Science & Mathematics - 3 October 2007

ok so our textbook has this question where its like f(n) is the number of students in your class whose birthday is on the nth day of the year. and the book wanted us to say if this problem was invertible or not. The answer was that it isn't

Ok so our teacher wanted us to think of a situation when this problem would be invertible. So does that mean what is the smallest amount of people you could gather in a room where no two people would share the same birthday? IS that the only way this problem would be invertible?

And how do u figure that number out? I found somewhere that you could have 28 ppl in a room before the probability was .5 meaning that there are 2 ppl sharing the same birthdays??

AHH...god this problem is so confusing

2007-10-03 10:28:45 · 1 answers · asked by oceanblue 3 in Mathematics

it says calculate the angular velocity in radians per minute of a ferris wheel with a radius of 125 ft that takes 45 secs to rotate once. expressin terms of pi.

another find angular displacement inradians and angular velocity in radians per minute----1/5 revolution in 3 min

i dont understand these?how on earth do you figure these out???

2007-10-03 10:27:15 · 1 answers · asked by molly 1 in Mathematics

if you told someone that the greatest depth n Lake Superior was1333 ft, would u b xpressing a # similar 2 mode.median,mean,or range?:D

2007-10-03 10:26:32 · 8 answers · asked by ladybug101 1 in Mathematics

This is my science fair project but I want to know if anybody did it or has experience with this. Please don't put what you THINK just what you know for sure. It's sort of like a survey.

2007-10-03 10:26:27 · 2 answers · asked by furby21 2 in Other - Science

2007-10-03 10:24:24 · 2 answers · asked by Anonymous in Physics

Members of LN are as follows. < 1, 1 >, < 2, 2, 1, 1 >, < 3, 3, 2, 2, 1, 1>, < 4, 4, 3, 3, 2, 2, 1, 1> ... and so on.Give inductive definition of set LN. You may use cons, head, tail etc operations on a list.

2007-10-03 10:21:51 · 1 answers · asked by simonkf2002 1 in Mathematics

Can someone break this down in steps for me that I can follow? I am lost, and would like to learn how to do the problem. Thank you!

Only two forces act on an object (mass = 2.80 kg), as in the drawing. (F = 53.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object. magnitude

2007-10-03 10:18:43 · 2 answers · asked by yummy_girlscout 1 in Physics

whats the LCM of 5, 8, and 12?

2007-10-03 10:16:40 · 9 answers · asked by rhiiiwind 3 in Mathematics

Sketch the graph of an example of a function f that satisfies all the of the given conditions.

lim (x->0^+) f(x) = infinity

lim (x->0^-) f(x) = negative infinity

lim (x->infinity) f(x) = 1

lim (x->negative infinity) f(x) = 1

Can anyone show me a visual?
It will be awesomely GREATLY appreciated.
Hats off, etc.
I will be grateful

2007-10-03 10:15:56 · 1 answers · asked by Anonymous in Mathematics

A solution of 100.0 mL of 0.200 M KOH is mixed with a solution of 200.0 mL of 0.150 M NiSO4.

(a) Write the balanced chemical equation for the reaction that occurs. (Type your answer using the format H2O for H2O and (NH4)2CO3 for (NH4)2CO3. Use the lowest possible coefficients.)
___NiSO4(aq) +_____KOH(aq) _____ ___(s) + ___ _____(aq)

(b) What precipitate forms?


(c) What is the limiting reactant?


(d) How many grams of this precipitate form?
g

(e) What is the concentration of each ion that remains in solution?
Ni2+
____ M

K+
______M

SO42-
______ M


this is crazy, how do I do this?

thanks!

2007-10-03 10:14:57 · 1 answers · asked by Jon-O 1 in Chemistry

2007-10-03 10:08:26 · 11 answers · asked by bushdud 2 in Astronomy & Space

Boiling points of several liquids

benzene 80.2 C
ethyl alcolhol 78.4 C
chloroform 61.3 C
carbon disulfide 46.3 C

Do you think a good seperation of a mixture of ethyl alcohol and benzene could be achieved by distilation?

