Science & Mathematics - 16 July 2007

28 day cycle in both with 4 quarter phases.

2007-07-16 08:50:25 · 13 answers · asked by verithe_luxley 1 in Astronomy & Space

2007-07-16 08:47:47 · 4 answers · asked by Lysette C 1 in Medicine

2007-07-16 08:47:12 · 2 answers · asked by Anonymous in Chemistry

If what they say is true... that if you travel close to the speed of light... that time will seem slower compared to those around you (thats not moving at light speed.) Then you can basically live 1000's of years into the future without getting too old.... But there can be no such thing as going back to the past because time is constant in one direction (forward). There will be no duplicate of you in any given time. Its just basically you ageing extremely slow. And the perception of the past is just in our minds.

"...Someone get me a looney bin, because i think ive just lost it. xD..." lol

2007-07-16 08:47:00 · 6 answers · asked by Anonymous in Astronomy & Space

the reaction will shift left to right
the reaction will shift right to left
there will be no further reaction
what happens depends on the temperature

2007-07-16 08:44:39 · 4 answers · asked by notachemwiz 1 in Chemistry

2007-07-16 08:42:40 · 5 answers · asked by suda s 1 in Chemistry

2007-07-16 08:40:34 · 9 answers · asked by Anonymous in Mathematics

I don't need answers to anything, just need to know what equations to use.

1a. Calculate the freezing point of a solution containing 70 g. of methanol, and 180 g. of water.

1b. Calculate the boiling point of the same solution.

2. At what temp. will a 3.00 molal solution of sodium fluoride freeze?

3. You need 500 mL of a 0.35M NaOH, how much 5.0M NaOH stock solution will you need to prepare it?

4. How many grams of salt would you need to prepare 5 L of a 2.50% NaCl solution?

5. Calculate the boiling temperature for a solution containing 1.5 mols of NaL dissolved in 1.25 kg of water.

6. Calculate the freezing point of a solution composed of 23.4 g of CaF2 dissolved in 175 g of water.

7.Calculate the malality of an aqueous solution of KBr. the boiling point of which is 108.5 degrees C.

8. How many grams of BaBR2 are in 750 mL of a 17.5% BaBR2 solution?

9.42.5 g of CaCl2 in 500 mL of a solution. Dilute to 0.25M. How much of the .25M solution could be made?

2007-07-16 08:39:02 · 3 answers · asked by Anonymous in Chemistry

please help me solve it and check.
thank you very much

2007-07-16 08:36:20 · 10 answers · asked by Anonymous in Mathematics

2007-07-16 08:33:28 · 4 answers · asked by paduaprs 1 in Agriculture

1.) Find f'(x) for f(x) = 8e^x + 4 ln (x^3)


2.) Find f'(x) for f(x) = 6e^5x + 8 ln(8x + 1)

I'm stuck on how to do find the derivatives of these two questions, any help would be appreciated!!

2007-07-16 08:32:44 · 3 answers · asked by gty103 1 in Mathematics

This is a text book question that I think is lacking information. Does anyone know generally how to calculate percentage error.

2007-07-16 08:31:24 · 6 answers · asked by yp_joe_arlington_887 2 in Mathematics

An investment of $1500 paid interest of $45 during a certain period. How much interest would an investment of $2000 invested at the same rate for the same time length of time pay?
How can I solve it? Can you check it also?

2007-07-16 08:30:16 · 4 answers · asked by Anonymous in Mathematics

I can't remember if I heard this in an astronomy class years ago or if I read it somewhere. Can anyone offer any explanations for dark matter?

2007-07-16 08:29:13 · 8 answers · asked by Bluebird 4 in Astronomy & Space

2007-07-16 08:27:13 · 6 answers · asked by Man Who Disproves All 1 in Chemistry

2007-07-16 08:26:16 · 28 answers · asked by blue.rose7 2 in Biology

(-6, 3pi/2)

2007-07-16 08:25:30 · 2 answers · asked by Anonymous in Mathematics

2007-07-16 08:25:27 · 2 answers · asked by Ralph N 5 in Engineering

2007-07-16 08:24:59 · 12 answers · asked by haaj ghafoor 1 in Astronomy & Space

My boss says his wife got pregnant while on the pill and his excuse was since the pill has an effectiveness of 99.997% each time, after having sex 1000 times, there should be 3 times where it wont work. Is this a correct interpretation of those statistics?

2007-07-16 08:24:25 · 4 answers · asked by cromagnonmatt 2 in Mathematics

The sun is 93,000,000 million miles away, and sunlight takes eight minutes to get here so would the light be hot, or does it have a temperature at all?

2007-07-16 08:21:08 · 3 answers · asked by Mr. Goodnight. 3 in Astronomy & Space

I'm curious...what is the most deadly substance known to man to exist today?

2007-07-16 08:19:35 · 11 answers · asked by Anonymous in Biology

Science is not my best subject so please bare with me with this one...

If light is not matter but a wave of energy, therefore not made up by elements but charges.... what makes it the fastest thing known to man? Is it because it is the most simplest of all things making it weightless? But arent we all weightless in space anyway? Or is that different ie.Atomic mass? So if there is a way to breakdown matter to charges will it then be possible to travel like light? But then you will have to combine all the particles again together to bring it to its original state.

And also... what is space? is it just a big nothingness? or is it made up of charges that within the right environment could form more complex things like atoms?

"the law of conservation of energy states that energy can not be created or destroyed, it can only be changed from one form to another"

Any thoughts on this anyone?

2007-07-16 08:17:15 · 11 answers · asked by Anonymous in Astronomy & Space

2007-07-16 08:16:33 · 9 answers · asked by Anonymous in Mathematics

kits home, which is 24ft wide and 32ft long, needs a new roof. by counting clapboards that are 4in apart, Kit determines that the peak of the roof is 6ft higher than the sides. If one packet of shingles covers 100 square feet, how many packets will the job require

2007-07-16 08:15:39 · 2 answers · asked by jesis332 1 in Mathematics

2007-07-16 08:13:55 · 3 answers · asked by John S2005 3 in Physics

If it's the current through the body that determines how serious a shock will be, why do we see warnings of "high voltage" rather than "high current" near electrical equipment?

2007-07-16 08:12:52 · 11 answers · asked by soniye88 5 in Physics

in this problem

F(x)=3x+2/ x^2-4x+4

2007-07-16 08:12:10 · 5 answers · asked by Anonymous in Mathematics

THANKS

2007-07-16 08:11:42 · 10 answers · asked by Anonymous in Mathematics

Me & my ex were having quite a pathetic argument in an email about a week ago, i replied saying look i dont give a s**** and he sent one back saying yeh but you look like s*** and then he carried on insulting me like your fat and childish insults like that..anyway does he really mean it saying this or was it because he was angry? i admit i said stuff too but i apoligised because it just came out in the spur of the moment. I know hes my ex and everything but im just curious:S by the way he finished with me.

2007-07-16 08:11:03 · 5 answers · asked by Anonymous in Biology