Science & Mathematics - 15 November 2007

2007-11-15 16:08:43 · 7 answers · asked by Anonymous in Medicine

Use mathematical induction to show that given a set of n + 1 positive integers, none exceeding 2n, there is at least one integer in this set that divide another integer in the set.

2007-11-15 16:06:21 · 2 answers · asked by adrenalineguy87 2 in Mathematics

The solubility product constant for Ag2SO3 is 1.5x10^-14
Calculate E for the process

Ag2SO3(s) + 2e- === 2Ag(s) +SO3-2

i cant find the half cell of the sulfur reaction

Thanks for the help

2007-11-15 16:05:44 · 1 answers · asked by nathaniel49 2 in Chemistry

What are some good ways to incorporate calcium into our diets? How would you advise someone with lactose intolerance?.... i.e., what foods could they eat to get the recommended amounts of calcium? What other nutrients are important in bone health?

2007-11-15 16:01:30 · 1 answers · asked by Anonymous in Medicine

2007-11-15 15:59:34 · 4 answers · asked by nikluv17 1 in Mathematics

2007-11-15 15:59:15 · 8 answers · asked by Anonymous in Geography

By this, I mean portable laboratory grade lasers that could cut through at least plastic (heck, even Wicked Lasers can do that). I mean powerful lasers that can at least cause severe (3nd degree & up) burns in about half a second. It must have a sustainable power source (continuous for at least 5 hours). It could be a continuous beam or a rather silly "blaster beam." Is it possible today?

2007-11-15 15:55:21 · 1 answers · asked by are0z0ne 2 in Engineering

2007-11-15 15:53:44 · 5 answers · asked by Anonymous in Zoology

" If R and S are tansitive, then R U S is tansitive."
The above statement is FALSE, but I couldn't understand why.
Can someone show me it's not true by showing me a counterexample?

Thanks :)

2007-11-15 15:52:24 · 1 answers · asked by Anonymous in Mathematics

MnO has either the NaCl type structure or the CsCl type structure. The edge length of the MnO unit cell is 4.47*10^-8 cm and the density of MnO is 5.28 g/cm^3.
a) Does MnO crystalize in the NaCl or CsCl structure?
b) assuming that the ionic radius of oxygen is 140 pm. estimate the ionic redius of manganese.

For the structures it refered mo to this question....The CsCl structure is a simple cubic array of chloride ions with a cesium ion at the center of each cubic array. Given that the density of cesium cholride is 3.97 g/cm^3 and assuming that the chloride and cesium ions touch along the body diagonal of the cubic unit cell. calculate the distance between the centers of adjacent Cs+ and Cl- ions in the solid. Compare this value with the expected distance based on the sized of the ions. The ionic radius of Cs+ is 169 pm and the ionic radius of Cl- is 181 pm.

Thanks im trying to review and don't know what to do for this one...if you could help it would be great :]

2007-11-15 15:45:36 · 2 answers · asked by kayedge27 2 in Chemistry

Burning curiosity: If asteroids are hemispheric, why aren't they called "hemorrhoids," and why aren't hemorrhoids called "asteroids?"

2007-11-15 15:42:38 · 4 answers · asked by Anonymous in Astronomy & Space

I am completely lost and all my results are INcorrect!

1)A plane is flying at an elevation of 31000 feet.

It is within sight of the airport and the pilot finds that the angle of depression to the airport is 22.



Find the distance between the plane and the airport.
Find the distance between a point on the ground directly below the plane and the airport.

ESPECIALLY THIS ONE!!!

2)The reference angle of 12/5pi radians is ???radians.
The reference angle of -6/10 radians is ????
'radians.
The reference angle of 7/5pi radians is ??? radians.

2007-11-15 15:40:16 · 3 answers · asked by KYLE B 2 in Mathematics

If I become a doctor, I will definitely work for Doctors Without Borders. However, the pay is minimal and by doing it for many years I will sacrifice the chance to start and help raise a family earlier in my life (since I will be eligible for DWB after I'm 31). Therefore, as much as I would love to, I cannot do it for the rest of my life. What other things can I do besides Doctors Without Borders that will help people who really need medical help? Thanks!!

