by duster360 4 in Zoology

2007-07-16 06:29:52 · 5 answers · asked by Anonymous in Chemistry

Reason I ask for the 3 different types is I understand that RF has skin effect. But if Ac and Dc is same why is it we need such heavy cables? And not simply a weaved cable over a much cheaper core.

2007-07-16 06:25:55 · 3 answers · asked by Anonymous in Physics

2007-07-16 06:20:26 · 2 answers · asked by bowling301301 2 in Medicine

Should the eggs be moved to a new nest we create?
Does it make sense to try to incubate the eggs and release the turtles when they hatch?
What is the best approach?

2007-07-16 06:17:58 · 5 answers · asked by Doom Lord 2 in Zoology