Science & Mathematics - 8 August 2007

2007-08-08 23:54:27 · 4 answers · asked by Irene 1 in Earth Sciences & Geology

What tempurature does it have to be for dust devil formation 100-140?

2007-08-08 23:51:56 · 6 answers · asked by Dust Devil 1 in Weather

Was the rain a result of the heat from the earth rising then forming rain.Was life evident at this time if so what would it be.

2007-08-08 23:48:20 · 6 answers · asked by realdolby 5 in Earth Sciences & Geology

2007-08-08 23:41:50 · 4 answers · asked by champscience 4 in Astronomy & Space

2007-08-08 23:26:49 · 3 answers · asked by Gretchen 1 in Mathematics

And I mean, even if it took billions of dollars and trillions(and possibly more) gallons of water, would it be possible? Or is it just an impossible concept?

2007-08-08 23:23:38 · 9 answers · asked by How To Save A Life 2 in Astronomy & Space

the angles are between 0 degrees and 360degrees.these are two separate questions.

2007-08-08 23:22:36 · 2 answers · asked by Gretchen 1 in Mathematics

hi,

i hate to do this for i become too much dependent relying on your answers., however, please help me with these few questions. it really makes my brain twist..

1.) a child is flying a kite at a height of 40 ft, that is moving horizontally at a rate of 3ft/sec. If the string is taut, at what rate is the string being paid out when the length of the string released is 50 ft?

2.) sand is being dropped at the rate of 10m^3/min into a conical pile. If the height of the pile is always twice the base radius, at what rate is the height increasing when the pile is 8m high?

PS
please show your solutions. i think, these 2 problems are examples of the application of derivative .
in question # 2, i get 0.597m/min, am i right??

aarghh...i certainly need an answer to this..

thank you so much to those who would help..
:-)good day!

2007-08-08 22:51:51 · 4 answers · asked by simply 3 in Mathematics

Plz write the steps to get to the answer, as well as the method of integration you used. Also if any part needs some thing from a law or rule, the the fundamental theorom of calc, plz mention that u used it and where:

int() = integral ()

1. int(x^3 * e^(-x^2) dx)
2. int(x^3 * (2+x^2)^(5/2) dx
3. int( abs(cos^2(x) * sin(x)) dx) range of integral is 0 to 2 pi and abs is absolute value of
4. int(x*e^(sin(x^2))) dx) range is -1 pi to +1 pi and i know the answer is 0 because the function iside the int is like oscilating...forgot the term. but plz either show how you prove its is even(maybe thats the term) or plz solve the integral.

Tks a bunch. Just write the number of the question by your answer. tks again

2007-08-08 22:51:39 · 2 answers · asked by CGAR 2 in Mathematics

hi there, i have know idea were to start in this question,

find the general solution of the equation
cos4& = cos3&

& = theta

do you have to use one of the trig identities?

thanks alot for your help!!

2007-08-08 22:42:20 · 5 answers · asked by purejoker 2 in Mathematics

Snakes, leopards, lions and wild dogs are dangerous to human beings and herbivours.discuss reasons why they should not be radicated, irespectiveof bieng dangerous

2007-08-08 22:34:27 · 3 answers · asked by Anonymous in Zoology

Find the angular velocity of a ferris wheel with a diameter of 208ft that takes 25secs to rotate once. Please express the answer in terms of pie. Thanks :)

2007-08-08 22:03:43 · 3 answers · asked by Anonymous in Mathematics

heat rises... gravity pulls downwards

2007-08-08 21:45:42 · 11 answers · asked by precious 2 in Physics

2007-08-08 21:40:50 · 5 answers · asked by jadu 1 in Astronomy & Space

2007-08-08 21:39:17 · 3 answers · asked by Anonymous in Chemistry

2007-08-08 21:35:08 · 7 answers · asked by Anonymous in Chemistry

ive got a paper ive got to write for the start of this coming semester at school and the topic is prescription drugs and their recreational abuses. ive been doing some reading on oxycontin, which is one of the drugs im going to discuss due to its popularity and i noticed a mention that one method of taking it recreationally is by grounding it up and taking it orally. it said that this provided an instant high as opposed to the controlled release when in pill form but thats all it said. im basically wondering what other effects it has when taken by this method. higher risks of negative reaction due to the medicine coming in a rush rather than overtime? would all the effects of taking it in regular pill form be amplified? any answers would be greatly appreciated. thank you in advance.

