Science & Mathematics - 9 October 2007

Are these anything like polar coordinates or cylindrical coordinates?

2007-10-09 18:56:32 · 2 answers · asked by PT109 1 in Physics

2007-10-09 18:51:30 · 11 answers · asked by Anonymous in Astronomy & Space

2007-10-09 18:51:00 · 8 answers · asked by NicK Fury 2 in Earth Sciences & Geology

does sqrt (a^2 + b^2) = a+b??

2007-10-09 18:50:02 · 4 answers · asked by garlin104300 1 in Mathematics

When you move from 4 to 2 ohms does the power double?

2007-10-09 18:47:30 · 2 answers · asked by circle_of_ash 1 in Engineering

2007-10-09 18:47:07 · 4 answers · asked by Mercury 2010 7 in Astronomy & Space

I have to show that lim a_n = +(infinity) [as n->+(infinity)]
where a_1 >0
and:
a_(n+1) = a_n +(a_n)^(1/2) for all n>=1

It seems to me like it should be really easy, but for some reason I'm struggling.

I proved it is continues, strictly positive, and strictly increasing;

I figure the obvious thing to do is show that it is unbounded, and therefore since it is strictly increasing it diverges to +(infinity), but I'm really struggling to prove that it's unbounded.

Any help either proving it's unbounded above, or just divergent in general would be greatly appreciated!

2007-10-09 18:44:33 · 3 answers · asked by greeneggs4spam 3 in Mathematics

reference frame. a) Where does the ball land? What is your answer if the car B)accelerates c)Deccelerates d)rounds a curve e) moves with constant velocity but is open to air?

2007-10-09 18:44:28 · 4 answers · asked by Anonymous in Physics

I am completely confused, water potential is the difference in free energy or chemical potential between pure water and water in cells and solutions, but i don't understand the logistics of this equation.

2007-10-09 18:43:15 · 1 answers · asked by Isosohungy 1 in Chemistry

match the liner correlation coefficient to scatter diagram the scales on the x and y axis are the same for each scater.

A r=0.787 i have to match this to the right scater diagram. the diagrams have no numbers just dots.

2007-10-09 18:41:40 · 1 answers · asked by maxmac97 1 in Mathematics

I still think that shooting rockets at the sun would be a good way to get rid of garbage like nuclear waste

2007-10-09 18:41:27 · 5 answers · asked by Yeti 2 in Astronomy & Space

2007-10-09 18:40:43 · 2 answers · asked by Anonymous in Chemistry

If I was wrong could you please explain.

In a balanced chemical equation the number of moles of products must be equal to the number of moles of reactants.

I said (True)

A number in front of a formula in a balanced equation represents the number of moles of that substance in the chemical change.

I said (True)

A mole ratio is defined as a ratio of the number of moles of reactants to the moles of products.

I said (False)

A mole ratio is a ratio between the number of moles of any two species involved in a chemical reaction.

I said (True)

The reactant with the fewest number of moles is the limiting reactant in a chemical reaction.

I said (True)

2007-10-09 18:38:34 · 1 answers · asked by S281 2 in Chemistry

A TLC plate showed two spots of Rf 0.25 and 0.26. The plate was removed from the developing chamber, dried carefully, and returned to the developing chamber. What would you expect to see after the second development was complete?

2007-10-09 18:34:00 · 1 answers · asked by Hye K 1 in Chemistry

2007-10-09 18:33:39 · 8 answers · asked by s 2 in Weather

Do the energy forces on the outside of galaxies have the same amount of energy forces into the closer regions, or center of the galaxy. ie. Will something of the same size and mass carry the same force and gravitational pull in different areas of a galaxy?

2007-10-09 18:32:24 · 4 answers · asked by velocityfirst 2 in Physics

2007-10-09 18:32:12 · 6 answers · asked by agape 3 in Earth Sciences & Geology

If I had the exact address of a house built on a piece of property, that was at one time farm land, how or where on the internet could I find public records of what was on that land, before the house was built? The house and the houses around it were infiltrated with excessive amounts of mold. I need to find out if the houses were built on some kind of toxic waste land, or if there were springs underground, or if something has been covered up. The house is located in the Little Britain Township, in Lancaster, PA. Thanks. Also, any college professors or students that know of any kind of toxic chemical that could possibly grow mold, I'd be interested in hearing about it. I once read that Erin Brockovich found excessive amounts of mold in her house in Conejo Valley, CA. and was wondering if any kind of toxic chemical being dumped on land could cause it. If it helps a mold test was taken, and Penicillium,Asperguillius, and Cladisporin were found. No water leaks were ever found in the house

2007-10-09 18:32:03 · 2 answers · asked by Hollywood 2 in Other - Science

2007-10-09 18:29:49 · 10 answers · asked by Anonymous in Geography

2007-10-09 18:28:12 · 9 answers · asked by Anonymous in Astronomy & Space

2007-10-09 18:26:43 · 3 answers · asked by Curious About future 2 in Zoology

in the year 1201 a woman was 35 years old.
in the year 1206 the same woman was 30 years old.

how is this possible??????

write 2 or more reason how is it possible?/

2007-10-09 18:22:55 · 4 answers · asked by MiCkY 3 in Mathematics

The mineral apophyllite has the chemical formula:
KCa4Si8O20(F,OH)8H2O
My question is concerning the (F,OH) as whenever there is a comma like that in a chem formula there is supposed to be a "solid-solution". yet some mineralogy books say it is not a solid solution as such and in principle represents two distinct minerals: Fluoroapophyllite & Hyroxyapophyllite. So I am confused! ANy help would be appreciated.

2007-10-09 18:22:35 · 1 answers · asked by Gideon 1 in Chemistry

2007-10-09 18:16:43 · 6 answers · asked by apple 1 in Geography

A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a mass of 57.5 kg and air resistance exerts a total upward force of 660 N on her and her parachute.

What is the combined weight of the parachutist and parachute in newtons?
Calculate the net force on the parachutist.
What is the magnitude of the acceleration of the parachutist?

2007-10-09 18:13:31 · 1 answers · asked by Anonymous in Physics

Which enviroment would you be able to find:
plane beeding
cross bedding
symmetrical ripples
asymmetricla ripples
chert
limestone
dolostone

2007-10-09 18:11:07 · 1 answers · asked by Anonymous in Earth Sciences & Geology

There is a simple sled at the top of a frictionless inclined plane that makes an angle of 32 degrees from the horizontal. Working in the metric system, calculate

(a) the component of the acceleration of gravity parallel to the slope and

(b) the component of acceleration of gravity perpendicular to the slope.

How do I do this? Thanks.

2007-10-09 18:09:44 · 1 answers · asked by labelapark 6 in Physics

2007-10-09 18:08:30 · 3 answers · asked by engelfeurs 2 in Astronomy & Space

A skateboarder heads down a tunnel, a distance of .8 km, after starting from rest at the top of the tunnel. Assuming a slope of 4 degrees and a frictionless surface, calculate the maximum possible speed at the end of the tunnel (a) in m/sec and (b) mph.

2007-10-09 18:08:05 · 3 answers · asked by labelapark 6 in Physics

So am I right about Mars coming really close to Earth tomorrow and being visible tomorrow night Wednsday 10ct 10 2007?

2007-10-09 18:02:28 · 5 answers · asked by Anonymous in Astronomy & Space