Science & Mathematics - 6 February 2007

I need to know for my science fair project. Please and thank you

2007-02-06 13:31:18 · 3 answers · asked by Anonymous in Botany

2007-02-06 13:31:02 · 11 answers · asked by pjsbeach 2 in Weather

Can someone convert 925 square inches into square feet? Thanks for your help!

2007-02-06 13:30:19 · 4 answers · asked by I_hate_Hitler 1 in Mathematics

2007-02-06 13:29:40 · 1 answers · asked by Kushal B 1 in Mathematics

A 2.50*10^2-kg cast-iron car engine contains water as a coolant. Suppose that the engine's temperature is 35.0º Celsius when it is shut off, and the air temperature is 10.0º Celsius. The heat given off by the engine and water in it as they cool to air temperature is 4.40*10^6 Joules. What mass of water is used to cool the engine?

Please help me with this problem.
I can't understand this.

2007-02-06 13:27:46 · 3 answers · asked by swimmertommy 1 in Physics

2007-02-06 13:26:52 · 7 answers · asked by jessica w 1 in Chemistry

How is gold made? like Real gold. Not gold mining techniques, but how did gold just "appear" there? How was it made? Minerals? Chemicals? Rocks?

2007-02-06 13:26:49 · 12 answers · asked by bbygrl<3 2 in Earth Sciences & Geology

> i'm sure it'll take most of you less than a minute to figure this out... don't know how i just 'forgot', but oh well - i did!

when you have a number, then x and an exponent > how do you solve this simple equation? ex. 2x to the exponent of 2...? lol

2007-02-06 13:24:53 · 12 answers · asked by Anonymous in Mathematics

Please and thanks,

again, what are the resources of saturn? Water, carbon, air, etc? do you know any?

2007-02-06 13:24:18 · 3 answers · asked by Xiao 3 in Astronomy & Space

limit tan x
x-->infinity

what is the limit?

2007-02-06 13:23:55 · 5 answers · asked by Anonymous in Mathematics

If i think that the KAPLAN review MCAT book was easy will I do good on the MCAT test. They say that the MCAT test was made not for those people who know everything in biology,chem,orgo, and physics but was made to analyse a student's skills in using them analytically. What do you say?

2007-02-06 13:23:03 · 2 answers · asked by avalentin911 2 in Medicine

2007-02-06 13:22:04 · 2 answers · asked by MOVED! 5 in Other - Science

find the standard form of the equation of the line with the slope 2/5 passing through the point (8,-2).


pls explain stp by step THANKS

2007-02-06 13:20:55 · 8 answers · asked by Orange? 4 in Mathematics

an organic reaction to make sodium acetate and ethanol from ethyl acetate with sodium hydroxide resulted in a yield of 45% of sodium acetate.
a) write the balanced chemical equation
b) determine the mole ratio for the reaction
c) determine the mass ratio for the reaction

pleace and thanks

2007-02-06 13:20:33 · 1 answers · asked by Justine 1 in Chemistry

3. sin 2 theta = √3/2

7. sin² theta = cos² theta + ½

10. tan (x + 15º) = 3 tan x

2007-02-06 13:20:31 · 3 answers · asked by homeschooled 1 in Mathematics

in 50 or 100 years, d'ya think there'll be human relocations to other planets? what are the challenges?

2007-02-06 13:20:31 · 9 answers · asked by haru 1 in Astronomy & Space

Give a few reasons why the velocity of a stream might change over the course of a year. This change in velocity could account for the picking up and deposition of sediments along the channel of a river, not just as the river enters the ocean.

2007-02-06 13:20:23 · 2 answers · asked by harrypotteressence 3 in Earth Sciences & Geology

I need help on this question we are doing Mean and standard deviation here is the info.
Chocolate boxes- A family size box of chocolates is advertised as having approximately 50 chocolates per box. The freuency table shows the contents of 20 boxes.
Chocolates......# of boxes
48.........................2
49.........................4
50.........................6
51.........................5
52.........................2
53.........................1
How many boxes are within one standard deviation of the mean?

2007-02-06 13:19:39 · 3 answers · asked by Parmdeep G 1 in Mathematics

a. -1/2, 0, 2
b. -1/2, 2
c. -2, 1/2
d. -1/2

2007-02-06 13:19:34 · 5 answers · asked by Anonymous in Mathematics

2007-02-06 13:19:20 · 4 answers · asked by ashley f 1 in Engineering

You have two leaves, one kept in distilled water and the other kept in a saline solution (salt water). Based on your understanding of osmosis, in which leaf would you expect the stomata to open?

2007-02-06 13:18:47 · 2 answers · asked by asdfsadhfew w 1 in Botany

Hi. What is the cost/gram of tin?
And what are the good and bad points of tin?
Thanks in advance people! =]

2007-02-06 13:18:18 · 2 answers · asked by Aanchi11 2 in Chemistry

Of course I understand what function is but I don't understand how I do know which is function or not. for instance.. does x^2 + y^2 = 4 describe y as a function of x?
What about x^2 + 2y = 9??
y equals sqaure root by 4 minus x??

2007-02-06 13:17:39 · 6 answers · asked by starsgirl021687 2 in Mathematics

2007-02-06 13:16:04 · 4 answers · asked by Kevin G 2 in Botany

a=0.5bh for a triange b is base h is hieght right here they are b9 h2

2007-02-06 13:16:03 · 4 answers · asked by Jeff A 1 in Mathematics

2007-02-06 13:14:53 · 3 answers · asked by Anonymous in Geography

Against the current, it took a barge 4 1/2 hours to 9 miles upstream. it only took 1 1/2 hours to return at the same speed going downstream. Find the rate of the barge in still water and the rate of the current.

i only need the equasion and i can figure out the rest unless u feel like helping me

thank you

2007-02-06 13:14:39 · 5 answers · asked by *blonde*star* 1 in Mathematics

1. Why can genetic drift often lead to a reduction in genetic variation within a population?

2. Why are mutations by themself NOT considered to be a significant contributor to changing gene frequencies in a population?

3. What are 2 distinctive features that makes the Arthropod phylum DIFFERENT from Annelids,Mollusks, Roundworms,Sponges, Cnidarians, & Flatworms?

4. What's 1 function of the water vascular system?
---------
1-3 ???

4- Is locomotion one?
--------
I would really appreciate the help because I really don't understand the whole "genetic drift" concept, and my book is just confusing me. Thank You! = )

2007-02-06 13:14:08 · 1 answers · asked by Miss*Curious 5 in Biology

x+6y-2=0........how do i find the x-intercept?? Please explain the steps

2007-02-06 13:13:03 · 4 answers · asked by Anonymous in Mathematics

2007-02-06 13:12:56 · 2 answers · asked by Kevin G 2 in Botany