Science & Mathematics - 16 September 2006

2006-09-16 17:17:40 · 12 answers · asked by substance 2 in Chemistry

straight river with a width of 6.4km and a current of 3.2 km/h. Let i piont directly across the river and j point directly downstream. It she rows in a straight position, (a) at what angle to i must she point the boat and (b) how long will she take? (c) How long will she take if instead, she rows 3.2km up the river and then back to her starting point? (e) At what angle to i should she point the boat if she wants to cross the river in the shortest possible time? (f) How long is that shortest time?

2006-09-16 17:16:21 · 1 answers · asked by gods1princesschanel 1 in Physics

2006-09-16 17:14:18 · 5 answers · asked by the_suffering420 1 in Mathematics

2006-09-16 17:12:54 · 8 answers · asked by ASH 1 in Chemistry

This ((x+2/x)/(x-2/3x)), or
this (x^2-25y^2/5x^2+25y)/(x^2-5xy)

2006-09-16 17:11:20 · 3 answers · asked by Anonymous in Mathematics

2006-09-16 17:10:11 · 18 answers · asked by Anonymous in Chemistry

i do know it will undergo completion after fertilization, but i want to know what's the reaon to it. and since 2nd ooctye suspend at meiosis 2 why not 2nd spermatoctye? thanks alot!!:)

2006-09-16 17:02:06 · 3 answers · asked by siangal07 2 in Biology

2006-09-16 17:00:54 · 40 answers · asked by Anonymous in Zoology

same as topic
How are breathing and cellular respiration similar?

2006-09-16 17:00:53 · 10 answers · asked by kevin09132002 3 in Biology

2006-09-16 16:56:27 · 4 answers · asked by deathvirgen 1 in Chemistry

2006-09-16 16:54:14 · 9 answers · asked by a a 1 in Biology

2006-09-16 16:53:50 · 9 answers · asked by Anonymous in Astronomy & Space

the x axis. At the instant particle A passes the y axis, particle B leaves the origin with zero initial speed and constant accleration a of magnitude 0.40 m/s2. What angle θ between a and the positive direction of the y axis would result in a collision?

2006-09-16 16:53:48 · 1 answers · asked by gods1princesschanel 1 in Physics

2006-09-16 16:51:50 · 6 answers · asked by WonderC 1 in Other - Science

Light is colorless.The walls in my kitchen are not white when I leave the room right!
Vibrating air molecules are not sound until they reach our ears.
Would you agree that most of what we preceive as reality occurs only in our heads?

2006-09-16 16:47:42 · 9 answers · asked by vande-man 3 in Other - Science

What do snakes do to adapt to enviroment?

2006-09-16 16:47:03 · 2 answers · asked by Best Helper 4 in Biology

2006-09-16 16:46:22 · 4 answers · asked by Anonymous in Chemistry

2006-09-16 16:36:58 · 11 answers · asked by Ever evolving Edwin 2 in Medicine

I am really horrible at Math. Could I get some help? Complex fractions
((m^3/7)/(m^7/28))
I came up with 4^4.
Did anyone else?

2006-09-16 16:30:41 · 8 answers · asked by Anonymous in Mathematics

What is the metric unit that would be used to report the length of a piece of notebook paper?

& why do scientists all over the world use the metric system?

10 points for whoever can answer these. =]

2006-09-16 16:29:02 · 12 answers · asked by JoAnna 2 in Biology

2006-09-16 16:28:55 · 2 answers · asked by Anonymous in Zoology

Is a plant/tree dead as soon as you remove it from it's roots, or is it still considered living for some time, until it dries out? What constitutes "life" in a plant/tree? Roots, photosynthesis, etc?

2006-09-16 16:26:28 · 5 answers · asked by Envision79 1 in Botany

like chunks of milk were on the surface of the mixture... Was it safe for me to drink this? Why were there white chunks?

2006-09-16 16:21:56 · 12 answers · asked by tiff-fee-uh-nee. x_X 2 in Chemistry

which occurs in a nonaqueous solvent: NaBH4 + BF3 -> B2H6 + NaBF4 (unbalanced). If the reaction has a 71% yield of diborane, how many grams of NaBH4 are needed to make 31.2 g B2H6?

2006-09-16 16:17:15 · 1 answers · asked by Anonymous in Chemistry

which occurs in a nonaqueous solvent: NaBH4 + BF3 -> B2H6 + NaBF4 (unbalanced). If the reaction has a 71% yield of diborane, how many grams of NaBH4 are needed to make 31.2 g B2H6?

2006-09-16 16:16:25 · 1 answers · asked by Anonymous in Chemistry

2006-09-16 16:16:12 · 9 answers · asked by Anonymous in Medicine

2006-09-16 16:15:25 · 8 answers · asked by Chris M 2 in Mathematics

is mental telepathy possible?

2006-09-16 16:11:18 · 14 answers · asked by Anonymous in Other - Science

2006-09-16 16:09:50 · 7 answers · asked by Roberto 2 in Mathematics

If one-half a number is sibtracted from five-sixths of the number, the difference is six. Find the number.

2006-09-16 16:04:50 · 6 answers · asked by Anonymous in Mathematics