Science & Mathematics - 25 October 2006

Use linear approximation to estimate the amount of paint in cubic centimeters needed to apply a coat of paint 0.010000 cm thick to a hemisperical dome with a diameter of 45.000 meters.

Can anyone help with this. I started by finding the area of the hemisphere 4pi(r)^2 all divided by 2. Not sure where to go from here.
thanks

2006-10-25 17:14:58 · 4 answers · asked by wasatchjeeper 2 in Mathematics

2006-10-25 17:13:55 · 11 answers · asked by tigerlily 1 in Physics

let A and B be groups. Prove that A X B is isomorphic to
B X A .

2006-10-25 17:13:44 · 2 answers · asked by David F 2 in Mathematics

Do you think male gynecologists are creepy, like I do?

2006-10-25 17:13:12 · 11 answers · asked by Jon M 2 in Medicine

2006-10-25 17:08:36 · 9 answers · asked by Mathew C 5 in Other - Science

2006-10-25 17:07:37 · 2 answers · asked by julie ann l 1 in Medicine

xyz to the second power

2006-10-25 17:07:36 · 5 answers · asked by hao a 1 in Mathematics

When a 3.25g sample of solid sodium hydroxide was dissolved in a calorimeter in 100.0g of water, the temperature rose from 23.9 degrees C to 32.0 degrees C. Calculate the enthalpy change (in kJ/mol NaOH) for the soln process:

NaOH (s)------->Na+ (aq) + OH (aq)

(Assume it's a perfect calorimeter and that the specific heat of the soln is the same as that of pure water.)

thanks to all you chem wizards lol

2006-10-25 17:06:49 · 3 answers · asked by Anonymous in Chemistry

can someone help me to find the inverse of e^x and 2^x ?

2006-10-25 17:06:33 · 5 answers · asked by Kim M 2 in Mathematics

Everyone in homework help has got this one wrong.

Find the inverse of

F(x) = (7/x) - 3

Should start like

y = (7/x) - 3
y - 3 = (7/x) How do you get x alone?????

2006-10-25 17:03:24 · 6 answers · asked by ctjarig 1 in Mathematics

I have 2 ques:

-Calculate the final temperature when 50mL of water at 60 degrees C are added to 25mL of water at 25 degrees C.

-A piece of metal weighing 5.10 g at a temperature of 48.6 degrees C was placed in a calorimeter into 20.00mL of water at 22.1 degrees C, and the final equilibrium temperature was found to be 26.8 degrees C. What is the specific heat of the metal?

I thought specific heat=q (heat in J)/ (m)(change in temp)...but I can't seem to use that for this problem...

any help is greatly appreciated!!!

2006-10-25 17:02:16 · 5 answers · asked by Anonymous in Chemistry

2006-10-25 17:01:33 · 4 answers · asked by CurlySue 2 in Other - Science

2006-10-25 16:59:49 · 5 answers · asked by chris10 1 in Geography

2006-10-25 16:54:37 · 19 answers · asked by elliejay21 2 in Physics

xyz squared

2006-10-25 16:53:15 · 8 answers · asked by hao a 1 in Mathematics

2006-10-25 16:52:19 · 10 answers · asked by Girl P 1 in Other - Science

is it true that no 2 lightning can fall at a same place...

2006-10-25 16:51:19 · 17 answers · asked by pat 1 in Weather

2006-10-25 16:49:05 · 3 answers · asked by KFS 2 in Chemistry

I DO!! ive done it before but i forgot what do i need to use for the vacuole..nucleus..mitochondria.ribososmes..and anything!? Please note that we cant use candies or any type of food for the project.

2006-10-25 16:48:37 · 2 answers · asked by Anonymous in Earth Sciences & Geology

If the small block has mass m=10kg, find the mass M of the larger block to give the smaller block an upward acceleration of 3 m/s2
.......O
.....|....|
._|_.._|___
|__|..|____|
S........L

*sorry my drawing sucks...

2006-10-25 16:46:06 · 3 answers · asked by chris p 3 in Physics

Can anyone suggest a synthesis of 4,4-diphenylbut-3-en-2-one without using grignard synthesis?

2006-10-25 16:45:45 · 4 answers · asked by Hard Rocker 3 in Chemistry

2006-10-25 16:45:36 · 8 answers · asked by Anonymous in Mathematics

seriously sice i waz in 3 grade i had so much problems with math and noww days that im a junior in high school i still dont know math that well i just dont get it it wont stick on my head i dont know what it is!!ppl help

2006-10-25 16:44:18 · 16 answers · asked by joanna l 1 in Mathematics

i know for a lot of gases, its form needs to be like O2, H2, but is sulfur one of those gases? thanks a lot

2006-10-25 16:44:08 · 3 answers · asked by nickname 3 in Chemistry

2006-10-25 16:43:52 · 3 answers · asked by CurlySue 2 in Other - Science

A ball having a mass of 150 g strikes a wall with a speed of 5.2 m/s and rebounds with only 50% of its initial kinetic energy. (a) What is the speed of the ball immediately after rebounding? (b) What is the magnitude of the impulse on the wall from the ball? (c) If the ball was in contact with the wall for 7.6 ms, what is the magnitude of the average force on the ball from the wall during this time interval? Can you explain how you get your answers?

2006-10-25 16:43:23 · 1 answers · asked by Anonymous in Physics

How long is it, and how far is it from the sun?

2006-10-25 16:43:12 · 6 answers · asked by g0tbailey 2 in Astronomy & Space

I am a Christian, but feel ashamed by those who share my faith, yet do not use the mind God gave them. Around the world Christians accept what science is and how it works, but here in the USA the majority know little about what science is and how it explains the world around us.

In science theories are used to explain facts; observed facts (fossil sequences, comparative DNA, homology, embryology) are explained by a theory called Evolutionary Biology.

Science itself cannot say anything about the existence or non-existence of God or anything supernatural since that is the realm of theology and not science, yet instead of educating themselves I have found many of my fellow Christians remaining ignorant about science, incredulous of its methods, and willing to deceive themselves and others about many fields of science (geology, physics, chemistry, biology) and even mathematics in order to attack Evolutionary Biology while proving they cannot even correctly define said theory.

2006-10-25 16:38:36 · 11 answers · asked by Anonymous in Biology

I need help figuring out the first problem on the following practice test. Thanks for your help!
http://www.math.gatech.edu/~carlen/1502F06/PT3F06.pdf

2006-10-25 16:36:53 · 6 answers · asked by Anonymous in Mathematics

An ice skater of mass m is given a shove on a frozen pond. After the shove she has a speed of v_1 = 2 m/s. Assume that the only horizontal force that acts on her is a slight frictional force between the blades of the skates and the ice.

Use the net work-kinetic energy theorem to find the distance the skater moves before coming to rest. Assume that the coefficient of kinetic friction between the blades of the skates and the ice is u^kin = 0.12.

2006-10-25 16:36:43 · 3 answers · asked by Anonymous in Physics