Science & Mathematics - 11 January 2007

clams feed by filtering water which flows across their nephridia

2007-01-11 11:47:26 · 15 answers · asked by Anonymous in Biology

2007-01-11 11:46:08 · 6 answers · asked by Anonymous in Earth Sciences & Geology

2007-01-11 11:45:52 · 4 answers · asked by notaloser321 1 in Engineering

2007-01-11 11:45:21 · 2 answers · asked by Anonymous in Biology

2007-01-11 11:45:20 · 1 answers · asked by Forest Fest 2 in Biology

I have questions and i need help I was absent when my class did this and no1 has the notes and i've looked everywhere to find it on the internet!!!!!!


1. why is the actual mechanical advantage of a machine different from a machines ideal mechanical advantage?

2. What do you need to know to calculate the effiency of a machine?

3. Can a machine increase both force and distance? explain.

4. Make a comparison table: one increases force and one that increase distance. For each machine compare x and y force and work.

2007-01-11 11:45:18 · 2 answers · asked by Random is my passion 4 in Engineering

2007-01-11 11:44:19 · 3 answers · asked by Anonymous in Physics

a particle moves along a line so that its postion at any time t is greater than or equal to 0 is given by the function

s(t)=t^2-3t+2,

where s is measured in meters and t is measured in seconds

a) find the displacement during the first 5 seconds

b) find the average velocity during the first 5 seconds

c) find the instantaneous velocity when t =4

d) find the acceleration of the particle when t =4

e) at what values of t does the particle change direction?

f) where is the particle when s is a minimum?

2007-01-11 11:41:28 · 5 answers · asked by carrotrabbitzz 1 in Mathematics

2007-01-11 11:40:48 · 7 answers · asked by mrlabc123 2 in Physics

I need it as soon as possible!
I need the site.
No Joke!!!

2007-01-11 11:40:27 · 2 answers · asked by funny1jun 2 in Zoology

I need it as soon as possible!
I need the site.
No Joke!!!

2007-01-11 11:40:08 · 1 answers · asked by funny1jun 2 in Zoology

2007-01-11 11:39:49 · 2 answers · asked by 1234 1 in Biology

I need it as soon as possible!
I need the site.
No Joke!!!

2007-01-11 11:39:26 · 2 answers · asked by funny1jun 2 in Zoology

I need it as soon as possible!
I need the site.
No Joke!!!

2007-01-11 11:39:05 · 2 answers · asked by funny1jun 2 in Zoology

Does it all have to do with the atoms that are in it?

2007-01-11 11:38:11 · 4 answers · asked by bluefreek07 2 in Other - Science

2007-01-11 11:37:25 · 6 answers · asked by Joseph D 2 in Mathematics

I’ve always wondered if it is possible that everyone might perceive colors in a different way. That is, we are all taught as a child that when we see a certain shade or hue, it’s called “red.” But what if, when I look at an apple and see what I know as red, it looks like what you consider “blue.” So if we both closed our eyes, pictured the apple, and our minds could somehow swap images... yours might appear purple to me.
While the object is reflecting the same pigments, maybe each individual’s eyes or brain compute them in different ways? Can anyone give evidence for why this is or isn’t plausible? Sorry if it sounds crazy, just wondering. =]
(i'd be just as happy to hear opinions as scientific explanations. there's no wrong answer, i just want to hear what people have to say.)

2007-01-11 11:37:06 · 21 answers · asked by alaina 2 in Other - Alternative

2007-01-11 11:36:54 · 5 answers · asked by Anonymous in Medicine

i have to create a periodic table that is based on ANY topic(all appropriate). items in the verticle columns must be similar in some manner and have some gradual change as you move down the family. there should be a pattern, or trend, in the change of charcteristics as you move across a row/period. so the entire project is basically an organized chart that consists of specific patterns or trends, based on a particular subject.

2007-01-11 11:36:36 · 5 answers · asked by unique2thextreme 2 in Chemistry

i am revising for my university exam and am really struggling getting my head round newtons law of gravitation need to work out how to use the formular can anyone help ?????

2007-01-11 11:36:23 · 12 answers · asked by Anonymous in Mathematics

from this question "let no one enter who does not know mathematics".

2007-01-11 11:36:12 · 4 answers · asked by tonya4w 1 in Mathematics

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2007-01-11 11:36:09 · 6 answers · asked by genius 2 in Mathematics

2007-01-11 11:36:01 · 10 answers · asked by jedi_prabhu 1 in Mathematics

from this question "let no one enter who does not know mathematics".

2007-01-11 11:35:57 · 2 answers · asked by tonya4w 1 in Mathematics

2007-01-11 11:35:12 · 1 answers · asked by tri d 1 in Biology

2007-01-11 11:35:12 · 3 answers · asked by Anonymous in Botany

Any example would be great!

2007-01-11 11:33:31 · 6 answers · asked by Love2teach 4 in Chemistry

Do you guys know how to make a can that when you roll it forward, it'll by itself roll back to you? Please help me.
Thank you

2007-01-11 11:33:04 · 3 answers · asked by gundamzoids0116 1 in Other - Science

to be specific .4285...

2007-01-11 11:32:24 · 3 answers · asked by blackcelt22 1 in Mathematics

2007-01-11 11:31:45 · 14 answers · asked by solarizedmonkeyman 2 in Mathematics