Science & Mathematics - 11 February 2007

An anchor weighing 100 lb in water is attached to a chain weighing 3lb/ft in water. Find the work done to haul the anchor and chain to the surface of the water from a depth of 25ft.

Water density is 62.4 lb/ft(cubed)
work is force times by density
dunno if these will help

Thanx

2007-02-11 15:49:04 · 1 answers · asked by moooona1987 2 in Mathematics

2007-02-11 15:46:31 · 8 answers · asked by James Y 1 in Mathematics

I'm not sure but i think it's only 2000 stars- you can seen with the naked eye.

2007-02-11 15:44:53 · 8 answers · asked by 2 Minutes ago 1 in Astronomy & Space

I'm not sure but i think it's only 2000 stars- you can seen with the naked eye.

2007-02-11 15:44:32 · 2 answers · asked by 2 Minutes ago 1 in Astronomy & Space

2007-02-11 15:44:11 · 3 answers · asked by redqueen94 2 in Biology

In english please

2007-02-11 15:42:46 · 5 answers · asked by Anonymous in Biology

What is a bounded sequence?
What is a monotonic sequence?
What is the difference between the two?
How can you identify whether a sequence is bounded or monotonic?

2007-02-11 15:42:12 · 2 answers · asked by pharoah6905 2 in Mathematics

I'm working on a report for an Earth Science class on ground and surface water in the state of Colorado. However, all the data I've found regarding the percentages and numbers of people using ground water (and septic tanks) vs. city water (and city sewers)has been somewhat unreliable, does anyone have some reliable statistics, or know where I can find some? Thanks in advance. :)

2007-02-11 15:40:21 · 1 answers · asked by El Conejo 3 in Earth Sciences & Geology

Basicly just the question above.

What characteristic of bryophytes is responsible for their being so small? Explain.

I haven't been able to find an answer yet. The best thing I can come up with is that there so small because they dont have vasicular tissue, but I dont think that really answers it so please help!

~X_Agrona_X

2007-02-11 15:40:09 · 1 answers · asked by Silly_Smilly 3 in Botany

i just saw a question like this:

In a class there are 27 girls and 34 boys. In how many ways can you pick 2 boys and 2 girls to form a committe

Ok, it understand that A with B is the same as B with A. I just don't understand why you divided by 2. That part really confuses me. Can somebody help please??

2007-02-11 15:38:14 · 5 answers · asked by Ha!! 2 in Mathematics

2007-02-11 15:38:01 · 3 answers · asked by Anonymous in Biology

2007-02-11 15:35:09 · 3 answers · asked by Teresa S 1 in Zoology

2007-02-11 15:34:19 · 4 answers · asked by Anonymous in Biology

2007-02-11 15:34:18 · 1 answers · asked by sonu singh 1 in Astronomy & Space

2007-02-11 15:33:05 · 11 answers · asked by Anonymous in Earth Sciences & Geology

a.is vascular and the conifer is not.
b. produces seeds and the conifer's are not
c. seeds are enclosed in a fruit and the conifer's are not
d. has alternation of generation and the conifer does not
is c. the right answer ? help pls i am really confused !!!!
Thanks for your help.

2007-02-11 15:32:27 · 2 answers · asked by Anonymous in Botany

i like to design an automatic voltage regulator for a diesel engine as my project. i just need help for this. how can i design this? what r all the components i need for this? shortly i need the logic for this design? can any one help me?...

2007-02-11 15:31:03 · 4 answers · asked by anderson 2 in Engineering

x^2 - x + 6

2007-02-11 15:30:04 · 9 answers · asked by ¡Jessica! 4 in Mathematics

2007-02-11 15:28:12 · 6 answers · asked by Anonymous in Biology

2007-02-11 15:24:25 · 6 answers · asked by nileri_1 2 in Astronomy & Space

Specifically, how does it work for light? Does it need an aperture (small slit) to work?

2007-02-11 15:22:45 · 3 answers · asked by Angelfire 2 in Physics

2007-02-11 15:20:54 · 3 answers · asked by Anonymous in Engineering

1. In pea plants, tall (T) is dominant to dwarf(t). Show the cross between a heterozygous tall and a dwarf plant.

2. If 2 constricted pod plants are crossed what are the expected phenotypes of the offspring and in what proportion?

plz!!!!!!!!!!! anwer!!!!: (

2007-02-11 15:20:06 · 3 answers · asked by sung k 2 in Biology

2007-02-11 15:19:38 · 28 answers · asked by Anonymous in Paranormal Phenomena

thank you in advance.

2007-02-11 15:17:35 · 2 answers · asked by Anonymous in Mathematics

how do you do

log(base2) (3x+2) - log(base4) x = 3

2007-02-11 15:16:05 · 9 answers · asked by eeeek 1 in Mathematics

Tonight, I was looking through a 24 yr old telescope (mostly a conversation piece now). Last night, I tried to get a glimpse of Saturn.. no luck. After showing my wife a little bit about this telescope, we both started looking towards the brighest star in the sky. (we're in Northeast USA) Anyhow, there appeared to be a glare of sorts coming off an object in between us and the star-- almost the perfect glare that you would see from the reflection of a planet.

How likely is it that this actually WAS a planet? I'm very skeptical, but yet hopeful. Can anyone direct me to a website that might help me answer this question and others like it? This telescope was probably a lot of money 20-some years ago, but it's old, and some of the lenses are dirty... but would it have the ability to see planets like that?

Thx

2007-02-11 15:14:46 · 6 answers · asked by Anonymous in Astronomy & Space

i need steps

2007-02-11 15:14:13 · 10 answers · asked by sexy lady 1 in Mathematics

2007-02-11 15:13:25 · 12 answers · asked by Anonymous in Astronomy & Space

Help, I am having trouble setting up and solving this type of problem and I have a BUNCH to do, thanks!

2007-02-11 15:13:00 · 5 answers · asked by Anonymous in Mathematics