Science & Mathematics - 27 January 2007

I've taught Math for 6 years. But this is my first year teaching Trig. I want to motivate my students to study harder than they've studied before. I'd like my students to have the best scores in the school. Any tips from veteran teachers?

2007-01-27 10:49:05 · 9 answers · asked by J B 2 in Mathematics

can 1000 as the sum of two positive integers, one of which is divisible by 11 and the other by 17?

2007-01-27 10:47:53 · 2 answers · asked by Anonymous in Mathematics

2007-01-27 10:45:48 · 4 answers · asked by hassan n 1 in Weather

a. 2 real, rational
b. 2 real, irrational
c. 2 complex
d. 1 real, rational

2007-01-27 10:45:28 · 5 answers · asked by Anonymous in Mathematics

Is it the force of the ground on him?
or the force he exerts on the ground?

2007-01-27 10:44:30 · 7 answers · asked by Sofia 1 in Physics

2H2(g) + O2(g) --> 2H2O(g) ΔH = −486.6kJ


Which of the following are true statements for the above chemical reaction ?


a) A phase change is involved


b) Two moles of hydrogen gas react with two moles of oxygen gas to
produce two moles of water vapor


c) Energy is absorbed by the system, the reaction species


d) If the reaction takes place at constant pressure, q = −483.6 kJ


e) ΔH for reacting four moles of hydrogen gas with two moles of
of oxygen gas is −977.2 kJ

2007-01-27 10:42:14 · 1 answers · asked by MARK 2 in Chemistry

2007-01-27 10:41:40 · 1 answers · asked by TyTw w 1 in Mathematics

The Line 3y+X=10 intersetcs the circle x^2 + y^2 = 50 in two distinct points

Find the coordinates of the two points of intersection

2007-01-27 10:40:20 · 6 answers · asked by Anonymous in Mathematics

a. the patient
b. the doctor
c. the insurance company
d. a third party

2007-01-27 10:39:04 · 9 answers · asked by Anonymous in Medicine

so there is a debate about 1.00 being exactly equal to 0.999........ (the nine repeating itself infinite times)

so algebraicly it looks like this,

1\3 = .333..... lets call the number this represents with "x"

(x) * 3 = __

if we plug in either "1\3" or ".3333...." for "x" the result should algebreicly be exactly equivilent, alas......

(1/3) * 3 = 1

however

( .333...) * 3 = .999.....

so you see, 1 should equl .99... exactly but, well how can they they are two different numbers...

personaly, i belive (1/3) does not equal .333.... and there lies the flaw of this debate.

2007-01-27 10:37:31 · 13 answers · asked by Anonymous in Mathematics

I want a site that draw the chemical formula for a compound of my choice, and perhapes also have a simple interface.

2007-01-27 10:32:32 · 2 answers · asked by Mohamed K 2 in Chemistry

Say it is regular piece of paper for a printer, but just an atom thin, how many times would you be able to fold it up in half?

2007-01-27 10:31:19 · 7 answers · asked by Terry The Terrible 5 in Physics

ok...

I have x^2 + 6x - 7 = 0

and

x = -b+/- √(b^2 - 4ac) / 2a

I get x1=7 and x2 = -1

but the book says -7 and 1

I get it negative and it says possitive

2007-01-27 10:30:07 · 8 answers · asked by Latina Hottie! W.Chocolate 2 in Mathematics

From a standard deck of 52 cards, how many different five card hands are possible if the five card hand must consist of

i)only spades or only red face cards?
ii) four jacks
iii) exactly three kings

please help thank you!

2007-01-27 10:28:32 · 3 answers · asked by Anonymous in Mathematics

2007-01-27 10:25:23 · 9 answers · asked by ? 5 in Astronomy & Space

like when they were sick..they could tell Ed and he could tell the vet the symptoms

2007-01-27 10:20:30 · 4 answers · asked by toni lee 3 in Zoology

Maths Questions Pretty Please..?
Could anyone please help me out, with the full working out and solution to each problem. thanks

QUESTION 2) Use the remainder theorem to find the remainder when 2x^4 - x^2 + 3x - 2 is divided by (2x-1)

QUESTION 3) When x^4 + ax^2 + bx - 2 is divided by (x-1) the remainder is -2, and when it is divided by (x+1) the remainder is -6. Find the values of a and b.

QUESTION 5) The polynomial x^3 +px^2+6 is exactly divisible by (x+2) and (x-3). Find the values or p and q.

QUESTION 7) If x^3 + 4x^2 - 3x +2 = (x+1)(ax^2+bx+c) + d for all the values of x, find the values of a,b,c, and d.

QUESTION 8) If x^3 + 4x^2 - 12x + 14 = x^3 + (mx + n)^2 + 5 for all the values of x, find the values of m and n.

QUESTION 9) If x^2 = a(x+2)^2 + b(x+2) + c for all values of x, find the values of a,b,c.

THANKS HEAPS IN ADVANCE..

2007-01-27 10:20:14 · 2 answers · asked by NFLS121a 1 in Mathematics

thx!

2007-01-27 10:18:46 · 1 answers · asked by lyxl_2005 1 in Physics

2007-01-27 10:14:45 · 8 answers · asked by JAMI E 5 in Biology

it's just a rectangle with two lines crossing each other from corner to the other. kinda like an x. then there is an 8 on one line and a 10 on the other.

2007-01-27 10:13:39 · 11 answers · asked by Anonymous in Mathematics

If a hen and a half lays an egg and a half in a day and a half, how many eggs would one hen lay in six days?

2007-01-27 10:13:18 · 34 answers · asked by Anonymous in Mathematics

2007-01-27 10:11:24 · 3 answers · asked by Lubna M 2 in Physics

2007-01-27 10:10:46 · 3 answers · asked by momrmb 1 in Weather

For example, every person has some chance of getting hit by a lighting, or winning a lottery ticket jackpot. I'm talking about the smallest possible odds that can happen to you. So wouldn't all the smallest odds that can happen to you with a normal life turn into 100% happening if you live forever?

2007-01-27 10:09:24 · 5 answers · asked by Believe me 3 in Physics

2007-01-27 10:09:23 · 7 answers · asked by Anonymous in Mathematics

Some ppl say that this is a fact, but I believe there's no such lake in this world!

2007-01-27 10:09:08 · 18 answers · asked by Anonymous in Geography

2007-01-27 10:08:21 · 5 answers · asked by prettyboy 1 in Biology

please help any answers will be greatly appreciated

2007-01-27 10:08:14 · 3 answers · asked by Anonymous in Mathematics

2007-01-27 10:07:45 · 28 answers · asked by Latasha G 1 in Physics

There is a lot of pictorial evidence to suggest otherwise:

http://www.apfn.org/apfn/moon.htm

http://space.about.com/od/astronomyhistory/a/moonhoax.htm

http://batesmotel.8m.com/

2007-01-27 10:07:18 · 21 answers · asked by Anonymous in Astronomy & Space