Science & Mathematics - 24 November 2007

Evaluate
5^-2

2007-11-24 11:08:16 · 6 answers · asked by meme 1 in Mathematics

2007-11-24 11:06:59 · 2 answers · asked by Anonymous in Chemistry

Is it just me or does it seem like you can look at objects longer then people? This always happens to my friends and I. So why can you look at objects longer then people?

2007-11-24 11:05:32 · 5 answers · asked by Katara 1 in Physics

Write an equation of variation using k as the constant. The pressure P of a gas in a sealed, compressible container varies jointly with the mass m of the gas and the Kelvin temperasture T, and varies inversely with the volume V of the container.

2007-11-24 11:05:18 · 1 answers · asked by ms_nita2002 2 in Mathematics

Calculus hwk help?
Use the first derivative test to show that the shortest distance from a point (P,Q) to the line ax+by+c=0 is

d= l aP+bQ+c l/ sqrt(a^2+b^2)

(assuming (P, Q) is NOT on the line)

I dont even know where to start...

proffessor mentioned we needed to treat the y in the distance formula as a function then substittue that in for the numerator of the implicit derivative plus the x and y and solve however that is not giving me the answer.

2007-11-24 11:05:10 · 1 answers · asked by Anonymous in Mathematics

x^3 - 729 = 0

2007-11-24 11:01:43 · 6 answers · asked by Anonymous in Mathematics

What is the lcd for

4(1/n)+n=10/2/5

2007-11-24 10:59:42 · 5 answers · asked by Ballerina 5 in Mathematics

i do not mean to bug the community but my friends with
cattaracts is scared, her question can accute glacoma cause
cattaracts and if so can surgery cure the problem? thanks.

2007-11-24 10:59:31 · 3 answers · asked by Jerry S 7 in Medicine

2007-11-24 10:55:31 · 7 answers · asked by shakbar 2 in Mathematics

That are below $1000? I need thermal cameras, and all the ones that i find are like, at least $4000.

2007-11-24 10:54:16 · 2 answers · asked by Anonymous in Other - Science

Hi I have this pre-lab question that needs to be quickly answered. Please help..

I need to find the coefficients for this equation, I've tried couple of times but didn't get the answer.

K2Cr2O7 + H2SO4 + C2H5OH ---> Cr2(SO4)3 + K2SO4 + CH3COOH + H2O

Thank you

2007-11-24 10:52:48 · 2 answers · asked by miss_frd 1 in Chemistry

2007-11-24 10:46:59 · 4 answers · asked by sohan s 1 in Mathematics

i know this is a dumb question, but what kind of metal does a magnet attract? i was talking about this with my fiance today and we don't know.

2007-11-24 10:45:20 · 8 answers · asked by Loon-A-TiK 4 in Earth Sciences & Geology

it cant be a slingshot. other than that i can attach it directly to the wheel or axle.

2007-11-24 10:45:20 · 3 answers · asked by imputh 5 in Engineering

2007-11-24 10:44:07 · 2 answers · asked by Jenny D 1 in Physics

I mean applied topically, but it wouldn't hurt if some of this stuff entered the body. Like if one were a patient in need enough, they could be entered into a vat of this fluid.

2007-11-24 10:42:25 · 2 answers · asked by esha26 1 in Medicine

2007-11-24 10:39:45 · 7 answers · asked by Mamamia 2 in Mathematics

here are my questions..
Consider the following reaction:
2Al(s) + 3Cl2(g) ---> 2AlCl3(s) deltaH = -1390.81

a. Calculate the heat produced when 10 grams of AlCl3 forms?
b. How many grams of Al are required to produce 1.00 kJ of energy?
xxxx
The heat of combustion for a sample of coal is 23.0 kJ/g. what quantity of this coal must be burned to heat 500.0g of water from 20(degrees Celcius) to 90(degrees celcius)?
xxxx
if 5.0 kJ of energy is added to a 15.5g sample of water at 10(degrees celcius) the water is still a liquid. Why?
xxxx
you have a 28.2g sample of a metal heated to 95.2(degrees C). the final temperature of the water is 31(degrees C. assuming no heat is lost to the surroundings nor the calorimeter, calculate the heat capacity of the metal.

I WOULD APPRECIATE YOU IF SOMEONE COULD HELP ME FIGURE OUT WHAT I AM DOING WRONG!
just letting you know i am in HS not college! i would appreciate knowing the correct answers so i wont have to repeat this class in college!

2007-11-24 10:38:43 · 2 answers · asked by niki_0723 1 in Chemistry

Please help me i suck at math, and i dont know how big my tank is??

2007-11-24 10:35:22 · 6 answers · asked by Josh 1 in Mathematics

Magnets have always fascinated me.

2007-11-24 10:34:59 · 8 answers · asked by trickytrev 4 in Earth Sciences & Geology

2007-11-24 10:33:51 · 5 answers · asked by sammi8385 1 in Mathematics

I have a lightbulb in my restroom that is burned out. Does it burn more electricity when the switch is on than it does when it is off?

2007-11-24 10:33:11 · 10 answers · asked by Red 2 in Physics

2007-11-24 10:32:39 · 11 answers · asked by Raul 1 in Astronomy & Space

I am a high school student an I need the crystal drano to do an experiment for science. I've looked everywhere; local stores such as Acme and super G. But I hven't been able to find it

2007-11-24 10:31:43 · 2 answers · asked by mathwiz 1 in Chemistry

The quotient of two numbers is four and their diferance is forty nine. What is the smaller number of the two?

2007-11-24 10:31:36 · 4 answers · asked by GF 1 in Mathematics

2007-11-24 10:30:55 · 4 answers · asked by Eddie D 1 in Mathematics

i recently asked a question if mars is hotter than earth and many ppl told me that mars has really low temperatures.If this is true why is it that scientist are trying to c if we can live on mars?

2007-11-24 10:25:21 · 7 answers · asked by Ashley 1 in Astronomy & Space

What are the limits to the standard body armor for the military when it comes to withstanding gunfire? Just out of curiousity.

2007-11-24 10:25:05 · 3 answers · asked by Anonymous in Engineering

does accute glacoma cause blindness and can
surgery correct the problem? thanks community for your
past help, please respond as quick as possible. god bless

2007-11-24 10:24:37 · 2 answers · asked by Jerry S 7 in Medicine

and without going around the wall.

2007-11-24 10:23:42 · 4 answers · asked by rowdylaude 1 in Physics