Science & Mathematics - 18 January 2007

Can i see if the battery is filled by putting a load on the battery and checking with a multimeter if the voltage is the voltage of the battery?

2007-01-18 17:17:51 · 1 answers · asked by bcbjerke 2 in Engineering

Prove that the probability of exactly n heads in 2n tosses of a fair coin is the product of the
odd numbers up to 2n − 1 divided by the product of the even numbers up to 2n.

2007-01-18 17:16:59 · 2 answers · asked by Anonymous in Mathematics

Ok, I swear either I just don't get it, or the back of the book is wrong. But here's the question. A person can eat a meal that consists of one main course, one vegetable dish, and two different desserts. He can choose from 10 main dishes, 8 vegetable dishes, and 13 desserts. How many meals are possible? The answer I keep getting is 12,840 but the book has 6420. Can anybody give me a step by step? Thanks and good luck

2007-01-18 17:15:28 · 3 answers · asked by speedywest16 3 in Mathematics

I'm in Algebra....and have to factor...

x (squared) + 4xy + 4y (squared) - 16....

PLEAS HELP ME!!!

2007-01-18 17:10:20 · 4 answers · asked by Anonymous in Mathematics

what are the steps

2007-01-18 17:09:29 · 2 answers · asked by Anonymous in Mathematics

It's not that i don't, im just wondering how intense my biology teacher is compared to others :D


P.S. Its 6CO2 + 6H2O along with light and chlorophyll = C6H12O6 +6o2..... the 2's are meant to go underneath :D

2007-01-18 17:08:23 · 6 answers · asked by C-Dog 2 in Biology

According to the article here:http://www.astronomy.com/asy/default.aspx?c=a&id=4994 there are globs of dark matter floating around. If a space ship ran into them what would happen?

2007-01-18 17:07:13 · 3 answers · asked by Anonymous in Physics

show me the steps

2007-01-18 17:05:28 · 4 answers · asked by Anonymous in Mathematics

2007-01-18 17:03:00 · 3 answers · asked by Rao M 1 in Physics

Why athletes and sports persons generally have a lower heart rate which is considered to be normal for them?

2007-01-18 16:58:55 · 6 answers · asked by knowledge seeker 2 in Medicine

2007-01-18 16:51:54 · 20 answers · asked by William Clams 1 in Astronomy & Space

A geometric isomers


B enantiomers


C covalent isomers


D structural isomers

2007-01-18 16:51:06 · 5 answers · asked by Anonymous in Chemistry

Find the following:

lim x->0 of (1 - 2x) ^ (1/x)


(a) +infinity
(b) 1
(c) 1/2
(d) 2/e
(e) e^(-2)

Please explain your answer

2007-01-18 16:47:07 · 7 answers · asked by nima 2 in Mathematics

2007-01-18 16:45:05 · 8 answers · asked by Anonymous in Engineering

The question is:
Let c and d be divisors of n. If (c,d) = 1 then cd|n.
I have to prove that cd|n and I'm not really sure how to go about that. Any help would be greatly appreciated.

2007-01-18 16:42:54 · 3 answers · asked by yogastar02 2 in Mathematics

2007-01-18 16:42:36 · 7 answers · asked by Somebody 1 in Physics

3. A company is reviewing tornado damage claims under a farm insurance policy. Let X be the portion of a claim representing damage to the house and let Y be the portion of the same claim representing damage to the rest of the property. The joint density function of X and Y is

f(x,y)= 6(1-(x+y)) for x>0, y>0 x+y>1
0 otherwise

What is the density function of X and Y?

2007-01-18 16:42:26 · 2 answers · asked by myself 1 in Mathematics

x^2 + y^2 = r^2

Is there a such thing as a general circle equation?
Is that it (above)? How does it work?

Thanks much!

2007-01-18 16:41:52 · 6 answers · asked by Hello. 1 in Mathematics

what is a phosphodiester group? what is the chemical makeup of the phosphate groups that join DNA and RNA, what is the difference between their chemical makeup (DNA and RNA) and what is the numbers (1-5) for each position??

