Science & Mathematics - 16 November 2007

Jenny had driven for 2 h at a constant speed when road repairs forced her to reduce her speed by 10 mi/h for the remaining 1 h of her 152-mile trip. Find her original speed.

2007-11-16 07:08:35 · 6 answers · asked by dani m 1 in Mathematics

I need to find the concentration of water in 1M HCl. I measured the density of 1MHCl as .9886g/mL
Can someone help me out here?
I'm drawing a blank.

2007-11-16 07:05:48 · 4 answers · asked by Anonymous in Chemistry

Consider this recent report, on Yahoo News:

http://news.yahoo.com/s/space/20071115/sc_space/incrediblecometbiggerthanthesun

Okay....I actually do have a somewhat serious question about this. What would happen if we, on Earth, *hit* the comet somehow?(um, I think that's how the grammar would parse, sorry) What if we hit the radically exploded coma, or dust cloud, of this thing? Assume that we don't hit the core, since we know what that's like (the Tunguska explosion over that Russian forest).

--Would it be a disaster?
--Would it be a total non-issue, like running over the Biggest Dust Bunny Ever (that is, something we don't even notice)?
--Would it be something else entirely? (like a cool light show that lasts for *weeks on end*, or a source of atmospheric contamination)

And...I'm sorry, but "dust bunny" doesn't cut it now. ^_^ Dust Eagle (like what you get from a ceiling fan occasionally)? Dust Mastodon? Dust Leviathan? What metaphor works now?

Thanks for your time.

2007-11-16 07:02:14 · 6 answers · asked by Bradley P 7 in Astronomy & Space

Hi,
For Biology homework, I have to research exactly how solvents affect the nervous system but I can't really find it anywhere on the internet - it's all a bit brief! Just a few points would be helpful - I'm not the sort of person to ask for my homework to be done for me!

Thanks!

2007-11-16 07:01:24 · 6 answers · asked by Anonymous in Biology

2007-11-16 06:58:46 · 2 answers · asked by Jansen J 4 in Astronomy & Space

2007-11-16 06:51:10 · 6 answers · asked by Mambo M 1 in Geography

If you weighed a beaker of water on a scale, then added an object to it that was submerged in the water but did not touch the bottom of the beaker, would the scale reading increase, decrease or stay the same. Explain why

2007-11-16 06:50:39 · 8 answers · asked by Anonymous in Physics

dna is a huge molecule but if there are 23 pairs of chromosomes , so the dna is not continuous... is it?

2007-11-16 06:43:23 · 4 answers · asked by Anonymous in Biology

Please include links, thanks!

2007-11-16 06:42:39 · 15 answers · asked by Ask Mike 4 in Weather

2007-11-16 06:39:27 · 2 answers · asked by Nebula S 1 in Botany

2007-11-16 06:39:23 · 11 answers · asked by aj 1 in Astronomy & Space

2007-11-16 06:31:58 · 6 answers · asked by Heather 2 in Biology

2007-11-16 06:29:54 · 4 answers · asked by orion 2 in Chemistry

nedd some info if you want you can contribute your own stories about ghosts, bigfoot, aleins etc. or you can leave a website address thanks for your help

2007-11-16 06:27:50 · 12 answers · asked by greeninkheart aka gbs 3 in Paranormal Phenomena

Also, do stars orbit the sun or do they stay still?

2007-11-16 06:27:10 · 13 answers · asked by Anonymous in Astronomy & Space

Thanks!

2007-11-16 06:24:46 · 5 answers · asked by Neuroscience2321 2 in Physics

2007-11-16 06:24:17 · 8 answers · asked by aj 1 in Astronomy & Space

I carried out an experiment to investigate the thermodynamics of the ammonium carbamate dissociation.

NH2COONH4 (s) <--> 2NH3 (g) + CO2 (g)

Measurement of the dissociation pressure at a particular temperature enables the equilibrium constant and delta G standard at that temperature to be calculated. From measurements of the dissociation pressure over a range of temperature, the mean delta H standard and delta S standard may be calculated.

