Science & Mathematics - 11 August 2007

2007-08-11 06:04:22 · 3 answers · asked by x0xshenanigans 1 in Mathematics

I added some vineger to a jam can and an iron nail and both started to rust.Explain?

2007-08-11 06:03:52 · 8 answers · asked by Adhir M 1 in Chemistry

How we get to know about the resistors either they are in series or in parallel, is there any easy method for that.

2007-08-11 05:58:56 · 3 answers · asked by Kasprov 1 in Engineering

I have heard a Meteor shower will happen some time this weekend. What is the name given it and why? When is it to happen? What part of the sky should I look for it?

2007-08-11 05:47:57 · 6 answers · asked by lizzywei 1 in Astronomy & Space

2007-08-11 05:45:21 · 4 answers · asked by shujen l 2 in Physics

help me find a way to generate all possible combinations in a 6/49 lottory please.

2007-08-11 05:44:48 · 9 answers · asked by ? 1 in Mathematics

An astrologer has suggested that I should wear a ring of unheated yellow sapphaire of about 7 ct. Where can I find an authentic yelloe sapphire and approximately how much would it cost? Thanks.

2007-08-11 05:42:53 · 4 answers · asked by Anonymous in Earth Sciences & Geology

I think f' means derivative rite? if it is then if we integrate to get f(x) it is Ln(x) which again doesn't satisfy the F(1) = 2. Help please. Thanxx. The 1st question is wrong. I think its F(derivative) instead of inverse

2007-08-11 05:42:35 · 2 answers · asked by Vick 1 in Mathematics

if i have (-a/b)-2, where -2 is the power of that nomber .. the result will be -9/4 ?? :-?? [4 exemple: a-n, where -n is the power of that nomber the result is 1/an]

2007-08-11 05:41:20 · 3 answers · asked by Anonymous in Mathematics

A television commercial for Little Caesars
pizza announced that with the purchase of two pizzas, one
could receive free any combination of up to five toppings
on each pizza. The commercial shows a young child waiting
in line at Little Caesars who calculates that there are
1,048,576 possibilities for the toppings on the two pizzas.

a. Verify the child’s calculation. Use the fact that Little
Caesars has 11 toppings to choose from. Assume that the
order of the two pizzas matters; that is, if the first pizza
has combination 1 and the second pizza has combination
2, that is different from combination 2 on the first pizza
and combination 1 on the second.

b. In a letter to The Mathematics Teacher, Joseph F. Heiser
argued that the two combinations described in part a
should be counted as the same, so the child has actually
overcounted. Give the number of possibilities if the
order of the two pizzas doesn’t matter.

Thanks for the help! This is getting complicated.

2007-08-11 05:38:40 · 3 answers · asked by kelcourtney13 1 in Mathematics

What are some examples of each of them?

2007-08-11 05:32:14 · 4 answers · asked by whosaysdiscoisdead 4 in Earth Sciences & Geology

If you were in a desperate to stay alive and you were starving.

2007-08-11 05:30:50 · 6 answers · asked by Anonymous in Zoology

Explain how you can tell by inspection if an equation in GENERAL FORM (ex: 4x² + 9y² - 8x - 54y + 49 = 0) is a circle or an ellipse, as well explain how you can tell by inspection of an equation in general form has its centre at the origin.

2007-08-11 05:24:23 · 3 answers · asked by Anonymous in Mathematics

Can u do anything to prevent it?

2007-08-11 05:19:22 · 6 answers · asked by Robert R 2 in Weather

How to prove the following claim from Wikipedia?
http://en.wikipedia.org/wiki/Atom_(measure_theory)

"One can prove that if μ is a non-atomic measure and A is a measurable set with μ(A) > 0, then for any real number b satisfying μ(A) > b > 0
there exists a measurable subset B of A such that μ(B) = b"

2007-08-11 05:19:21 · 6 answers · asked by hongjiren2000 1 in Mathematics

A man looking at a building at a 62 defree angle is standing 12 feet from the base. Find the height of thebuilding to the nearest hundredth of a foot.

2007-08-11 05:18:42 · 10 answers · asked by liz 2 in Mathematics

2007-08-11 05:12:40 · 7 answers · asked by butterfli71 2 in Other - Science

Are there stars still being formed in space and is this a cycle that will continue. I was just wondering,I dont know much of this subject and would appreciate any help.

2007-08-11 05:09:21 · 7 answers · asked by jason h 3 in Astronomy & Space

Personal opinions are welcome and if you have any articles or sources about this that would be great!

2007-08-11 05:08:59 · 4 answers · asked by Anonymous in Biology

(x - 2)(2x - 5) = 0

x2 + 6x - 27 = 0

x2 + 6 = -5x

5x2 = 2x - 7x2

3x2 + 6x = 2x2 - 9

5x2 - 11x + 2 = 0

x2 - 9 = 0

The area of a rectangle is 24 square meters. Find the length and width of the rectangle if its length is 2 meters greater than its width. Use an equation and the formula ® area of a rectangle = (width)(length).

2007-08-11 05:08:44 · 6 answers · asked by Texas Rose 3 in Mathematics

2007-08-11 05:08:12 · 8 answers · asked by Chilligurl 1 in Zoology

2007-08-11 05:07:36 · 4 answers · asked by Anonymous in Physics

While the builder was excavating our basement he uncovered some granite boulders with veins of quartz. When I washed off the boulders to use in landscaping I can see what appears to be gold in and around the quartz vein. Some of the gold is as large as my thumbnail. We live in an area of GA that is famous for the first gold strike in the United States. The boulders are quite heavy and are mostly granite.

2007-08-11 04:59:17 · 5 answers · asked by Anonymous in Earth Sciences & Geology

what is best for plants? is it rain water, tap water and ground water? explain please...... what element, substance or compund that the water has?

2007-08-11 04:53:39 · 10 answers · asked by Anonymous in Botany

Every time, you are near???

2007-08-11 04:48:13 · 7 answers · asked by Way 5 in Physics

I drove to the beach yesterday, at a speed of only 10 miles per hour. I drove back at a faster speed, and when I did the math, I found my average speed for the round trip was 20 miles per hour. What was my average speed home? Am I lying? Why?

2007-08-11 04:46:09 · 5 answers · asked by Gary H 6 in Mathematics

A friend at work mentioned it in the canteen, he doesn't know the answer either. I don't know if a coastline is counted, I wouldn't think so... I think the Vatican is possibly one answer. Can't figure the rest though, thanks.

2007-08-11 04:40:11 · 13 answers · asked by thequestioner 2 in Geography

If one plate pushing under another (can't remember name) can cause a Tsunami, can 2 plates moving away from each other cause a Tsunami?

2007-08-11 04:39:34 · 6 answers · asked by willow 6 in Earth Sciences & Geology

I was born in October second, and my star sign is Libra.
Do you know what is my personality?

And what is your star sign?

2007-08-11 04:38:15 · 12 answers · asked by Great Wall 5 in Astronomy & Space

can someone help me with differentiation?


Utility (at optimum) is always = 0
if for eg, the utility function = 2x³y
du/dy = 2x³
and du/dx = (3)(2)x²y = 6x²y
and dx/dy = 3y/x

am i correct with my example?

2007-08-11 04:29:01 · 3 answers · asked by Anonymous in Mathematics