2007-08-08 21:21:18 · 7 answers · asked by kewlrocker0485 1 in Medicine

Which of the following is an example of octet expansion?

1. CIF3 (tri-fluoro-iodo methane) 2. ClF (clorine and flourine) 3.Cl2F 4. IS6

2007-08-08 21:15:55 · 1 answers · asked by Anonymous in Chemistry

1. Distinguish between a strong and weak electrolyte with reference to the degree of dissociation into ions.

2. Ionic compounds can dissociate into ions. Under what conditions all ionic compounds will conduct electricity?

3. Under what conditions ionic compounds cannot conduct electricity? And explain the difference.

4. Describe how electrolytes conduct electricity?

2007-08-08 21:05:21 · 1 answers · asked by Light 3 in Chemistry

Tonight I a friend I haven't seen or talked to in 12 years called me to say hi. Last night an old roommate I haven't seen in 5 years called to say he was thinking of me. I saw my cousin whom I haven't seen in 6 years a couple of days ago. Does it all mean something?? I'm scared...what if it is my time and they all just need to contact me to say good bye before I go. Do you think people will like me where ever it is that I end up??

2007-08-08 20:58:31 · 9 answers · asked by Anonymous in Paranormal Phenomena

(1 +sin x)/ (1-sin x) = (sec x + tan x)^2

2007-08-08 20:32:43 · 3 answers · asked by Stormy Knight 1 in Mathematics

2007-08-08 20:27:16 · 11 answers · asked by Anonymous in Weather

2007-08-08 20:24:55 · 2 answers · asked by mirian77 2 in Chemistry

He's not going to have us beside him when he has to make a diagnosis in the field. I just hope it's not me he's treating.

2007-08-08 20:22:32 · 5 answers · asked by Tamarind 4 in Medicine

2007-08-08 20:17:42 · 2 answers · asked by bacardi and diet 2 in Physics

A) 2w^2+22w+121/2w+11 B) 2w^2+22w+121/11
C) 2w+11/w+11 D)2w^2+22w+121/w^2+11w

2)Subtract. Simplify if possible
a)w-4/w - 5w -17/11w
b) 7/7r^2-7r- 3/7r-7
c) 2-y/y-8 - 7y-5/8-y

3)Subtract. Simplify by removing a factor of 1 when possible
6bp/b^2-p^2 - b-p/b+p

4) Perform the indicated operations and simplify.
v-5/v-8 - v+1/v+8 + v-56/v^2-64

2007-08-08 20:10:32 · 4 answers · asked by Jose D 1 in Mathematics

If the flex capacitor has been invented, where's Marty Mcfly?

2007-08-08 20:00:51 · 18 answers · asked by tkpartida 2 in Other - Alternative

2007-08-08 19:58:55 · 2 answers · asked by Anonymous in Chemistry

2007-08-08 19:48:49 · 4 answers · asked by montu 1 in Medicine

Given the data
(1) N2 (g) + O2 (g) to 2NO (g) delta H = +180.7kJ
(2) 2NO (g) + O2 (g) to 2NO2 (g) delta H = -113.1kJ
(3) 2N2O (g) to 2N2 (g) + O2 (g) delta H = -163.2kJ
use Hess Law to calculate delta H for the reaction: N2O (g) + NO2 (g) to 3NO (g)

2007-08-08 19:48:30 · 1 answers · asked by nick_zz 1 in Chemistry