2007-11-15 15:37:12 · 3 answers · asked by AllStar 1 in Medicine

http://i4.photobucket.com/albums/y109/mal1cous/trangls.jpg

Note: the triangles are congruent.
Solve the equation for x.

2007-11-15 15:33:01 · 3 answers · asked by ariesmarsgal 1 in Mathematics

2007-11-15 15:31:28 · 2 answers · asked by jess r 1 in Engineering

2007-11-15 15:31:22 · 6 answers · asked by tam_conato 1 in Physics

2007-11-15 15:31:02 · 1 answers · asked by Anonymous in Chemistry

Please try to explain this answer to me as detailed as possible thanks!

2007-11-15 15:29:26 · 5 answers · asked by Mel 1 in Mathematics

A rod of Pyrex glass is precisely measured against an aluminum measuring stick at a temperature of 20°C, and the length of the rod is measured as exactly 25.0 cm. The temperature in the lab is then raised to 35°C for one hour, and then the Pyrex rod is measured a second time against the same measuring stick. The second measurement of the rod’s length can be expected to be:
A. 25.0 cm.
B. greater than 25.0 cm.
C. less than 25.0 cm.
D. less than or equal to 25.0 cm.

2007-11-15 15:26:41 · 1 answers · asked by Anonymous in Physics

Mike Travels 6 hours at an average rate of 80 kilometers per hour. Find the time required to travel the same distance if mikes averavge rate were 90 kilometers per hour.

how do i set this problem up?

2007-11-15 15:26:07 · 3 answers · asked by GREEN2030 1 in Mathematics

2007-11-15 15:25:43 · 7 answers · asked by chopin 2 in Engineering

Given these equations in order:
4MnSO4 + 8KOH --> 4Mn(OH)2
4Mn(OH)2 + O2 + H2O --> 4Mn(OH)3
4Mn(OH)3 + 6H2SO4 --> 2Mn2(SO4)3 + 12H2O
2 Mn2(SO4)3 + 4 KI --> 4MnSO4 + 2K2SO4 + 2I2
2I2 + 2I- --> 2I3-
3Na2S2O3 + 2I3- --> Na2S4O6 + 4 Na+ + 6 I-

and given Molarity of Na2S2O3 is .0000855 mol/L, how many moles of O2 are present?

Tell me what stoichiometry steps to work with this please!

2007-11-15 15:24:42 · 1 answers · asked by Anonymous in Chemistry

I can not figure these out for the life of me .. please help

Solve the equation by completing the square.

-7x^2 - 10x + 3 = 0

x^2 - 3x - 15 = -5

x^2 - 17x = -10x - 6

2007-11-15 15:21:30 · 3 answers · asked by Jaz 'ma' Taz 2 in Mathematics

What factors in foods affects its amount of calories?

2007-11-15 15:20:27 · 1 answers · asked by sophesticatedsophia 1 in Chemistry

2007-11-15 15:20:23 · 1 answers · asked by Anonymous in Chemistry

2007-11-15 15:18:57 · 4 answers · asked by Anonymous in Chemistry

Integrate: cosine of 3x times sine squared of 3x times derivative of x.

The answer is 1/9 sine cubed, times 3X plus C
or
1/9 sin^3(3X)+C

2007-11-15 15:17:54 · 1 answers · asked by senorstriker1 2 in Mathematics

2007-11-15 15:15:24 · 4 answers · asked by Anonymous in Mathematics

find the least common multiple:

25, 200

2, 3, 7

2,24,36

2007-11-15 15:13:30 · 9 answers · asked by Anonymous in Mathematics

For example:
100 has 2 zero ;
1000 has 3 zero

2007-11-15 15:11:12 · 2 answers · asked by thugian123.com 1 in Mathematics