Science & Mathematics - 7 November 2007

2007-11-07 06:22:27 · 1 answers · asked by Dave H 2 in Biology

bacteria
animals
red and brown algae
insects
or fungi

2007-11-07 06:21:48 · 2 answers · asked by ArmageddonAngry 2 in Biology

A company wishes to design a rectangular box that will have a volume of 1125 cubic inches. The bottom and top of the box is a rectangles with a length which is 3 times the width. What should the dimensions be to minimize the surface area of the box?

2007-11-07 06:21:26 · 3 answers · asked by whoo_kidd1 1 in Mathematics

Find the value of x when y = 75.

Please could you give answer and help me out how to do it?

Many thanks

2007-11-07 06:20:05 · 5 answers · asked by Anonymous in Mathematics

2007-11-07 06:18:48 · 1 answers · asked by Anonymous in Biology

2007-11-07 06:16:29 · 1 answers · asked by Anonymous in Biology

How does this reaction affect other terrestrial organisms?

2007-11-07 06:15:04 · 1 answers · asked by Anonymous in Biology

help ! (round to your nearest tenth)
1. 747.32
2. 525.008
3. 301.44

2007-11-07 06:13:21 · 3 answers · asked by I walk,my walk & Talk,my talk 3 in Mathematics

for grade 9 science

2007-11-07 06:12:12 · 2 answers · asked by Anonymous in Biology

4Al 3O2 ---> 2Al2O3 How many moles of aluminum oxide can be formed from 5.2 moles of Al? What mass of Al is required to react with 6.00 moles of oxygen? What mass of Al oxide can be produced from 25.5 g of Al? if the actual yield is 42.5g what is % yield?

2007-11-07 06:10:40 · 5 answers · asked by Anonymous in Chemistry

this is for a chemistry I class at barton county community college it is due on monday november 12th 2007.

2007-11-07 06:09:45 · 1 answers · asked by jazminecrawford_1986 1 in Chemistry

Ok if you were to get all the cats in the world including cougars, lions, panthers, and domestic cats, and etc. and put them in a big battle field vs. every single dog in the world including grey wolves, dingo’s, and domestic dogs, and etc. Who would win in a battle cats or dogs????? Whenever you answer this question remember that there are 4 dogs to every cat…think about it.

2007-11-07 06:09:23 · 6 answers · asked by Thomas D 1 in Zoology

a)y=cos(3x) from x=0 to x=pi/6 about the x-axis

b)x=(1/9)(y^2 + 6)^(3/2) from y=1 to y=6 about the x-axis

c)x=sqrt(2y-y^2) from y=10/16 to y=17/16 about the y-axis

how do you go about doing these types of questions

2007-11-07 06:08:40 · 2 answers · asked by Anonymous in Mathematics

2007-11-07 06:08:28 · 3 answers · asked by not the smartest apple 1 in Astronomy & Space

2007-11-07 06:07:55 · 9 answers · asked by fastfredy0 2 in Weather

find a number in which the sum of the number is a minimum

2007-11-07 06:06:31 · 3 answers · asked by Chrisso 2 in Mathematics

Can someone help me with this question please? im having a hard time with these types of questions

Explain why the salt of a weak acid, as well as the acid itself, must be present to form a buffer solution.

1) actually, a weak aid by itself is a buffer, no salt is needed
2) the cation from the salt is needed to partially neutralize added acid.
3) the anion from the salt is needed to partially neutralize added base.
4) the cation from the salt is needed to partially neutralize added base.
5) the anion from the salt is needed to partially neutralize added acid.

2007-11-07 06:01:15 · 1 answers · asked by Anonymous in Chemistry

2007-11-07 05:53:53 · 2 answers · asked by Anonymous in Mathematics

Hi can someone help me with this question please?

We add enough base to a solution to cause the PH to increase from 7.5 to 8.5, this means that

1) OH- increases by 1 M
2) OH- increases by a factor of 8.5/7.5
3) H3O+ increases by 1 M
4) H3O+ increases by a factor of 10
5) OH- increases by a factor of 10

2007-11-07 05:51:16 · 1 answers · asked by Anonymous in Chemistry

Let's consider a triangle, ABC. Let's fix the points H and K on AB, and the points H' and K' on AC.
Let's link B to H and K, and C to H' and K', by segments: now, several triangles are obtained.
Does anyone know a formula to calculate the exact number of them? Could that formula give the right answer even in case of more than 2 points, fixed on AB and AC?

2007-11-07 05:51:07 · 1 answers · asked by Io S 2 in Mathematics

How many different birth orders are possible in which 2 of the children are affected and 1 is not?

2007-11-07 05:47:46 · 2 answers · asked by jelly 1 in Biology

How do I set this up, and can someone please walk me through the steps?

Lane invested $10,000, part at 15% and part at 14%. If the total interest at the end of the year is $1,430, how much did she invest at 15%?

2007-11-07 05:45:10 · 2 answers · asked by smiles4u 3 in Mathematics

2007-11-07 05:44:42 · 2 answers · asked by Anonymous in Chemistry

x^2+x+ *sqrt*[x^2+x] - 2 = 0

Am I to just arrange the data like this?

x^2 + x - 2 = - *sqrt* [x^2 +x]

2007-11-07 05:43:21 · 2 answers · asked by Anonymous in Mathematics

a car of mass 600 kg accelerates from rest to 8m/s in 40s.
i find that resultant force on car in 120N

so: if car is fitted with trailer mass 100kg, find time taken to accelerate to 8m/s.

assuming that F is 120N,
the textbook answer is:
F=ma
F=m x (v-u)/t

t=(mv-mu)/F
=(700x8)/120
= 46.7seconds.
what i need to understand is how F=ma got into that if the car is with a trailer. and why is there a momentum equation?

thanks T^T

2007-11-07 05:42:15 · 3 answers · asked by supernovastarfish 1 in Physics

how would i graph f(x)=-2log(x+5) without using a graphing calculator? how do i find the domain and range? can someone explain it to me clearly. is the domain {x\ x<4}?

2007-11-07 05:41:56 · 2 answers · asked by Anonymous in Mathematics

2007-11-07 05:39:26 · 1 answers · asked by gong 1 in Chemistry

I'm running a server at home. I've looked but I can't find these spark gap protectors! the one that I found had a amazingly unaffordable high price. So I'm thinking of making my own spark gap protector to be installed at my wall outlet before the PC (server).
Since we are dealing with lightning I'm thinking of placing the things that handle the spark inside an air tight glass bottle. The spark handling part would a be a simple mechanism, the Live and Neutral wires will placed with in <1mm of the ground wire (or even closer). Will the O2 inside the bottle be enough to handle a spark or will O2 cause problems, is O2 conductive enough? The Bottle containing the spark gap would be placed behind a breaker and 6A fuse. The contacts of the spark gap will be three iron rods (Live -> Ground <- Neutral).

Please help. Or may be I asked the electrical shop wrong. Is there some kind of model number or what I should be looking for? Btw this is for a AC 230V power line.

Please Help

2007-11-07 05:38:19 · 5 answers · asked by Anonymous in Engineering

Find the Y intercept the eqyation of the axis of symmetry x coordinate of the vertex. Make a tabel of values that includes the vertex, and graph it??

2007-11-07 05:36:16 · 8 answers · asked by Anonymous in Mathematics

2007-11-07 05:31:13 · 2 answers · asked by Anonymous in Biology