Science & Mathematics - 2 December 2006

2006-12-02 12:37:53 · 10 answers · asked by michaeljoyzer 2 in Physics

A sphere of mass 0.3 grams is suspended from a 30cm cord. S steady horrizontal breeze pshes the sphere so that is makes an angle of 37 degrees with the vertical. Find the magnitude of the wind force and the tension in the cord.

Best answer gets 10 points!!
Please show how you got to the answer
Have Fun!!

2006-12-02 12:37:48 · 6 answers · asked by Brody 3 in Physics

I had a drink 10 mins ago, is it ok if I take some pepto bismol?

2006-12-02 12:37:34 · 9 answers · asked by ? 4 in Medicine

2006-12-02 12:35:43 · 4 answers · asked by Anonymous in Chemistry

how do you make a PERFECT poster? i need to make a poster about rivers or lakes but i chose to make a poster on rivers......how would i make a perfect poster with the topic being rivers?

2006-12-02 12:35:06 · 3 answers · asked by kogmu 3 in Other - Science

i have a science project and i need some help

2006-12-02 12:29:04 · 6 answers · asked by Kayla 5 in Botany

i get f'(x) = -2/x^3 f''(x) =6/x^4
f''(x) >0
6/x^4 > 0
and im stuck !!! ashamed. my calculator sais its not concave upwards at all ( when i look at the graph) . help me out thx

2006-12-02 12:27:33 · 6 answers · asked by biowolf89 3 in Mathematics

Idenify the type of Reaction & Balance these:
1) Al + O2 >>> Al2O3
2) HgO>>>>Hg + O2
3) NaOH + H2SO4>>>Na2SO4 + H2O
4) Fe + O2>>>>Fe2O3
5) Pb(NO3)2 + k2CrO4>>>>PbCrO4 + KNO3
6) H2 + N2>>NH3
7) C3H5(NO3)3>>>CO2 + N2 + H2O + O2
8) Fe + CuCl2 >>> FeCl2 + Cu
9) KCl O 3 >>> KCl + O2
10) Mg + HCl >>>H2 + MgCl2
JUST ONLY BALANCE THESE::
11) BaCl2 + H2SO4 >>> BaSO + HCL
12) P + O >>> P4 O10
13) KClO3 >>> KCL + O2
14) C3H8+ O2 >>> CO2 + H2O
15) Cu + AgNO3 >>> Cu(NO3)2 + Ag

I'n giving 5 stars if you answer all these good & all of these!

2006-12-02 12:25:43 · 3 answers · asked by truckin_90 2 in Chemistry

Oxygen is colorless (gas state), that's normal.

but Oxygen in liquid state become Blue.. how Oxygen become blue although Oxygen is Colorless in gas state?

2006-12-02 12:24:30 · 4 answers · asked by Hossam Ahmed 2 in Chemistry

There are 10 fraternity brothers at a shooting gallery at the state fair. Each brother is a perfect shot. Ten cardboard ducks appear simultaneously, and each shooter picks one of the ten ducks at random and hits his target. We will assume that they are allowed only one shot.

Simulate this experiment using a table or random numbers. Explain what will constitute a repetition.


I was thinking of labelling the ducks 0 to 9 and then picking a line from the Table of Random Numbers and using 10 digits and whichever numbers aren't present are the ducks that were not shot at. Is this right?

2006-12-02 12:22:06 · 3 answers · asked by Anonymous in Mathematics

2006-12-02 12:19:40 · 6 answers · asked by scoobydoocsi 1 in Engineering

suppose that the dimension of Span{u,v,w} is 2
is it then true or false that
(i) the system AX=0 has only the trivial solution
(ii) the matrix A is invertible
Justify your answer
(b) true or false: the sum of invertible matrices is an invertible matrix. justify your answer

2006-12-02 12:17:18 · 3 answers · asked by kondiii 1 in Mathematics

x=-2y+5

2x+6y=16

2006-12-02 12:16:20 · 11 answers · asked by Anonymous in Mathematics

ly.

2006-12-02 12:15:29 · 7 answers · asked by Ariana 2 in Biology

2006-12-02 12:15:17 · 5 answers · asked by styles4u 4 in Mathematics

2006-12-02 12:11:50 · 8 answers · asked by Christ' Soldier 2 in Mathematics

I have a B.S in physics but have never studied any math outside the usual calculus & differential equations core. For years I've thought it would be nice to know some topology. Mainly I'm wondering if the ideas in topology can be applied to some stuff I'm interested in.

Today I picked up a topology text in a bookstore and flipped through it. The introduction says there aren't any formal prerequisites for the subject, but it looks scary because a lot of the notation is unfamiliar. I could see it taking me years to decipher it.

So my questions are: how learnable is it, what's a good text, and is there a good informal monograph that covers the major concepts?

2006-12-02 12:11:29 · 4 answers · asked by grotereber 3 in Mathematics

2006-12-02 12:09:20 · 12 answers · asked by Roy 3 in Mathematics

2006-12-02 12:08:18 · 2 answers · asked by colakisses 2 in Botany

sin 2x=2 tan x/1+tan^2 x
sin 2θ/sin θ - cos 2θ/cos θ =sec θ
sin (x+y) cos (x-y) +cos (x+y) sin (x-y)=sin 2x
cos 2x=cot^2 x-1/cot^2 x+1

2006-12-02 12:07:14 · 4 answers · asked by Mike 1 in Mathematics

If on a calculator the answer is say .3 recurring. What if when you follow this through to the 3 millionth click, like I have done, it says .25, does that mean the batteries running out?????? Worried mathamatition....

2006-12-02 12:06:38 · 2 answers · asked by pop c 2 in Mathematics

1.8 km=____m

8.75 cm=____mm

400 m=_____km

68.04 mm=_____mm

600 km=_____mm

5.06 cm=_____km

3.2 km=_____cm

Y0U ARE MY HER0 iF Y0U CAN ANSWER THESE 8) i mean dang.. im SOOOOOOO confused! :D

2006-12-02 12:05:36 · 9 answers · asked by Anonymous in Mathematics

2006-12-02 12:02:07 · 16 answers · asked by MO 1 in Mathematics

For my science project have to have a page of facts and a picture of planet x. What's the best website to find this information?

2006-12-02 12:01:50 · 5 answers · asked by Jordan Taylor 1 in Astronomy & Space

I have to write a paper explaining why I belive the earth is round. I cant put things like I've seem pictures in a book.

2006-12-02 12:00:32 · 12 answers · asked by abdblu 2 in Astronomy & Space

i know how to get the circumferance of a cirlce, but i am wondering about how to find the inside area of the circle. my idea is probably multiply the radius of the circle by 180 and then times it by 2, since a cirlce has 360 degrees.

thanks for answering,

2006-12-02 11:59:43 · 10 answers · asked by sammy c 1 in Mathematics

2006-12-02 11:58:20 · 7 answers · asked by styles4u 4 in Mathematics

Running competitions may use a course that is 3 km, 5 km, or 10 km long.



Suppose k represents a distance in kilometers and d represents the same distance in meters. Write a formula for converting from kilometers to meters.

uhhh HELP!!

2006-12-02 11:57:24 · 4 answers · asked by Anonymous in Mathematics

im doing my science fair project on it, can you help me

2006-12-02 11:56:08 · 7 answers · asked by Anonymous in Earth Sciences & Geology

Write the chemical formula for each of the following compounds.

11. nickel (II) sulphite

12. cupric nitrate

13. ammonium phosphite

14. manganese (II) nitride

15. tin (IV) fluoride

2006-12-02 11:55:06 · 3 answers · asked by freindly asian 1 in Chemistry