2007-10-03 10:05:57 · 2 answers · asked by chewycookie246 4 in Chemistry

2007-10-03 10:04:37 · 5 answers · asked by Anonymous in Physics

WE shot two equal sized balls out of a shooter at 80 degrees and 10 degrees, but they didn't land near the same area like they are suppossed to. Why could this happen?

2007-10-03 10:03:06 · 4 answers · asked by miller20817 3 in Physics

10 pts for the best answer!

2007-10-03 10:02:46 · 3 answers · asked by bcdhbvohsdiucljwadsgf 3 in Biology

I mean species(animals)become endangered

2007-10-03 09:56:45 · 5 answers · asked by vahid k 1 in Zoology

2007-10-03 09:56:06 · 1 answers · asked by ramiro l 1 in Mathematics

I wish I was a derivative so I could lie tangent to your curves.

SOURCE: http://uncyclopedia.org/wiki/Derivative

2007-10-03 09:54:53 · 13 answers · asked by Arshan 1 in Mathematics

My physics teacher gave an extra credit assignment worth 20 points. i want those points so i attempted at it with a 2 page paper and that took me 5 hrs of straight research and he rejected my paper with the saying that the stars/sun move or the earth moves around the sun/stars, and we all knows this is false but i have to prove it in a way that can't be disproved. So if you know and expirement/theory or what ever please let me know cause its bugging the hell out of me.

2007-10-03 09:53:54 · 13 answers · asked by R Dizzle 1 in Astronomy & Space

2007-10-03 09:53:35 · 6 answers · asked by Anonymous in Chemistry

How many centimeters squared are in a liter?

2007-10-03 09:52:58 · 6 answers · asked by Darlene 2 in Mathematics

2007-10-03 09:50:26 · 1 answers · asked by s.s. 2 in Other - Science

2007-10-03 09:50:24 · 5 answers · asked by RogerDodger 1 in Mathematics

answer
The weekly allowances of 6 students are $5, $3, $6, $5, $9, $5 what measures of central tendency are shown by the $5 dollar values

2007-10-03 09:49:39 · 1 answers · asked by lauren.haynes 3 in Mathematics

of menthol? thymol? and resorcinol?

can someone help me with these three?

2007-10-03 09:48:08 · 4 answers · asked by sweetgirl78228 2 in Chemistry

2007-10-03 09:47:09 · 5 answers · asked by Anonymous in Chemistry

Sketch the graph of an example of a function f that satisfies all the of the given conditions.

lim (x->0^+) f(x) = infinity

lim (x->0^-) f(x) = negative infinity

lim (x->infinity) f(x) = 1

lim (x->negative infinity) f(x) = 1
If you can help me with this

This will def need to be done on paint or some graphing thing and uploaded and linked to me!

If you have AIM or MSN, please leave it or ask me to e-mail you for it if you do not wish to post it.

Or just post it here! thanks!
I will give tip (via paypal if you have) if you help me with this

2007-10-03 09:46:15 · 3 answers · asked by Anonymous in Mathematics

It's a multiple choice question and the choices are:
a. 3, 0, 9
b. 7, 9, 4
c. 5, 5, 5
d. 5, 2, 1

2007-10-03 09:43:04 · 17 answers · asked by Anonymous in Mathematics

This is based on knowing the muzzle velocity of the gun, and the distance of the target. Hint: You will need a trig. identity.

2007-10-03 09:42:28 · 2 answers · asked by Anonymous in Physics

Your storing plutonium waste underground, and it will remain deadly for thousands of years. How would you build a "danger no trespassing" sign, that would stand through the ages. And still be understandable to a people or even species, that may have absolutely no knowledge that we even existed? And definately may not know what radioactive waste is.

Here's a link http://www.damninteresting.com/?p=160

2007-10-03 09:42:16 · 2 answers · asked by Anonymous in Astronomy & Space