Science & Mathematics - 26 October 2006

2006-10-26 17:27:12 · 18 answers · asked by Anonymous in Physics

a cooing noise behind my house which is heavily wooded area. I live in Mississippi and I have no idea what animal this could be. My mother said she heard a similar sound one night. Any ideas what it could be.?

2006-10-26 17:27:12 · 7 answers · asked by lucy02 6 in Zoology

2006-10-26 17:25:55 · 1 answers · asked by don d 1 in Engineering

The area of the top of a rectangular box is 324 in. squared, the area of the front of the box is 135 in.sq. and the area of the end is 60 in.sq. What is the volume of the box? THANK YOU

2006-10-26 17:23:36 · 3 answers · asked by Anonymous in Mathematics

2006-10-26 17:23:27 · 3 answers · asked by shana h 1 in Mathematics

2006-10-26 17:20:45 · 3 answers · asked by kim n 1 in Chemistry

I'm doing a project and NO ONE can answer this question!!!! If I put baking soda and salt into boiling water it makes bubbles. Why?? IS there something in the Baking Soda and Salt that makes it act this way?? Please help me. =)

2006-10-26 17:20:16 · 3 answers · asked by Anonymous in Chemistry

A systems analyst needs to summarize 9000 documents. The docs describe end-user (non)usage and (dis)satisfation. Usage is reported as teh number of hours per week; the populationvariance for usage is 400 hours hours. Satisfaction is reported as satisfied or non-satisfied. The analyst wants to avoid sampling errors if possible, and does not want to review all 9000 docs unless required.

1) How many docs should the analyst select to obtain 99.7% certainty for estimating the number of hours of usage if the acceptable error of the estimate is 2 hours?

2) For the sample size in 1) explain 2 specific methods for selecting the desired sample.

3) If the analyst believes (believes, being key) one third of the documents suggests a variation from normal user satisfaction how many documents should the analyst select to estimate the percentage of dissatisfied users at the 99.7% certainty level if the acceptable error is 0.1?

2006-10-26 17:18:07 · 1 answers · asked by Anonymous in Mathematics

A small metal ball is suspended from the ceiling by a thread of negligible mass. The ball is then set in motion in a horizontal circle so theat the thread describes a cone. The acceleration of gravity is 9.8 m/s2. The angle is 26 degrees. The distance is 1.7m and the mass is 6.2 kg.
a)What is the speed of the ball when it is in circular motion ?
b)How long does it take T period for the ball to rotate once around the axis ?

2006-10-26 17:16:50 · 2 answers · asked by Anonymous in Physics

What does a cope mean in the Steel industry?

2006-10-26 17:16:33 · 1 answers · asked by Jason F 4 in Engineering

2006-10-26 17:15:58 · 6 answers · asked by david c 1 in Geography

I think it lives in the ocean?

2006-10-26 17:15:48 · 3 answers · asked by Anonymous in Zoology

Is it 2.5 or.25?

2006-10-26 17:15:25 · 14 answers · asked by gerbil_girl_11 2 in Mathematics

when I say bees, i'm not referring to a specific kind of bee. I mean all the bees total on the whole planet.

2006-10-26 17:10:13 · 5 answers · asked by Anonymous in Zoology

A piece of iron (400. g) is heated in a flame and then plunged into a beaker containing 1.00 kg of water. The original temp of the water was 20.0 degrees Celcius, but it is 32.8 degrees after the iron bar is put in and thermal equilibrium is reached. What was the original temp of the hot iron bar?
equation: mass * enthalpy * change in temp
water: 4.184 J/(g*C)
iron: 0.451 J/(g*C)

I can calculate the heat of the water, but when I try to set up the equation for the iron, I get two variables:
q(Fe) = 400. g * .451 J/(g*C) * (32.8 C - initial temp)

did i do something wrong? or how can i solve this?

2006-10-26 17:09:44 · 1 answers · asked by Anonymous in Chemistry

I am currently attending a state university for electrical engineering tech degree. I am not very happy with the university so far and was thinking of going to a community college. The community college actually has a better engineering programs, but the question I have is when I actually finish my degree will employers look to see where I got my degree? Would I be hurting myself with a degree at a community college over a state university.

2006-10-26 17:09:42 · 7 answers · asked by nhale24 1 in Engineering

2006-10-26 17:07:58 · 6 answers · asked by Anonymous in Astronomy & Space

2006-10-26 17:06:16 · 8 answers · asked by Anonymous in Zoology

what about the ways you think about eukaryotic cells?

2006-10-26 17:02:19 · 3 answers · asked by Anonymous in Biology

2006-10-26 16:59:26 · 8 answers · asked by Anonymous in Earth Sciences & Geology

what is Nanochloropsis Octula ?? using what type of agar n temperature to culture it??

2006-10-26 16:52:22 · 1 answers · asked by qiqi 1 in Biology

2006-10-26 16:50:06 · 4 answers · asked by heckyealevel1foreverlol 2 in Mathematics

???

2006-10-26 16:48:08 · 2 answers · asked by Anonymous in Biology

2006-10-26 16:43:36 · 5 answers · asked by Anonymous in Physics

What traits do you think will humans lose in the next 10 million years (genetically)? Will there be any mutations? Do you think there is a certain population on earth living in a certain geographic region whom can end up going through certain genetic transformations as a result of being on the same isolated (island for example) region over an extended period (millions of years). Could earth be an isolated region where the human species have evolved into what they are right now? Yes I have asked too many questions but I dare you to spend time thinking about a logical answer ( if you can come up with one)?

2006-10-26 16:39:02 · 15 answers · asked by Anonymous in Biology

2006-10-26 16:38:43 · 6 answers · asked by Anonymous in Mathematics

hey i'm a sophmore in AP Biology, i found the biochemistry beginning to be really easy, but i didn't get the nerve signaling and action potential part at all, i even flunked the test (15/31) does anyone have a good explanation or a good website that can explain it in simplistic words???

2006-10-26 16:36:55 · 2 answers · asked by oh my god 2 in Biology

please i really need this info

2006-10-26 16:33:12 · 4 answers · asked by michael_gdl 4 in Geography

Ex: 1-propanol
2-propanol

2006-10-26 16:33:10 · 5 answers · asked by ChaseMakesMeSmile 2 in Chemistry

2006-10-26 16:33:00 · 1 answers · asked by Anonymous in Engineering