Science & Mathematics - 29 November 2006

A bowl is made by rotating y=ax² around the y-axis. (a is a constant)
a) The bowl is filled with water to a depth h. What is the volume of water in the bowl? (answer will have a and h)
b) what is the area of the surgace of water if the bowl is filled to depth h? (answer will contain a and h)
c) Water is evaportating from the surface of the bowl @ a rate proportional to the surface area, w/ proportionality constant k. Find a differential equation satisfied by h as a functino of time, t. (find eqn for dh/dt)
d) If the water starts @ depth h0, find the time taken for all the water to disappear.

2006-11-29 17:16:33 · 1 answers · asked by mathstinks 1 in Mathematics

Why is it important that ions being transported across a cell membrane be shielded from the interior of the lipid bilayer?

2006-11-29 17:13:35 · 3 answers · asked by james 2 in Biology

If we take Fe which is an atom and element for instance why do we need two different terms for the same thing?
Any help would be appreciated.

2006-11-29 17:10:26 · 3 answers · asked by Gideon 1 in Chemistry

They are as smaller than maggots but dark colored

2006-11-29 17:06:51 · 7 answers · asked by Paul S 2 in Biology

how can i syncronize them to make me dance with the mrs. i am thinking of useing a power booster to assist. anny sugestion s

2006-11-29 17:06:12 · 4 answers · asked by ? 2 in Biology

also does anyone know any pharmacy school in the us that is easy to get in to. I don't have good grades.

2006-11-29 17:05:07 · 2 answers · asked by KOISTAN 2 in Medicine

I heard beavers have a cloaca is that true if so that weird?

2006-11-29 17:03:32 · 5 answers · asked by ken31pop 2 in Zoology

2006-11-29 17:03:30 · 12 answers · asked by Anonymous in Mathematics

Write the equation of the line L satisfying the given geometric conditions.
L has y-intercept (0, 2) and is perpendicular to the line with equation 2x – 3y = 6.

I have no clue as to how to even attempt this. I've been trying a bunch of different ways to solve it (ways that the textbook shows me to), and I keep comming up with illogical solutions. Please help!

2006-11-29 17:02:45 · 5 answers · asked by glitteringfairywings 2 in Mathematics

Complete combustion of methane (excess oxygen) vs. incomplete combustion of methane (excess methane)

2006-11-29 17:00:52 · 2 answers · asked by abu ali 1 in Chemistry

2006-11-29 16:54:44 · 5 answers · asked by Anonymous in Mathematics

All about Earthquake in the Philippines

2006-11-29 16:53:09 · 16 answers · asked by MICHELLE C 1 in Earth Sciences & Geology

turn this into standard form: y= 4 + 1/5x
standard form is ax + by = c

2006-11-29 16:52:48 · 8 answers · asked by googoo 3 in Mathematics

Lab Objective: To determine the mass, in gramss, of your bag without counting all of the items individually. Rules-1.You may weigh up to 5 items that represent each bag. 2.Bags cannot be opened and counted indivdually.

2006-11-29 16:49:14 · 2 answers · asked by Anonymous in Mathematics

Given the revenue and cost functions R=28x-0.4x^2 and C=4x+10, where x is the daily production, find the rate of change of profit with respect to time when 25 units are produced and the rate of change of production is 6 units per day per day.

2006-11-29 16:46:25 · 2 answers · asked by Anonymous in Mathematics

I am working on a packet and that is one of the questions. I have tried to research the answer but i cannot seem to find a straightforward answer. If someone could please help me out, I would greatly appreciate it. Thanks!

2006-11-29 16:45:38 · 6 answers · asked by Chad 2 in Biology

2006-11-29 16:44:58 · 4 answers · asked by surina g 1 in Zoology

2006-11-29 16:44:04 · 1 answers · asked by ed s 1 in Medicine

I don't even really know what diagonals are-when the problem reads 'diagonals' it doesn't mean the slanted lines! Help? Thanks!

2006-11-29 16:43:18 · 10 answers · asked by Emily 2 in Mathematics

2006-11-29 16:33:56 · 3 answers · asked by perfectionistjc 2 in Chemistry

please help, im lost.

i tried the multiplicity rule and ended up with (x)(ex)(e^(ex-1)) + (e^(ex))(1) for the 1st derivative, which i think is wrong.

2006-11-29 16:33:27 · 4 answers · asked by dizzawg16 3 in Mathematics

One side has the number 31 and the other side has a 93 can anyone tell me what this may be thanks

2006-11-29 16:32:28 · 2 answers · asked by star_dust_76 1 in Medicine

I have read my text and have not been able to answer the following question. "Explain, using d orbitals, why Copper has so many colors?" The text has just confused me even further.

any and all help appreciated.

2006-11-29 16:31:29 · 2 answers · asked by roncho 4 in Chemistry

when a 28.7g sample of KI dissolves in 60.0g of water in a calorimeter, the temperature drops from 27.2 C to 13.2 C. Calculate (triangle) H for the process

KI(s) -> K+(aq) + I-(aq)

answer is supposed to be 20.3KJ

2006-11-29 16:30:55 · 1 answers · asked by julia k 2 in Engineering

2 (n - 3) = 12 - 8n

2006-11-29 16:29:54 · 14 answers · asked by Mell 3 in Mathematics

2006-11-29 16:29:23 · 4 answers · asked by sri ranj 1 in Astronomy & Space

2006-11-29 16:28:27 · 9 answers · asked by luisajg@sbcglobal.net 1 in Chemistry

2006-11-29 16:28:21 · 3 answers · asked by morales 1 in Physics

320=(0.4+2x)^2/(0.05-x)(0.04-x)
please show me the steps

2006-11-29 16:27:12 · 6 answers · asked by tanny 1 in Mathematics

3 salesmen go to a hotel - all there is is 1 room for $30. Each man chips in $10 and go to their room. The manager realizes he overcharged them by $5, so he gives it to his bellboy to take back to the men. Since they couldn't split $5, they gave the bellboy a $2 tip and kept $1 each. So, each man paid $9, which equals $27 and the bellboy has $2. $27 + $2 = $29. Where is the extra dollar?

2006-11-29 16:26:19 · 12 answers · asked by Anonymous in Mathematics