Science & Mathematics - 11 February 2007

2007-02-11 17:10:10 · 13 answers · asked by jennilaine777 4 in Biology

Where can I find the best, most thorough documentation or info on how to use Pro/E Wildfire II....including making drawings from the models.

2007-02-11 17:09:02 · 1 answers · asked by Phoenix 1 in Engineering

Implicit Differentiation Procedure: Assume that an equation of the form F(x,y)=G(x,y) defines y implicitly as a function of x. The derivative dy/dx can be found in the four steps listed below.

Put the steps in the right order.


1 2 3 4 Factor dy/dx from the side involving the dy/dx terms

1 2 3 4 Collect all terms involving dy/dx on one side of the equation, and collect all other terms on the other side.

1 2 3 4 Solve for dy/dx.

1 2 3 4 Differentiate both sides of the equation with respect to x.

2007-02-11 17:08:08 · 2 answers · asked by Anonymous in Mathematics

ln(r^9s^3 √r^9s^7)

^ = raised to power.
√ = Square root of all terms that follow this sign

2007-02-11 17:07:39 · 2 answers · asked by Tazzzy 1 in Mathematics

2007-02-11 17:06:44 · 4 answers · asked by sorna s 1 in Biology

What is a stem-and-leaf plot and how do you do it?

2007-02-11 17:02:12 · 2 answers · asked by Anonymous in Mathematics

2007-02-11 17:00:43 · 1 answers · asked by 2manynumbers 1 in Mathematics

I've always wondered.....

2007-02-11 16:56:41 · 7 answers · asked by Mona217 2 in Engineering

like the goodyear or others similar. My husband claims if it is punctured it will explode! is that true? lol

2007-02-11 16:56:40 · 5 answers · asked by riblette 2 in Astronomy & Space

A packet contains the seeds of flowers which will be either red or yellow. 2/3 of the seeds will produce red ones and 1/3 will produce yellow ones. (Please note that no specific seeds number is given)
a) If select two seeds at random, what is the probability that both will produce a yellow flower?
b) 4/5 of the red flower seeds germinate, while 9/10 of yellow flower seeds germinate. What is the probability that a seed chosen at random will germinate?

Would you please kindly show the working process?

2007-02-11 16:55:14 · 1 answers · asked by steven08zl 1 in Mathematics

Please Help! i need pages446. #10,12,14,16,18,20,22,and 24..... page 456. #8,14,20, and 22. page. 439. #10,12,14, and 16. Thanks.

2007-02-11 16:55:02 · 1 answers · asked by kefrazier08 1 in Mathematics

2007-02-11 16:54:54 · 4 answers · asked by larissa16_0 1 in Mathematics

hello. Im confused. Why is it the ionic radii larger in anion? or smaller in cation? what are the reasons to this? i try to find the answer on some websites, but im not so satisfied with them. Thanks

2007-02-11 16:54:21 · 2 answers · asked by lisacan 2 in Chemistry

2007-02-11 16:53:50 · 2 answers · asked by Paster T 1 in Biology

2007-02-11 16:47:09 · 0 answers · asked by plshelp08 2 in Geography

Radioactive thorium-230 undergoes the following decay process, in which the products have a lower mass than the reactants. The "lost mass" is converted to energy.
230 (90) Th --> 4 (2) He + 226 (88) Ra

(The number is parenthesis are the subscripts of the element in front of it. )


Relevant atomic masses: 230 (90) Th = 230.03313, 4 (2) He = 4.00260, 226 (88) Ra = 226.02540

a. Calculate the energy released when a mole of
230 (90) Th decays.


b. If we could use the energy from this nuclear reaction to heat some water to make tea, how many grams of radioactive thorium-230 would be needed to heat 750. g of water from 22.0°C to 99.0°C?

c. Another way to heat water for our tea (from part b) is to convert the kinetic energy of water falling from a dam into electricity, and then into heat. If the water is falling from 325m, how many grams of water is needed to fall to heat 750.g of water from 22.0°C to 99.0°C?

2007-02-11 16:42:59 · 1 answers · asked by Anonymous in Chemistry

When finding the work done to empty a sphere shaped tank, what equation do you use for the area?

Do you treat the sphere as a circle and use pi x r^2? Or as a sphere and find the volume

2007-02-11 16:42:49 · 3 answers · asked by surfergrl145 2 in Mathematics

please help me i dont know how to solve this question!!!

2007-02-11 16:42:33 · 5 answers · asked by gunrunny 2 in Mathematics

answers:
e^4/9
e^9/4
e^9
e^4

2007-02-11 16:42:10 · 5 answers · asked by Anonymous in Mathematics

2007-02-11 16:41:05 · 14 answers · asked by ? 4 in Earth Sciences & Geology

2007-02-11 16:40:24 · 3 answers · asked by Chef Dane 2 in Astronomy & Space

answers:
-9
3 or -6
-3 or 6
3 or 6

2007-02-11 16:34:56 · 7 answers · asked by Anonymous in Mathematics

answers:
16
9
12
6

2007-02-11 16:33:55 · 6 answers · asked by Anonymous in Mathematics

2007-02-11 16:32:21 · 7 answers · asked by SANDEEEP B 1 in Geography

(y^2-16)/(y^2+16)

2007-02-11 16:32:20 · 6 answers · asked by Anonymous in Mathematics

2007-02-11 16:31:53 · 3 answers · asked by lorenzo p 3 in Medicine

2007-02-11 16:31:03 · 1 answers · asked by adictpunk04 2 in Physics

FOR MATH!!!!

2007-02-11 16:29:06 · 2 answers · asked by Anonymous in Mathematics

Two astronauts, each having a mass of 75.0 kg, are connected by a 10.0 m rope of negligible mass. THey are isolated in space,orbiting their center of mass at speeds of 5.00 m/s. calculate
A)magnitude of the angular momentum of the system by treating astronauts as particles
and B) the rotational energy of the system. by pulling on the rope, the astronauts shorten the distance between them to 5.00m
C)what is the new angular momentum of the system?
D) what are their new speeds?
E) what is the new rotational energy of the system?
F) how much work is done by the astronauts in shortening the rope?

XD i have been working on it all weekend..and i cant get it..can someone help me figure it out please T_T

2007-02-11 16:27:50 · 2 answers · asked by Becky 2 in Physics

answers:
8
4
0
-8

2007-02-11 16:26:57 · 11 answers · asked by tia 1 in Mathematics