Science & Mathematics - 6 February 2007

I know there's some bio buffs out there...!

2007-02-06 13:12:48 · 2 answers · asked by saurabh523 2 in Medicine

2007-02-06 13:12:28 · 7 answers · asked by Anonymous in Weather

Consider the simple first-order reaction, A ==> products. The initial concentration of A is 8.213M. After 10.285 seconds have elapsed, the concentration of A is 2.443M. Calculate the half-life (in seconds).

Error tolerance: ±0.5%

2007-02-06 13:11:53 · 1 answers · asked by da_bigunit 1 in Mathematics

Sketch the graph of the inequality

y-x<-2

2007-02-06 13:11:47 · 4 answers · asked by Orange? 4 in Mathematics

an essential piece of evidence is locked in a waterproof, unbreakable box. No key is available. How will you retrieve the piece of evidence without destroying it along with the box

2007-02-06 13:11:01 · 4 answers · asked by krisbohanon 2 in Other - Science

2007-02-06 13:10:47 · 2 answers · asked by Deb or Bob S 1 in Chemistry

2007-02-06 13:08:32 · 2 answers · asked by Kevin G 2 in Botany

the force required to keep the puck sliding at constant velocity is ?

2007-02-06 13:08:28 · 3 answers · asked by Anonymous in Physics

i have read from internet, and know that Lineweaver-Burk Plot will suggest some inaccuracy in the determination of the Vmax and Km, but why we still use it, i think that it must have some advantage to use Lineweaver-Burk Plot. so need some one to tell me? sorry my english is not good enough.

2007-02-06 13:07:26 · 1 answers · asked by teck kim 2 in Chemistry

2007-02-06 13:04:45 · 5 answers · asked by Kevin G 2 in Botany

Can someone explain (in simple flok english, please) this whole dominante/recicive gene thing?? What are the chances of getting a R gene? A D gene? What are the D/R genes? Is there a Idiot gene??

2007-02-06 13:04:40 · 8 answers · asked by serenityfan76 3 in Biology

any would be great =)

ribosomes.
vacuole.
endoplasmic reticulum.
cytoplasm.
golgi body.
centrioles.
nuclear membrane.
nucleus.
nucleolus.
chromatin.
nucleoplasm.
lysosomes.
cell wall.
chloroplast.

kaythanks. ♥

2007-02-06 13:02:44 · 9 answers · asked by Brandi// 1 in Biology

2007-02-06 13:02:36 · 2 answers · asked by Anonymous in Engineering

The relative humidity of air is ________ dependent.

2007-02-06 13:02:25 · 1 answers · asked by Justin 6 in Weather

I would like to estimate the age of some woodlands near my home. The trees arent that big (Not sure if that always makes a diffrence)and im not sure what kind they are. Its a hillside woodland close to a river. Any tips on Identifying young woodlands are appreciated. Thanks

2007-02-06 13:02:23 · 5 answers · asked by rock 3 in Biology

Complete the equation.
Carbon 14 undergoes radioactive decay to become nitrogen- 14.

14
C-----> ? + ?+?
6

is radioactive decay an alpha or what?

2007-02-06 13:01:41 · 1 answers · asked by asif7083 2 in Chemistry

Aren't they put off by the fact that they look so hairy and wrinkly?

2007-02-06 13:00:45 · 11 answers · asked by musutut 1 in Zoology

what planet are we on?

2007-02-06 13:00:28 · 8 answers · asked by Anonymous in Astronomy & Space

In moving from 20 degrees to 50 degrees north latitude along a line of longitude I moved 2,000 miles. The earth's circumference is ____________miles.

2007-02-06 12:59:11 · 3 answers · asked by bookworm87 4 in Astronomy & Space

One solution is 18% insecticide and another is 30%. How many liters of each are needed to make 28 liters of 25% insecticide?

i need to know how to solve it step by step

thank you

2007-02-06 12:59:05 · 5 answers · asked by *blonde*star* 1 in Mathematics

Susie is planing a circular flower bed with a radius of 3 1/2 feet. She plans to surround it with wire fencing that costs $0.89 per foot. How much does Susie need to spend on fencing?

2007-02-06 12:59:05 · 3 answers · asked by Anonymous in Mathematics

2007-02-06 12:59:00 · 5 answers · asked by elegant_disaster 1 in Chemistry

I don't know how to do this problem.
Right now, we are doing a section of Trig.
--->
Find the length of the apothem of a regular pentagon that has a perimeter of 50 cm.

2007-02-06 12:58:53 · 2 answers · asked by ♪ ξιиsтєιи ♪ ♪ ¢σмρℓєx ♪ 4 in Mathematics

I have a question on my bio hw. it says What is the ratio of purines to pyrimidines xD i don't know what purines and pyrimidines mean. help me? =[

2007-02-06 12:58:51 · 4 answers · asked by Nina N 1 in Biology

2007-02-06 12:57:10 · 3 answers · asked by c 2 in Earth Sciences & Geology

Which plays a greater role in the movement of phloem sap: Push or pull? What causes this?

2007-02-06 12:56:22 · 2 answers · asked by Anonymous in Botany

2007-02-06 12:55:44 · 2 answers · asked by Juli H 1 in Mathematics

A scientist adds a water-soluble inhibitor of photosynthesis to the roots of a plant. However photosynthesis is not affected by addition of the inhibitor in this manner. Why?

2007-02-06 12:55:39 · 1 answers · asked by Anonymous in Botany

what happens to its molecules when pressure is put on it?? Does it decrease and is so why? if it doesn't why?? if can please give websites for me to look at.

2007-02-06 12:54:17 · 4 answers · asked by Kate L 1 in Physics

Can you please help me? I dont get how to figure it out!!

find the surface area of a triangular prism whose bases are right triangles with legs 6 feet and 8 feet and height is 10 feet.

2007-02-06 12:54:06 · 2 answers · asked by Anonymous in Mathematics