Science & Mathematics - 16 December 2007

2007-12-16 19:00:04 · 9 answers · asked by Anonymous in Zoology

2007-12-16 18:54:27 · 10 answers · asked by Anonymous in Earth Sciences & Geology

as in maths

2007-12-16 18:54:13 · 16 answers · asked by Anonymous in Mathematics

2007-12-16 18:53:02 · 10 answers · asked by Jean S 1 in Mathematics

2007-12-16 18:48:48 · 6 answers · asked by mit 1 in Chemistry

Can someone please tell me the answers to these:
1) – 3 x 14 – 8 ÷ 22 + (5 – 7)3 = ???
2) What is the square root of 2.52 - 0.72 ?

Thanks!

2007-12-16 18:46:33 · 2 answers · asked by sarah.miller8 1 in Mathematics

g(x) = 3x^2 + 2x-1 / x^2 -4

There are vertical asymptotes at:
a. x = 2 and x = -2
b. x = 4 only

There is a horizontal asymptote at:
a. y = -1
b. y = 3

2007-12-16 18:36:16 · 4 answers · asked by Anonymous in Mathematics

2007-12-16 18:31:10 · 3 answers · asked by r c 1 in Mathematics

Then the limit is unique. Can anyone help with this one?

2007-12-16 18:15:18 · 2 answers · asked by Anonymous in Mathematics

The bones in a skeliton of a Dolphin.

2007-12-16 18:03:00 · 6 answers · asked by michael_powell6 1 in Zoology

Simplify the expression by distributing and combining like terms:
-2(x-3) + 4(x+7). pleaseee does anyone know the answer?

2007-12-16 17:59:14 · 22 answers · asked by Anonymous in Mathematics

The Big Pot of Soup As part of his summer job at a resturant, Jim learned to cook up a big pot of soup late at night, just before closing time, so that there would be plenty of soup to feed customers the next day. He also found out that, while refrigeration was essential to preserve the soup overnight, the soup was too hot to be put directly into the fridge when it was ready. (The soup had just boiled at 100 degrees C, and the fridge was not powerful enough to accomodate a big pot of soup if it was any warmer than 20 degrees C). Jim discovered that by cooling the pot in a sink full of cold water, (kept running, so that its temperature was roughly constant at 5 degrees C) and stirring occasionally, he could bring the temperature of the soup to 60 degrees C in ten minutes.
How long before closing time should the soup be ready so that Jim could put it in the fridge and leave on time ?

2007-12-16 17:54:35 · 2 answers · asked by Anonymous in Physics

Problem #1-find the equation of (0,-3), (3,2),(6,7) and this one is making me nuts too!!
Problem #2-Graph y<-2/3rds x +4 or explain coordinants and if greater or less than or equal too-have to say yes or no-but i'm insane from these problems....thanks soo much...

2007-12-16 17:52:51 · 2 answers · asked by hipmamma25 1 in Mathematics

find a continuous function f in Lp space (p=1) and f does not have compact support

2007-12-16 17:40:35 · 2 answers · asked by N 1 in Mathematics

2007-12-16 17:40:01 · 2 answers · asked by Anonymous in Mathematics

2007-12-16 17:34:29 · 13 answers · asked by Anonymous in Mathematics

2007-12-16 17:28:13 · 8 answers · asked by Anonymous in Zoology

2007-12-16 17:26:58 · 6 answers · asked by larry s 2 in Zoology

we tested glucose and placed different amounts of yeast in the glucose and found that the more yeast you add, the more carbon dioxide gas you will have. why is more yeast able to produce more carbon dioxide through aerobic respiration?

2007-12-16 17:22:58 · 3 answers · asked by kfgndfngkdfng 2 in Biology

heya everyone..
in class 10 syllabus..physics...we got Electricity chapter...

in that one...we have two-three formulas of power..

power = I*I*R
and POWER = V*V / R

so my quesion is...in one case..power is directly proportional to R(resistance) and in second...itz inversely proportional to R...

howz it possible???...plzzz answer asap!!!

2007-12-16 17:20:08 · 3 answers · asked by nikita 2 in Physics

I'm doing a project on how nuclear science is applied to agriculture. I would appreciate any and all information.

2007-12-16 17:16:32 · 6 answers · asked by Gregory H 3 in Agriculture

2007-12-16 17:13:09 · 3 answers · asked by MareK D 1 in Mathematics

2007-12-16 17:12:34 · 7 answers · asked by Aint No Bugs On Me 4 in Biology

Ksp = 7.9 x 10^-27

Cadmium(II) hydroxide is added to a one liter solution that has sodium hydroxide, and thus a pH of 12 (so obviously pOH=2).

what is the approximate molar concentration of cadmium ions in this solution?

2007-12-16 17:10:46 · 1 answers · asked by Sage 1 in Chemistry

hey guys, I need help ASAP! this stuff is due 2morrow, please help!


1. 40.2 g sample of metal is heated to 99.3 C and then placed in a calorimeter containing 120. g of water ( s= 4.184 J/gC) at 21.8 C. the final temp of the water is 24.5 C which medal was used?

b. Iron ( s=0.45 J/gC)
c. Copper ( s=.20 J/gC)
d. Lead ( s=.14 J/gC)
e. Silver (.13 j/gC)


2. consider the following:
2A -> 1/2 B + C change in heat = 5 kJ/mol
5/2 B + 4C -> 2A+ C+ 3D change in heat = -15 kJ/mol
E + 4A -> C

Calculate change in heat for: C-> E + 3D
a. 0 kJ/mol
b. 10
c.-10
d.-20
e20 kJ/mol

2007-12-16 17:06:24 · 2 answers · asked by whosethatgurl101 2 in Physics

2007-12-16 17:02:51 · 26 answers · asked by Anonymous in Paranormal Phenomena

What are the ratios for the following?

1)water to manganeese(II) chloride in the reaction: HCl + MnO2 ==> H2O + MnCl2 + Cl2
2)copper to iron in the reaction: Fe + CuSO4 ==> FeSO4 + Cu
3)iron to carbon dioxide in the reaction: Fe2O3 + CO ==> Fe + CO2
4)sodium to oxygen in the reaction: Na + O2 ==> Na2O

2007-12-16 16:58:37 · 3 answers · asked by mrxxbrian 2 in Chemistry

log4 (little 4 down) x = 3
a. 81
b. 64

log 9 (little 9 down) 27 = x
a. 3/2
b. - 3/2

2007-12-16 16:51:30 · 7 answers · asked by Jason S 1 in Mathematics

y = 10 t^6 − 3 √t + [9/t]

2007-12-16 16:51:24 · 3 answers · asked by rivergirl 1 in Mathematics

1) If the wavelength of light changes as light goes from one medium to another, while the frequency remains the same. If the wavelength is shorter in water than in air, than the following:

a) A certain blue-green light has a wavelength of 600 nm (6x10^-7 m) in air. What is its wavelength in water, where light travels at 75% of its speed in air? __nm

b)What is its wavelength in Plexiglas, where light travels at 67% of its speed in air?__nm

2007-12-16 16:50:52 · 4 answers · asked by TheLostOne 3 in Physics