Science & Mathematics - 22 December 2007

2007-12-22 13:45:00 · 4 answers · asked by câmΦuflãgê 6 in Physics

do we know with certainty that it is right? does our mathematics fail in some instances?

2007-12-22 13:31:17 · 10 answers · asked by Anonymous in Mathematics

When we city dwellers drive along the rural landscape, we often see large cylindrical rolls of hay in the fields. If left in the field, will the interior turn to silage? If so, is the process more efficient if the rolls are brought into a barn? More efficient if enveloped with a plastic cover? Is it considerably cheaper than putting the hay into a silo? They look rather expensive.

2007-12-22 13:30:06 · 5 answers · asked by greydoc6 7 in Agriculture

..volume, total surface area , total length of the edges and the number of vertexes of a solid cube of side x unit is always a perfect cube.....? please help..

2007-12-22 13:27:18 · 5 answers · asked by jje92 1 in Mathematics

2007-12-22 13:24:38 · 29 answers · asked by brendan d 1 in Astronomy & Space

2007-12-22 13:17:43 · 0 answers · asked by Anonymous in Chemistry

Hi i have two equations and want to work out how to get from one to the other, but im abit stuck.

ANy help appreciated

zevB = mv2/r
(the two is a squared sign)

z, e, v, B, m, v, r are all variables (im doing mass spec equations)

i need to turn that equation into

m/z = r2B2e/2V

(here the r and B are squared, but the V is two V)

Thanks

2007-12-22 13:14:20 · 5 answers · asked by Anonymous in Mathematics

2007-12-22 13:06:49 · 3 answers · asked by Uttam S 2 in Zoology

OK, so say i have to administer a medication to someone in the dosage of .2mg. It is only available in .4mg/ml. What is the correct dosage, please help me through it so that i can figure it out on my own next time, thanks!! :)

2007-12-22 13:03:28 · 8 answers · asked by AJ 2 in Medicine

2007-12-22 13:02:25 · 9 answers · asked by ben t 3 in Physics

my cousin wants to know if there is a specific term for someone who is afraid of ice cream and if there is what is it?

2007-12-22 12:58:00 · 2 answers · asked by Anonymous in Other - Science

2007-12-22 12:54:03 · 3 answers · asked by deva 6 in Earth Sciences & Geology

2007-12-22 12:53:46 · 5 answers · asked by Gopi K 2 in Zoology

me, my sister , and my mom share a bunk bed. my mom and sister sleeps on the bottom while i sleep on the top. i discovered there are lots of mold on the ceiling and it is right on top of where i sleep! so im inhaling those mold in my lungs!! i guess it doesnt harm my health that much but i cant sleep knowing that they are there! how do i get rid of them? please help. i want them gone before tonight

2007-12-22 12:52:59 · 7 answers · asked by Anonymous in Other - Science

a. the hot and neutral are wired forwards
b. the ground and neutral are wired backwards
c. polar bears walk backwards
d. the hot and neutral are wired backwards

i picked d am i right?

2007-12-22 12:51:33 · 4 answers · asked by onyx 1 in Engineering

2007-12-22 12:44:25 · 1 answers · asked by :) 2 in Biology

Will it still work the same to make a smoke bomb?

2007-12-22 12:40:27 · 2 answers · asked by Anonymous in Chemistry

if the higher mountain in windsor...
is that higher than Blue mountain?

2007-12-22 12:39:13 · 2 answers · asked by Anonymous in Geography

Does anyone hear know how to prove that 0.99999999999999999999999... = 1 with sequences and series? I used to remember but I cannot seem to find the answer anywhere. This isn't for a class or anything so please give a direct answer if possible. Thank you.

2007-12-22 12:31:09 · 9 answers · asked by Anonymous in Mathematics

Use the power rule and the power of a product or quotient rule to simplify the expression.
(4a)2

A 8a
B 16a2
C 8a2
D 16a


Simplify the following.
-5y0

A 0
B -4
C 1
D -5

Simplify the following.
(-6z2)(2z3)

A 12z6
B 8z5
C -12z5
D -12z6

2007-12-22 12:30:48 · 7 answers · asked by Anonymous in Mathematics

2007-12-22 12:30:44 · 4 answers · asked by MTGR 1 in Chemistry

2007-12-22 12:30:36 · 10 answers · asked by Anonymous in Astronomy & Space

Use the power rule and the power of a product or quotient rule to simplify the expression.
(4a)2

A 8a
B 16a2
C 8a2
D 16a


Simplify the following.
-5y0

A 0
B -4
C 1
D -5

Simplify the following.
(-6z2)(2z3)

A 12z6
B 8z5
C -12z5
D -12z6

2007-12-22 12:30:15 · 6 answers · asked by Anonymous in Mathematics

i do i saw one tonight

2007-12-22 12:27:11 · 12 answers · asked by Justin P 1 in Astronomy & Space

what it is , as the scienctific definiton

2007-12-22 12:25:49 · 4 answers · asked by manny 1 in Weather

How much of lost energy would be expected on this experiment?

Let's say you have a tunnel of 1 and 10mm diameter at 50m of sea level. The length of the tunnel is 1m. At the beginning of the tunnel but 50mm inside you have 1m diameter 2 blades aircraft propeller turning at the speed of 100kph. The propeller is set up on the tunnel as you would have set up on your small aircraft, meaning to pull the aircraft forward.

Behind the propeller another propeller (exact the same propeller as the first) so that the air being forced through the tunnel would spin the propeller. The distance between the two propellers is 300mm.

Would the second propeller spin as fast as the operating propeller (motorised)? No, certainly not you would say because of friction, heat and maybe other factors as well.

How much of energy wasted are we talking about here? what would be the difference in speed between the two propellers? what speed would you expect the second propeller to spin?

2007-12-22 12:24:30 · 3 answers · asked by mades 2 in Physics

We saw a large object leaving a flaming trail heading towards earth and were trying to figure out if it was an asteroid or shuttle reentry, etc.

2007-12-22 12:19:13 · 5 answers · asked by Jeff O 1 in Astronomy & Space

2007-12-22 12:17:45 · 2 answers · asked by nadji_feissali 1 in Botany

if the world were square. what corner would you live in

2007-12-22 12:09:59 · 13 answers · asked by Anonymous in Mathematics

2007-12-22 12:06:01 · 17 answers · asked by Rachel T 1 in Mathematics