Science & Mathematics - 13 January 2007

2007-01-13 13:42:02 · 9 answers · asked by Princess Jasmine 2 in Mathematics

I like this question. Nobody knows the answer but me.

2007-01-13 13:41:10 · 13 answers · asked by wwwwwwwfe 1 in Physics

2007-01-13 13:40:54 · 30 answers · asked by Anonymous in Other - Science

-2/15,5/9,1/8,-1/9,2/7

2007-01-13 13:35:00 · 14 answers · asked by Nicole S 1 in Mathematics

2007-01-13 13:34:08 · 7 answers · asked by SatanicYoda 3 in Other - Science

What type of compound is CuSO4 (ionic, covalent...)? Write an equation for the process of solid CuSO4 dissolving in water

2007-01-13 13:32:07 · 7 answers · asked by Rubidium S 1 in Chemistry

2007-01-13 13:30:15 · 2 answers · asked by shariff m 1 in Chemistry

if we erase chemicals and all other out side agents, could the reasion the human race has genitic defects be because of incest?

i am not trying to be sick just asking a simple question.

i ask because back thousands of years ago there were less humans and thus it would take less time for you to have sex with a relative (a few hundred times removed cousin).

2007-01-13 13:26:44 · 13 answers · asked by Anonymous in Biology

2007-01-13 13:25:57 · 16 answers · asked by sano 1 in Earth Sciences & Geology

1) Aluminum sulfate hydrate Al2(SO4)3.xH2O contains 13.63% Al by mass. Calculate x, that is, the number of water molecules associated with each Al2(SO4)3unit.

2) What would happen if a small amount (0.2ml) of water is added to 10.0g of solid anhydrous CuSO4? What happens to the color? Write an equation that describes this process. How is this different from the experiment that you did in the simulation?

2007-01-13 13:24:15 · 3 answers · asked by Rubidium S 1 in Chemistry

My physics teacher put water in a flask on a burner and when it reached boiling he took it off the burner left it on the counter for a couple seconds then put a rubber stopper on top of it.
Then he flip it upside down onto a platform that held it in place.

Then he placed ice cubes on the top of the flask and it started boiling.

2007-01-13 13:22:58 · 6 answers · asked by Karim S 2 in Physics

2007-01-13 13:21:47 · 15 answers · asked by thesunshineking 2 in Weather

(gases can't be seen)

2007-01-13 13:18:57 · 15 answers · asked by El Nino 2 in Chemistry

A force of 500 nextons is exerted on the rope of block and tackle, and the rope is pulled 9 meters, lifting a weight of 3,000 newtons 1.8 meters.Show all work when answering the following questions...

1a. What work was put into the machine?
1b. What was the work output?
1c. What was the efficiency?
1d. What was the Theoretical Mechanical Advantage?
1e. What was the Actual Mechanical Advantage?

Note some useful equations...
a. Work Input=FiDi
meaning : = initial force* initial distance , which is measured in (N*m) or Joules

b. Work Output= Fo*Do, meaning : = weight *distance of weight moved, which is measured in (N*m) or Joules

c.. Efficiency= work output/work input *100%

d. Mechanical Advantage= Resistance (load)/ Effort(force)
which is usually >1

2007-01-13 13:14:33 · 2 answers · asked by dreamz 4 in Physics

2007-01-13 13:13:39 · 3 answers · asked by Anonymous in Mathematics

The professor's assistant (flying robot)keeps on floating around collecting the information for him. Also, it monitors as a security.
If we could make one like that i feel that could be converted in to a dust extractor for houses(especially residences in indian cities)
Floating around inside house purifying air around. Can we develop this further.

2007-01-13 13:12:58 · 5 answers · asked by babu n 2 in Engineering

2007-01-13 13:08:52 · 3 answers · asked by Ethan S 2 in Mathematics

Isn't H2O (water) necessary as well?

2007-01-13 13:08:11 · 6 answers · asked by P!NK 3 in Other - Science

the answer should come in an essay form of 500 words

2007-01-13 13:07:11 · 14 answers · asked by professor 2 in Physics

One of my 6th graders asked this, after doing a lesson on acids and bases. I didn't know, so I thought I would ask. She says that because chocolate is slippery when wet and can taste bitter, she says it is a base. Is she right?

2007-01-13 13:06:42 · 3 answers · asked by loriahaven 2 in Chemistry

CrCl3, FeCl3, CoCl2, CuCl2, ZnCl2

I think it may be Zn, but I'm not sure. Could someone tell me which, and why?

2007-01-13 13:04:10 · 2 answers · asked by Neodudeman 1 in Chemistry

2007-01-13 13:03:56 · 9 answers · asked by David W 1 in Zoology

Had a road trip a few years back and saw some truly gigantic tumble weed taller than a car "tumbling" across the high way, and was deeply fascinated by their unusual structure. Before I only see them in National Geographic. Can anyone tell me as much info as possible?? Thanks

2007-01-13 13:02:39 · 18 answers · asked by Kaien かいえん 4 in Botany

I guess it's around 21 years of age.

This seems to be the point at which our development moves from one of growth, improvement and renewal to the inevitable gradual decline and decay into 'old age'.

So what 'switch is pushed at this point in our DNA?

What changes us from a blossoming flower, to a shriveling weed?

Or is the truth that we simply don't know? That this is the holy-grail the human race has searched for for centuries?

Also, does this decay-mechanism play an important part in evolution. It seems to me that the faster an organism dies after reproducing, then the better, as the next generation always presents the possibility it may produce an evolutionary 'jump', that will greatly benefit the species?

As an example, small songbirds with a life-span of around 3 years, rarely die of cancer, yet it is a common killer anongst humans.

In forwarding medical research therefore, are we in conflict with the natural order of things?

2007-01-13 13:02:16 · 6 answers · asked by THINKER 2 in Biology

2007-01-13 13:01:51 · 3 answers · asked by Anonymous in Mathematics

How do i make a animal cell from Cake ? and would it be best if i bought the cake or make it ?

2007-01-13 13:01:35 · 2 answers · asked by Anonymous in Biology

after finishing two or three sums in maths i check my answers.
is it good?? is it a bad habit to check answer after doing?

2007-01-13 13:01:18 · 39 answers · asked by X&Y 1 in Mathematics

1. The top pulley hanging from the support produces only a change in direction of the effort force and not any mechanical advantage. Explain.

2. Determine the relationship between the number of strands supporting a block and tackle and its mechanical advantage.

note that...
mechanical advantage=Resistance(load)N/Effort(force)
which is usually>1

2007-01-13 12:58:43 · 2 answers · asked by dreamz 4 in Physics

I do not know how to know the temperature by celsius, I only know Fahrenheit........

2007-01-13 12:55:46 · 5 answers · asked by Carol 2 in Weather

It isn't bad here 48F

2007-01-13 12:49:10 · 14 answers · asked by kimbo 1 in Weather