Science & Mathematics - 24 October 2007

2007-10-24 07:38:31 · 17 answers · asked by bulzy_23 1 in Zoology

Did Claude-Louis Navier and George Gabriel Stokes came up with their equations which accounted for viscocity by studying each other's "money shots?" I mean, there is very valuable data to be had there and I just wonder if they took it into consideration. Or would the difficulty in establishing a constant velocity render it moot?

2007-10-24 07:37:42 · 8 answers · asked by ZombieTrix 2012 6 in Engineering

Ricardo, of mass 81 kg, and Carmelita, who is lighter, are enjoying Lake Merced at dusk in a 29 kg canoe. When the canoe is at rest in the placid water, they exchange seats, which are 2.6 m apart and symmetrically located with respect to the canoe's center. Ricardo notices that the canoe moves 46.5 cm horizontally relative to a pier post during the exchange and calculates Carmelita's mass. What is it?

2007-10-24 07:36:51 · 4 answers · asked by Anonymous in Physics

5 times the first of 3 consecutive even integers is 14 more than 3 times the second. What is the third consecutive integer?

10
12
14
16
18

2007-10-24 07:33:56 · 4 answers · asked by kyle p 1 in Mathematics

Which of the following could you refer to as a reason for a statement in a proof? [multiple choice]?
a. postulate
b. given
c. definition
d. any of these

2007-10-24 07:27:53 · 4 answers · asked by hillio m 1 in Mathematics

(7/2p) - (5/8) + 4 = 0

2007-10-24 07:27:23 · 4 answers · asked by DoWHATiDO 3 in Mathematics

Base layer is rectangle nxm, and has arbitrary chosen pattern of brick colors.
The bricks in each next layer nxm are chosen so, that
the color of each brick satisfies the following conditons:

1) Each black brick has even number of black neighbours;
2) Each white brick has odd number of black neighbours.

Prove: there will always appear a layer at certain
height, which pattern is similar to the base layer,
but all colors reversed.

That is if base layer is for exmaple
bwbw
bbbb

then sooner or later layer colored as
wbwb
wwww
will appear.

2007-10-24 07:27:11 · 4 answers · asked by Anonymous in Mathematics

2007-10-24 07:26:22 · 1 answers · asked by coffeeheadab 1 in Botany

2007-10-24 07:19:08 · 5 answers · asked by liviu ciprian g 1 in Geography

For f(x) x^3 (x-1)^2 (x+6)^4, determine:

a. the x- and y- intercepts, if any

b. whether f(x) touches or crosses the x-axis at each intercept

My answer:

a. The intercepts are (0,0), (1,0), (-6,0). How do I find out which one crosses or touches. I need to be able to do this without using a graphical calculator.

Thanks.

2007-10-24 07:19:00 · 2 answers · asked by labelapark 6 in Mathematics

How do I make this finished: I-(aq) + IO3-(aq) → I2(aq) (acidic solution)

2007-10-24 07:18:54 · 4 answers · asked by Maria 1 in Chemistry

Does a 12' x 24' pool contain of water? One end is 6' deep, the other is 3'.

2007-10-24 07:10:27 · 3 answers · asked by Anonymous in Mathematics

How would you explain it?

2007-10-24 07:09:20 · 10 answers · asked by Anonymous in Parapsychology

Anybody watch their show on Sci-Fi? Or have met them? Or have had their house or property looked at by them?
or is anybody a ghost hunter and if so, with what group?

2007-10-24 07:08:38 · 6 answers · asked by Tifferz 2 in Other - Alternative

copper (atomic mass 63.5) occurs in nature in the form of two isotopes. Cu-63 and Cu-65 use this info to calculate the percent abundance of each copper isotope....show workkk

2007-10-24 07:06:42 · 4 answers · asked by Tr4ck4Inc@ 2 in Chemistry

Its very bright.

2007-10-24 07:06:26 · 14 answers · asked by D 7 in Astronomy & Space

2007-10-24 07:06:15 · 4 answers · asked by Anonymous in Zoology

2007-10-24 07:05:34 · 3 answers · asked by Anonymous in Physics

2007-10-24 07:02:51 · 7 answers · asked by rshankeruk 2 in Earth Sciences & Geology

Explain in detail, Show the dissociation of electrolytes in water and which of the three will have the biggest effect on the freezing point of a solution.

2007-10-24 07:02:28 · 1 answers · asked by needanswers.. 1 in Chemistry

Consider the dissolution of CaCl2.
CaCl2(s) Ca2+(aq) + 2 Cl -(aq) H = -81.5 kJ

A 11.9 g sample of CaCl2 is dissolved in 119 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the surroundings and assuming the solution has a specific heat capacity of 4.18 J/°C·g.

2007-10-24 06:59:31 · 1 answers · asked by toocool 1 in Chemistry

I have a great interest in solar panel technology, and would like to find a school specifically geared twoards that technology. so I am assuming that I could get a degree in this area in a two to four year schooling experience. Are you or do you know anyone who is trained in this area? How do I get educationional information about such schools or institutions?

2007-10-24 06:58:47 · 1 answers · asked by rdcatman 3 in Engineering

[2x+1]=6x-7

2007-10-24 06:57:33 · 2 answers · asked by investing1987 3 in Mathematics

2007-10-24 06:55:35 · 13 answers · asked by weaponx 1 in Medicine

I've always tried to be the kind of person who does really well in school/college, has time to spend with family and friends, works part-time, and still manages to help people by doing volunteer work.

So far I have not succeeded.
If I get a job, my marks suffer... if go out with friends or family, I have no time for this and that.... how do you get out of this constant stuggle?

2007-10-24 06:55:05 · 5 answers · asked by Anonymous in Chemistry

2007-10-24 06:51:50 · 2 answers · asked by Kelly L 1 in Biology

2007-10-24 06:50:12 · 10 answers · asked by Aakanksha 3 in Astronomy & Space

Tossing Your Lunch. Henrietta is going off to her physics class, jogging down the sidewalk at a speed of v. Her husband Bruce suddenly realizes that she left in such a hurry that she forgot her lunch of bagels, so he runs to the window of their apartment, which is a height h above the street level and directly above the sidewalk, to throw them to her. Bruce throws them horizontally at a time t after Henrietta has passed below the window, and she catches them on the run. You can ignore air resistance.

With what initial speed must Bruce throw the bagels so Henrietta can catch them just before they hit the ground?
Take free fall acceleration to be g.

Where is Henrietta when she catches the bagels?
Take free fall acceleration to be g.

i know how to do it when there is actual values, but in this case it is all symbolic so im struggling to achieve correct answer.

Best i could do is: V(t+sqrt2h/g) all divided by t

wrong tho, help please, if someone could explain the method needed

2007-10-24 06:48:59 · 2 answers · asked by Anonymous in Physics

If a hexagon has a radius (center to point of angle) of 6, what is the side of the hexagon?

2007-10-24 06:48:25 · 5 answers · asked by Nathan C 1 in Mathematics

this is abt history of america

2007-10-24 06:47:59 · 3 answers · asked by Anonymous in Geography