Science & Mathematics - 7 January 2007

Fill 2 like containers with the steams and condense. Wouldn't the dry steam pull more vacuum? (also using less water?) How much vacuum? Steam pressures can go into thousands. Can vacuum go into negative 1000's?

2007-01-07 08:21:23 · 3 answers · asked by Wattsup! 3 in Engineering

I don't understand how to do these problems:

evaluate without using a calculator log7 1/49

expand the expression log4 3x^-1y^3

condense the expression log3 32-2log3 x

thanks for the help!!!

2007-01-07 08:19:34 · 2 answers · asked by Mia16 3 in Mathematics

ie would the weather change, ie it would not rain or snow

2007-01-07 08:19:31 · 23 answers · asked by baldyhugsblues 5 in Earth Sciences & Geology

Does anyone have a formula or written evidence that proves a triangle has a total of 180 degrees?
Thanks

2007-01-07 08:19:03 · 15 answers · asked by hotmama 2 in Mathematics

What was the wind like and what were your emotions like during it's pass overhead...Thanks for your answer...Tom Science 4

2007-01-07 08:18:14 · 5 answers · asked by Anonymous in Weather

2007-01-07 08:16:15 · 3 answers · asked by Stephen A 1 in Biology

I'm in Algebra 2 right now and my teacher says I have to have at least a TI-93 but since they're so expensive and I know I'm going to need one in college too, what kind/which one should I get that will last me into my years of college.

2007-01-07 08:15:06 · 4 answers · asked by portlanddancer 2 in Mathematics

can u please explain to me how u get the answer in detail pls.

2007-01-07 08:12:46 · 10 answers · asked by avant1991 3 in Mathematics

My husband showed me a documentary that claims to have "irrefutable" evidence that the U.S. never landed on the moon in the late 60's...that there is no way that we can even go there now. What is your opinion about this issue? Did we go? Did the U.S. fake it? Give details....please.

2007-01-07 08:10:31 · 13 answers · asked by DinahLynne 6 in Astronomy & Space

2007-01-07 08:10:22 · 9 answers · asked by Dazzy B 1 in Engineering

identify the pattern, and find the next three terms:


1, 2, 7, 19, 41, 76


either its really easy and im flippin stupid or its impossible.

please help me ;)

2007-01-07 08:10:04 · 3 answers · asked by Anonymous in Mathematics

The question gives you that u=2i-j, and w=i+2j. Then, they give you an equation v=u+2w. How do you solve this problem? Do you multiply the w by 2 first, then add the u and 2w?

2007-01-07 08:09:39 · 1 answers · asked by Anonymous in Mathematics

2007-01-07 08:09:36 · 3 answers · asked by Anonymous in Engineering

I'm still confused by charles darwins theories... Natural selection mostly occurs with animals however i haven't seen any changes with animals and they havent changed in the pas few hundred years. Does this means that evolution is not real and that i have to start believing in God?

2007-01-07 08:07:06 · 18 answers · asked by ♥ 3 in Earth Sciences & Geology

Whats the best engineering maths book ou there at the mo?

2007-01-07 08:06:26 · 2 answers · asked by Anonymous in Mathematics

If random variable X is normally distributed, what is the probability density function of X square ?
E [X] = 0
V [X] = V , OR E [X^2] = V
E [X^4] = 3V.

2007-01-07 08:05:07 · 4 answers · asked by e_kueh 2 in Mathematics

helppp! how many squares are there in a 8 by 8 checkerboard? hint: NOt 64!

2007-01-07 08:04:50 · 7 answers · asked by jyu2573 2 in Mathematics

Pluto was a planet and i already asked why did they just decide to demote pluto... but why was pluto a planet???

2007-01-07 08:04:03 · 3 answers · asked by Maria 1 in Astronomy & Space

What exactly are they? Why do they come with shoes? Why do they come with beef jerky? What if i accidentally ate one?

2007-01-07 08:03:33 · 3 answers · asked by Kripster 1 in Chemistry

2007-01-07 08:03:19 · 5 answers · asked by jackal 1 in Weather

its an emergence!!
need to know for homework, pronto.
please and thank you.

2007-01-07 08:00:53 · 1 answers · asked by redheadedl3londe 2 in Chemistry

so there was once a poor man with 2 sons. he was getting really old so one day he said " you boys divide up the land once i die".

his sons each took half of the land. but they were not happy. the elder brother said that the younger brother had more land. the younger brother said that the older brother had more land. ( hint: the lands were equal anyways).

but no matter what, they argued and said that the other had more land. so they went to court and spoke with the judge.

the judge said something that solved the whole problem. just 1 sentence.

what was the sentence??? hint: the lands were equal.



reply back please if you think you have an answer!

2007-01-07 07:58:48 · 23 answers · asked by jyu2573 2 in Mathematics

2007-01-07 07:57:26 · 3 answers · asked by jvarela242 2 in Botany

2007-01-07 07:56:54 · 21 answers · asked by curly_top007 1 in Astronomy & Space

is it possible that the neutron does have a charge but not positive or negative charge?
could it be the reason why electrons down spiral down into the nucleus?
could it be the reason why the nucleus doesnt break apart due to the closely back protons?
is it possible that there more to charge then the simple positive an negative?

this is just the bases of my idea/theory but if u would just tell me its wrong or its a possibility i would very grateful because its been bugging me for a while

2007-01-07 07:56:25 · 2 answers · asked by dom 1 in Physics

2007-01-07 07:55:14 · 2 answers · asked by dmoney 1 in Mathematics

There is a very cold spell coming our way, been too mild for this winter that will come with a vengance.

2007-01-07 07:52:23 · 19 answers · asked by sakinokia 1 in Weather

2007-01-07 07:49:41 · 1 answers · asked by DBOMB 1 in Chemistry

If you could help me thanks...also tell and show me how tou did it.

2. A jar contains 2 blue marbles and 4 green marbles. Without looking two marbles are drawn from the jar. What is the probability that both marbles are the same color? Express your answer as a percent and round to the nearst tenth.Note:After a marble is drawn it is not put back. Thanks sooooooo much if you solve it... it really will help me !!!!

2007-01-07 07:46:57 · 5 answers · asked by KiKi 2 in Mathematics

This is a question that a teacher has asked me

2007-01-07 07:46:42 · 3 answers · asked by Bill 1 in Earth Sciences & Geology