Science & Mathematics - 3 September 2007

2007-09-03 19:39:45 · 12 answers · asked by R.Amirtharajan . 1 in Biology

At what points do the curves given by vector functions r(t) = and r(s)=<3-s, s-2, s^2> intersect? Find their angle of intersection correct to the nearest degree.

2007-09-03 19:39:40 · 1 answers · asked by Anonymous in Mathematics

2007-09-03 19:38:47 · 9 answers · asked by Anonymous in Mathematics

who said: "there is no branch of mathematics however abstract which may not somebody be applied to the phenomena of the real world"

2007-09-03 19:37:51 · 3 answers · asked by pen_bitten 1 in Mathematics

find the product

2007-09-03 19:36:43 · 12 answers · asked by Anonymous in Mathematics

ok so i do not get what to do with this problem? what is it asking me to do? how do i do it? and answers would be nice aswell

it says

Evaluate.
V+lwh for l=4yd, w=6 yd , h=15ft (a volume formula)

D=rt for r=30 mi and t=1.5 h (a distance formula)

thanx in advance

2007-09-03 19:36:43 · 5 answers · asked by heart 2 in Mathematics

2007-09-03 19:35:36 · 10 answers · asked by Anonymous in Mathematics

math logic, show the mathematical solution to the problem.

2007-09-03 19:33:10 · 11 answers · asked by Cornelo 1 in Mathematics

2007-09-03 19:32:51 · 5 answers · asked by aishah a 1 in Chemistry

The other day I dreamed that this guy I liked for awhile got a gf. I woke thinking it was just a dream and not too long after I woke up, I found out he got one, just like I found out in the dream. I'm now starting to have some dreams that come true and it's freaking me out. Is it normal and can some dreams you dream about even from a year ago come true??

2007-09-03 19:28:28 · 15 answers · asked by Dr. Phyll 3 in Paranormal Phenomena

please show work. i want to better understand how to solve this kind of question. thanx

2007-09-03 19:28:24 · 16 answers · asked by Zaq1 2 in Other - Science

m to the 8th power n to the 6th power divided by m to the 4th power and n to the 2 power

I can't figure out how to do this...I see someone else posted this previously but there is only an answer and I would like for someone to explain it to me so I can understand how to do this...Thanks so much.

2007-09-03 19:20:15 · 5 answers · asked by Anonymous in Mathematics

A subway train makes six stops of equal length during its 21 km run. The train is actually moving for 20 min of the trip. At most how long can the train remain at each station if the average speed for the trip, including stops, is to be at least 36 km/h?

2007-09-03 19:18:50 · 2 answers · asked by j;lkj;lkj;lkj;lkj 2 in Mathematics

Where is a site that i can use to find four consectutive weather maps of Australia??

2007-09-03 19:17:06 · 2 answers · asked by Anonymous in Weather

What is the source of the heat in the earth's core? Is it because everything above it is so heavy, that it all compacts together so tightly and makes everything hot? I don't know, just a suggestion.

2007-09-03 19:14:23 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-03 19:14:13 · 9 answers · asked by Anonymous in Medicine

x=-2,2,5

2007-09-03 19:14:01 · 3 answers · asked by dird 2 in Mathematics

Conversion Equations
F = 9/5 (C) + 32
C = 5/9 (F - 32)

2007-09-03 19:13:32 · 4 answers · asked by Anonymous in Mathematics

2007-09-03 19:09:54 · 8 answers · asked by JiJi 2 in Medicine

what's the importance of moving toward a more energy efficient, environmentally benign future.?

2007-09-03 19:09:45 · 7 answers · asked by kokopelli 6 in Other - Alternative

2007-09-03 19:05:48 · 5 answers · asked by xxbabycheekzix 1 in Mathematics

Maybe it's a stupid question, but I would like to know the answer anyway.

From what I've read, the earth is about 4.5 billion years old, while the universe is 13-20 billion years old.

My basic understanding of the big bang theory is that all the matter of the universe was compacted and at some point it exploded and was disbursed. Correct?

If that is correct, why is the earth so much younger than the universe? Shouldn't the material of the earth be the same age as the rest of the material in the universe?

What exactly do they mean by the age of the earth? The age of the matter? The time that it formed into a sphere? What? Again, from what I've read, the material of the earth (rocks, etc) are carbon-dated to about 3-4 billion years old.

Anyway, why the discrepancy between the age of the earth and universe?

Thanks for helping. Sorry if it's a 9th grade science question.

2007-09-03 19:05:34 · 10 answers · asked by blooming chamomile 6 in Astronomy & Space

2007-09-03 19:04:54 · 2 answers · asked by xxbabycheekzix 1 in Mathematics

2007-09-03 19:00:46 · 4 answers · asked by Anonymous in Chemistry

2007-09-03 18:58:55 · 5 answers · asked by jennifer f 1 in Mathematics

I'm doing a pharmacology experiment and am kind of confused using log equations. The question is determine what the percentage of drug X in the ionised form would be at pH 5 when the pKa of drug X = 5.8. I'm confused with how to get the percentage from the Henderson-Hasselbach equation.

2007-09-03 18:57:29 · 5 answers · asked by Anonymous in Chemistry

They are according to ohms'law:
I have a kettle watt=2400w , resistance=25ohm:
I boiled it with voltage 240v ,I calculate from the 3 equations above & I get the current=10A.
If I boiled it with voltage =120v, accoding to P=VI ,Voltage is inversely propositional to current I=2400w/120v and I supposed to get 20A. But what I get by measuring the actual current is only about 4.8A.WHY???

2007-09-03 18:53:43 · 8 answers · asked by A learner 1 in Engineering

(9.52*10^4)*(2.77*10^-5)/(1.39*10^7)*(5.83*10^2)

First i did, (9.52*2.77)=26.37040*10^-1

then i did, (1.39*5.83)=8.10370*109

i dont know if im doing it right but can someone show me step by step how to solve this problem. thanks

2007-09-03 18:53:09 · 3 answers · asked by amy 1 in Mathematics

The pentagon which is in the cirlcle has two angles which are known, one is 50 degrees the other is 80 degrees, you are asked to find the other three angles. I know that in a quadilateral and trapezium all angles add up to 360 degrees and in a trainlge they add up to 180 degrees so what about a pentagon?

2007-09-03 18:51:44 · 2 answers · asked by NaNeC 1 in Mathematics

2007-09-03 18:46:50 · 3 answers · asked by Lily 2 in Mathematics