Science & Mathematics - 26 July 2007

2007-07-26 06:12:00 · 8 answers · asked by GCM 1 in Physics

2007-07-26 06:09:30 · 7 answers · asked by jusjay30 1 in Mathematics

They always say how the metric system is superior because it uses units of 10 and 100 so can easily be calculated, but why does that mean the rest of us should use it? After all, our clock is divided into 12 hours (just like the foot), a circle has 360 degrees which divides evenly by 12 but not by 100, and it is so well embedded into our culture.

So then what about significant figures...where you can only use the number of digits you start with? If you have 5, divide by 2, you have 2.5 but have to round up to 3 because of significant figures. So then you want to get back to where you were, you multiply that result by 2 and you get 6. So 5 and 6 are essentially the same thing, in a scientists mind, by that rationale. I mean, I understand you can't say that you are able to divide 5 by 2 and get 2.50000000 exactly, but let's use a little common sense here people! Anyone else feel the same way?

2007-07-26 06:09:07 · 12 answers · asked by rhyno 3 in Mathematics

the main reason of calibration..

2007-07-26 06:08:29 · 6 answers · asked by mrfarme 1 in Engineering

I have a bottle of 6% vinegar. If I leave the cap off, will water evaporation make the acetic acid percent increase? Or will the acetic acid evaporate along with the water?

2007-07-26 06:07:31 · 3 answers · asked by Marvin 1 in Chemistry

2007-07-26 06:05:29 · 4 answers · asked by Anonymous in Chemistry

a/3 + 3 = 12 =

y/4 +2 = -1 =

Find the missing term in the following pattern.
1, 2, 6, 24, 120, ______

2007-07-26 06:04:20 · 11 answers · asked by x3iiloveuux3 1 in Mathematics

im doing a lab with an experiment called "acid atttack" Its about what would happen if we put chalk in vinerger and limon juice ....would it dissolve....what the chimistry behide it ....need to know by friday....thanks

2007-07-26 06:04:06 · 6 answers · asked by the one and only 2 in Chemistry

10^x+6 = 300
How do you put this into the calculator?
Thanks

2007-07-26 06:02:03 · 8 answers · asked by *05* 1 in Mathematics

a. the gene pool of the species
b. the genotype
c. the phenotype
d. multiple gene inheritance systems

2007-07-26 06:01:32 · 6 answers · asked by Eyeshield 21 of S33k3r C0unc1l 2 in Biology

2007-07-26 05:58:52 · 7 answers · asked by Mary Mowry 1 in Astronomy & Space

So i can tell what kind of rock or mineral i have and so i can label them but i want to print the pages so i can take the info and pics home with me!!!

2007-07-26 05:56:40 · 5 answers · asked by Anonymous in Earth Sciences & Geology

Compact Fluorescent Lights (CFC)
Incandescent*
LED (Light Emitting Diodes)
Halogens*
Metal Halides*
Sodium*

2007-07-26 05:54:45 · 5 answers · asked by neoslan 2 in Chemistry

10^x = 357
Thanks

2007-07-26 05:51:20 · 4 answers · asked by *05* 1 in Mathematics

2007-07-26 05:49:12 · 15 answers · asked by wolfey 1 in Physics

A living specimen in equilibrium with the atmosphere contains one atom of 14C (half-life = 5730 years) for every 7.70×1011 stable carbon atoms. An archeological sample of wood (cellulose, C12H22O11) contains 23.6 mg of carbon. When the sample is placed inside a shielded beta counter with 82.0% counting efficiency, 821 counts are accumulated in one week. Assuming that the cosmic-ray flux and the Earth's atmosphere have not changed appreciably since the sample was formed, calculate the age (in years) of the sample.

2007-07-26 05:49:08 · 2 answers · asked by Anonymous in Physics

With the death toll in one of UK's greatest flood disaster rising, what future and what hope do we all have in the ever changing global climatic conditions - for better or for worse : (

2007-07-26 05:48:24 · 4 answers · asked by T. Boy 1 in Geography

2007-07-26 05:46:41 · 19 answers · asked by Reggie L 1 in Botany

i am really bad at math can someone tell me what is $90 plus 2o%?(please no jokes ) :(

2007-07-26 05:45:53 · 9 answers · asked by gregsblueyedqt 2 in Mathematics

2007-07-26 05:45:15 · 10 answers · asked by Reggie L 1 in Botany

If you hear an echo one-second after your holler is reflected from a canyon wall 150 meters away, how fast is your voice travelling?
How does a wave's speed relate to its frequency and wavelength?

2007-07-26 05:43:59 · 4 answers · asked by Anonymous in Physics

A pair of dice are rolled. FInd the following:

1. Odds in FAVOR of doubles

2. The probability of a sum greater than 3

3. The probability of a sum that is odd and less than 4.



Two cards are drawn , without replacement from a standard 52-card deck. Find the probability of the following events:

1. both cards are black

2. the first card is a face card and the second is red.

2007-07-26 05:43:19 · 4 answers · asked by yo_ho_ho_pirates_life 1 in Mathematics

2007-07-26 05:40:58 · 8 answers · asked by williams.adrienne 1 in Mathematics

Im trying to figure out which bag of hamster shavings is cheaper, but there labeled with different measurements. One bag that is 4lbs is $16.99. The other bag is 23L which is $12.99.

2007-07-26 05:36:31 · 10 answers · asked by cate 2 in Mathematics

Two distinct #s are randomly chosen from the set {1,2,3,4,5,6}. Find the probability of each of the following events:

1. Both numbers are even

2. Both numbers are prime

3. The sum of the two numbers is even

4. The product of the two numbers is odd

2007-07-26 05:31:36 · 6 answers · asked by yo_ho_ho_pirates_life 1 in Mathematics

velocity of sound increases with humidity.So the question is when humidity is more,before or after rainfall.

2007-07-26 05:31:22 · 3 answers · asked by gyan 1 in Physics

2007-07-26 05:30:58 · 5 answers · asked by Anonymous in Engineering

2007-07-26 05:24:25 · 4 answers · asked by Anonymous in Zoology

Has this ever been solved?
Is it even possible to solve this?
Lets see Energy is equal to Mass times Carbon squared?
Whats not solvable?

2007-07-26 05:20:49 · 15 answers · asked by Anonymous in Physics

If you eat a 6oz can (180g) of tuna with ~.2 ppm Hg, how much mercury do you ingest?

2007-07-26 05:17:53 · 2 answers · asked by Anonymous in Chemistry