Science & Mathematics - 16 January 2007

its school work.

2007-01-16 09:44:17 · 8 answers · asked by iloveyouu<3 1 in Geography

if a piece of hard white blackboard chalk is heated strongly in a flame, the mass of the piece of chalk will decrease, and eventually the chalk will crumble into a fine white dust. does this change suggest that the chalk is composed of an element or a compound?

2007-01-16 09:44:08 · 2 answers · asked by ashesanne 2 in Chemistry

2007-01-16 09:43:40 · 9 answers · asked by Hot I 2 in Astronomy & Space

2007-01-16 09:43:08 · 4 answers · asked by shesharya 1 in Mathematics

2007-01-16 09:42:41 · 13 answers · asked by Anonymous in Other - Science

A hip left halifax, for jamaica at 15km/h. 1 hour later, a second ship left halifax at 25km/h. After how long did the 2nd ship over take the 1st?

2007-01-16 09:42:30 · 4 answers · asked by Cutie 4 in Mathematics

2007-01-16 09:41:53 · 8 answers · asked by Kiki 1 in Mathematics

if 1=5 then


2=25

3=75


4=300


5=?

2007-01-16 09:41:48 · 4 answers · asked by chack 3 in Mathematics

Please show me the steps i will appreciate it.
1. x squared + 9x +20=0

2. 4m squared -9 = 0

3. x squared +2x=0

Also the question states , Write the equation if the solution set is (-2,3) What does this mean?and is a solution set possible?

2007-01-16 09:39:53 · 2 answers · asked by Anonymous in Mathematics

Can someone please tell me the algebraic rule for finding:

Triangular numbers
Rectangular numbers
Pentagonal numbers
Hexagonal numbers

2007-01-16 09:38:42 · 2 answers · asked by Nope 2 in Mathematics

Identify the products and write a balanced equation for the following neutralization reaction. It will be a double displacement reaction with water as one of the products.
HCl(aq) + Ca(OH)2(aq) ------->

2007-01-16 09:37:19 · 5 answers · asked by Anonymous in Chemistry

2007-01-16 09:37:07 · 10 answers · asked by manjit b 1 in Engineering

Predict the freezing point (in Celsius) of a solution of 5.0 g phenol in 100 g water. The Kf of phenol is 7.40 degrees Celsius (kg)/mole. I am suppose to use1 this equation: M=(Kf * g) / (ΔTf * G), but I need to solve for Tf instead of M. I really need some help on how to get started with this problem. If anyone could help, your response would greatly be appreciated. Thanks.

2007-01-16 09:33:03 · 2 answers · asked by maya 1 in Chemistry

MODULE M8-SECTION B

2007-01-16 09:32:56 · 13 answers · asked by saorfor 1 in Mathematics

Like who was the person that made algebra....and when was it invinted?

2007-01-16 09:31:50 · 2 answers · asked by Hot Stuff 1 in Mathematics

2007-01-16 09:29:40 · 11 answers · asked by themanwithnoname 2 in Physics

the limit of ((sqrt(5x^4+2x))/x^2) as x approaches infinity?
i know the answer is sqrt 5, but i cant seem to remember how to solve it.
lol, im reviewing for midterms which i have next week, and i totally forgot how to do limits which are like the easiest part of calculus...lol!
i actually find derivatives much easier :)
any help greatly appreciated.
thanks!

2007-01-16 09:29:32 · 4 answers · asked by Anonymous in Mathematics

change the weather screen to hayden, idaho

2007-01-16 09:29:16 · 5 answers · asked by marlene n 1 in Weather

I asked this question in science class... and my teacher didn't know. So he told me that he would give me extra credit if I found this out. So if you put a piece of steak in the middle of space, lets say for 50 years, would it of gone bad?

2007-01-16 09:28:55 · 7 answers · asked by Anonymous in Astronomy & Space

Hurry plz!

2007-01-16 09:28:46 · 4 answers · asked by Anonymous in Astronomy & Space

4 1/8 + 5 + 4 1/8+ 15 3/4 +15 3/4 +10 1/2 The anwser is 55 1/4. I need to see the work on how to do this specific problem only.

2007-01-16 09:28:33 · 3 answers · asked by Anonymous in Mathematics

I am trying to understand the following concept for my science class...
By referring to a specific pollutant, describe the way that acid rain gets made in the atmosphere using a word equation.
Thank you ahead for everyone that answers...it would be so helpful to me...

2007-01-16 09:26:05 · 2 answers · asked by lint 1 in Other - Science

2007-01-16 09:25:29 · 10 answers · asked by Hot I 2 in Astronomy & Space

2007-01-16 09:24:46 · 3 answers · asked by bklyn 1 in Mathematics

y=2cosx, 0≤ x ≤ pi/2. find the volume of the solid generated by revolving R around the y-axis by method of cylindrical shells

2007-01-16 09:23:40 · 1 answers · asked by bklyn 1 in Mathematics

There no other info then this.

The formula for the area of a triangle is A=1/2bh. Solve for b

2007-01-16 09:23:07 · 3 answers · asked by Cutie 4 in Mathematics

everything on our body serves a purpose... but why do guys have nipples?

2007-01-16 09:22:21 · 21 answers · asked by Loathing 6 in Biology

2007-01-16 09:21:00 · 1 answers · asked by OSUbuckeye3 1 in Other - Science

Given the cities and the populations below, use the hamilton method of apportionment to distribute 25 seats on a regional board.
City POP
Greenville 34,569
riverdale 27,943
oceanview 21,350
parkview 16,138

2007-01-16 09:20:50 · 1 answers · asked by Eugene D 1 in Mathematics

2007-01-16 09:19:41 · 1 answers · asked by Anonymous in Chemistry