2007-01-18 16:41:52 · 1 answers · asked by calgrlzrockharder 2 in Biology

Air bags are designed to deploy 30 cm in 12 ms. Estimate the acceleration of the front surface of the bag as it expands. Express your answer in terms of the acceleration of gravity g.

2007-01-18 16:41:51 · 4 answers · asked by eureka4sureka 1 in Physics

Supposed that the cost C, in dollars, of producing x chairs is given by C = 2x^2 - 40x + 2400. How many chairs can be produced for $4650?

2007-01-18 16:37:30 · 5 answers · asked by badmf777 1 in Mathematics

The length of a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 5cm, what are the dimensions (the length and width) of the rectangle?

2007-01-18 16:36:47 · 7 answers · asked by badmf777 1 in Mathematics

Is Evolution a "scientific" theory? Does it have the qualities of every other scientific theory. For example, can it predict anything that couldn't have been predicted before Darwin published his work? It dosen't seem as though darwinism can predict anything because darwinism can accomadate any scenario. As Karl Popper once said during a breif moment of honestly, if in an experiment you put some bacterium on an unihabited planet and left it there for 2 billion years, darwinism could account for whatever happened. If there were only a few simple organisms darwinism could explain. if there was nothing darwinism could explain. if there were advanced life forms darwinism could explain. A theory that can explain every conceivable scenario is not a scientific theory. A true scientific theory tells us about the way the world works, which means it must be able to predict. Much of what evolution DOES claim to predict are about changes WITHIN species that could have been made pre-darwin.

2007-01-18 16:36:38 · 4 answers · asked by Perceiver 3 in Biology

Can you do this? why not? the numbers themselves are easy to recall. but column math and in your head math dont work out

add 456 to 456 in your head

isnt that hard enough to do? its only 3 numbers

alright i'm down to 2 add 77 to 77

still doin that column addition in your head? it hurts, not entirely user friendly

Try this below

456
456 simple pattern easy on the head

At this point adding 0 to 9 to itself should be quickly second nature. with specific note on 5 and above because it causes jumps.examples 3+3=6, 4+4-8 but note while 5+5 will equal a zero and create jump, 7+7 makes a 4 and create jump, 9+9 is 8 and a jump

If old school was a carryover then I guess this way is a jump

so this is how I can see the numbers

visualize

456
456
work left to right

think 4+4 plus a jump 9 say nine
think 5+5 plus a jump is a 1 say one
think 6+6 makes a 2 say two.
I said the answer I'm done.

Do you see? Practice then you can do your phone number.

2007-01-18 16:35:59 · 3 answers · asked by Wattsup! 3 in Mathematics

2007-01-18 16:35:42 · 15 answers · asked by Ratt 2 in Astronomy & Space

2007-01-18 16:33:49 · 2 answers · asked by Anonymous in Mathematics

2007-01-18 16:33:22 · 4 answers · asked by Small Lady 4 in Mathematics

1) If a number is tripled and then divided by 1/2, the reslut is the same as multiplying the original number by what number?

2) In a right triangle, if the lengths of the legs are 10 and 24, what is the length of the hypotenuse?

4) Engraving costs 62cents for the first 5 letters and 8 cents for each additional letter. How many letters are there in a name which costs $1.66 to engrave?

2007-01-18 16:30:02 · 6 answers · asked by P E R S O N 2 in Mathematics

2007-01-18 16:28:58 · 3 answers · asked by upendra sharma 1 in Astronomy & Space

How could Dr. Spencer Wells ever hope to identify ONE pair of humans to give start to all of us? (see more details on the NatGeo DNA project at www.nationalgeographic/genographic)

This sounds very much like a attempt to "prove" the holly or extraterrestrial start of human civilization, contrary to the Darwin's theory... If they did not mean to diminish Darwin's theory, how can they be able to trace the Pair of Humans. They may only trace at least a tribe or two, AND THEN they may trace it back to supermonkeys and even dolphins or something in the ocean! Not just ONE pair of humans, especially and if only Dr. Spencer Wells admit that the DNA is THE biological HISTORY book/code, not a book of revelation.

Altynbek

2007-01-18 16:27:20 · 3 answers · asked by Alt 1 in Biology