Why were the readings taken with descending temperature?

Equipment used was ballast chamber, vacuum line, pump, pressure gauge, cold trap, isoteniscope, stirrer etc...

Thank you in advance.

2007-11-16 06:23:18 · 1 answers · asked by Anonymous in Chemistry

I'm talking about an animal with a defined digestive tract (i.e., not unicellular) that can ingest food from either end and excrete waste from either end. If such a thing hasn't evolved (which I can't imagine it hasn't, so many other odd things have), would it be workable in a synthetic organism if you make an organism that needs to eat/excrete certain things? If so, what would work best as far as the kinds of things such an organism should eat/excrete?

Just curious. Very curious. About some of the darndest things. ;-)

2007-11-16 06:23:05 · 1 answers · asked by uncleclover 5 in Biology

2007-11-16 06:20:48 · 11 answers · asked by Sir Scott 2 in Astronomy & Space

Jaimey and Mike went out to the fields to pick apples in an apple grove. They picked up 638 apples in 4 days all together out of the 11,700 there. What is the percentage that Jaimey and Mike have taken up for picking the apples? How long will it take them until they pick them all?

I DON'T GET IT. Jaimey and Mike CAN'T pick up that many in even a week! What is wrong with them?! lol! My friend and I are completely clueless, so if you can help... please do!

Thank you!,
Mairy

2007-11-16 06:19:56 · 7 answers · asked by ? 3 in Mathematics

#1

3x + y = -1

becomes

y = -1 - 3x

#2

2x - y = -4

becomes

y = -4 - 2x

Is that right?

2007-11-16 06:18:57 · 9 answers · asked by Madera 2 in Mathematics

Say I have a glass on a table, in the shape of an inverted frustum of a cone. Upper radius is R[u], lower radius is R[l], height is H. It is filled with soda to a height h.

Question: How far down can I tilt the glass and not spill any soda?

Rephrased: What is the minimum value of theta (0 to 90 degrees) between the table and the side of the glass?

Consider both cases where (1) the bottom of the glass cannot be seen when you've tilted it, and (2) the bottom of the glass can be seen.

2007-11-16 06:18:45 · 4 answers · asked by FredOh F 1 in Mathematics

2007-11-16 06:17:36 · 2 answers · asked by mairmaid_2001 1 in Zoology

2007-11-16 06:11:32 · 3 answers · asked by Mio 2 in Astronomy & Space

I am supposed to use thefact that the square root of 3 is an irrational number. I know I need to use a proof by contradiction, but I am stuck after that.

2007-11-16 06:09:59 · 4 answers · asked by Anonymous in Mathematics

I'm currently in the school of Civil Engineering at a local University. This semester I'm taking Calculus 2, Physics 1, and a few other classes not worth mentioning. I have to take Calculus 3 and Differential Equations, as well as Physics 2.

My question is, for the engineers out there, specifically civil, what was the most challenging subject you encountered on your way to getting your degree?

I ask because right now I'm struggling in Physics and Cal 2. I know people aren't born engineers and I keep telling myself "Every other engineer had to do this too..." Next semester, provided I pass phyiscs 1 and cal 2, I'm lined up to take cal 3 and physics 2. I'm excited to move forward, but a little apprehensive.

2007-11-16 06:07:53 · 9 answers · asked by Matthew 1 in Engineering

A fishing pole is 2 m long and inclined to a horizontal at an angle of 20 degrees. What's the torque (t) exerted by the fish about an axis perpendicular to the page and passing through the hand of the person holding the pole?

2007-11-16 06:07:50 · 3 answers · asked by Captain Whiskerboy Litterbox 3 in Physics

http://news.yahoo.com/s/ap/20071116/ap_on_re_as/bangladesh_cyclone

2007-11-16 06:06:56 · 4 answers · asked by *Lovely 2* 2 in Weather

comput the order of each member of A-4??
A-4 is agroup of even permutations
of S-4
plz explain

2007-11-16 06:04:57 · 2 answers · asked by Dana S 1 in Mathematics