Science & Mathematics - 2 October 2006

2006-10-02 16:27:25 · 2 answers · asked by kathy 1 in Earth Sciences & Geology

At what 2 angles could the nozzle point in order that the water would land 2.0 m away

2006-10-02 16:24:58 · 3 answers · asked by hydrantman001 1 in Physics

If light travels from fixed point A tofixed point B, A being in air and B in water, the route the ray chooses is completely different to that which it chooses if I, say, replace air with alcohol and water with glass. Both routes will not look like a straight line, for that matter. But still, this route will always be the most efficient one- Not too much time spent on the slow side and not too little time spent on the faster side- the ray always arriving at the quickest time it can to point B under the limitations. How is that explainable?

2006-10-02 16:23:41 · 2 answers · asked by Yankuta118 2 in Physics

Rochells class profess gives an A for average of 90 or better and B for average of 80 or better. She gets an 82,75,71 on midterms. If final is twice as much as midterm what must she get to get a B.and an A.max score on final cannot exceed 100. PLease help me out with how u got the answer

2006-10-02 16:23:02 · 4 answers · asked by vipr259 2 in Mathematics

Its like the government is condemning anyone who can be helped by this to death.

2006-10-02 16:21:25 · 15 answers · asked by pumpmar 2 in Medicine

2006-10-02 16:20:13 · 7 answers · asked by Anonymous in Weather

http://us.f13.yahoofs.com/bc/44436150me3e0859f/bc/My+Documents/Picture+1.png?bfwadIFBB1QyCb1K

I was hoping somewhat could explain to me how to do the above problem part A and B ( I know the answer to Part B is the last option)

2006-10-02 16:17:25 · 3 answers · asked by topgun553 1 in Physics

2006-10-02 16:16:56 · 13 answers · asked by mrdranoel 1 in Physics

1 x 8 + 1 = 9
12 x 8 + 2 = 98
123 x 8 + 3 = 987
1234 x 8 + 4 = 9876
12345 x 8 + 5 = 98765
123456 x 8 + 6 = 987654
1234567 x 8 + 7 = 9876543
12345678 x 8 + 8 = 98765432
123456789 x 8 + 9 = 987654321

2006-10-02 16:12:22 · 6 answers · asked by iamgood 2 in Mathematics

For example, Any valley near or at The South Pole?

2006-10-02 16:11:48 · 4 answers · asked by mtnotfool 1 in Astronomy & Space

i would like to find out which one of the following matrices is symmetric

-7 -8 5
9 7 9
5 -8 6



5 9 -7
-8 7 9
6 -8 5



6 9 5
9 7 -8
5 -8 -7

Any help would be greatly appreciated

they are all 3 by 3 matrices

2006-10-02 16:11:09 · 3 answers · asked by zz06 3 in Mathematics

2006-10-02 16:10:19 · 5 answers · asked by waterbaby 1 in Biology

what is the surface areas if the base area is b
what is the perimeter of the base

2006-10-02 16:09:14 · 2 answers · asked by aka_197 1 in Mathematics

If you want a carpet that is 9ft y 12ft, will it cost less to buy the remnant or to buy carpet a by the square yard

2006-10-02 16:07:01 · 5 answers · asked by aka_197 1 in Mathematics

is density a function of depth?

2006-10-02 16:04:38 · 5 answers · asked by ajflkajfsalkfsalkfna 3 in Physics

The perimeter of a rectangle is 162 ft. The lenght is 3 more than twice the width. Find the dimensions of the rectangle.

I kknow the first equation is 2L+2W=162 but i have no idea what the second equation is

(using sysytems of equation)

2006-10-02 16:03:50 · 6 answers · asked by Mia16 3 in Mathematics

Do they use it to make bullet proof glass?

2006-10-02 15:59:00 · 4 answers · asked by rlcrews2003 3 in Engineering

The diameter of the high powerfield is 420 micrometers
1) Under high power you observe that 6 leaf cells span your feild of view. What is tha actual size of one leaf cell.
2) You draw a diagram of a singal leaf cell. The lengh of your diagram is 7cm. What is the magnification of your diagram.
Any help would be appreciated I am horrible at biology.

2006-10-02 15:55:52 · 2 answers · asked by Anonymous in Biology

i need to know this for a quiz

2006-10-02 15:54:48 · 4 answers · asked by hidavedavid 3 in Biology

Sailboat Speed. The sail area-displacement ratio S provides a measure of the sail power available to drive a boat. For a boat with a displacement of d pounds and a sail area of A square feet. S=16Ad^-2/3
a) Find S to the nearest 10th for the Tartan 4100, which has a sail area of 810 square feet and a displacement of 23,245 pounds
b) Solve the formula for d

2006-10-02 15:53:50 · 2 answers · asked by racheldawnsmith311 1 in Mathematics

also please tell me what property allows carbon compounds to exist in a number of forms

2006-10-02 15:51:24 · 3 answers · asked by hidavedavid 3 in Biology

i planted the quarter 2 years ago. I KNOW IM NOT DUMB ITS NOT GONNA GROW A MONEY TREE.. i was just bored lol. my friends and i planted it at our old middle school. now we wanna go back and dig it up. will the quarter stil be there?

2006-10-02 15:50:44 · 8 answers · asked by cocomademoiselle 5 in Other - Science

A boy standing in a ditch throws a baseball upward toward his father. The ball leaves his hand at ground level, with an initial speed of 14.0 m/s, at an angle of theta = 61.0 degrees from the horizontal. The boy's father reaches up and catches the ball over his head, at a height of 2.0 m above the ground. The father catches the ball on its way down (as shown in the Figure). Calculate how long the ball is in the air. ( g = 9.81 m/s2)

Hint: You do not have to separate the upward and downward parts of this motion. You have enough information to find the horizontal and vertical components of initial velocity. You know the vertical displacment and acceleration. Be careful with signs.

2006-10-02 15:48:14 · 6 answers · asked by Jay 2 in Physics

2006-10-02 15:48:08 · 1 answers · asked by Bubbly Brain 2 in Physics

I need a simple example of "distribution negative binomial" focus in economy o business. Please I need really a hypothetical situation, just the problem.

2006-10-02 15:48:04 · 3 answers · asked by Ub 1 in Mathematics

If I were to remove a whale, dolphin, etc. (no fish, only marine mammals) from the water they would obviously die, even if they were fed well.

Why is that??? Is it simply because their skin dries out and the absence of water?

I mean they don't need water to breathe like fish, they have blowholes. So is it their skin???

2006-10-02 15:48:00 · 5 answers · asked by Anonymous in Zoology

also can u describe the structure of amino acids and proteins

2006-10-02 15:47:33 · 2 answers · asked by hidavedavid 3 in Biology

The sum of two numbers is 104. the larger number is 1 less than twice the smaller number. Find the numbers.

2006-10-02 15:46:13 · 7 answers · asked by Mia16 3 in Mathematics

2006-10-02 15:45:35 · 1 answers · asked by Anonymous in Chemistry

Iron Brass Copper
Mass (grams) 63.05g 48.10 63.40
Water (mL) 100mL 100mL 100mL
Initial water temp 21*C 21*C 21*C
Final water temp 66*C 72*C 63*C
Initial Metal temp 21*C 21*C 21*C
Final metal temp 62*C 68*C 58*C

change in temp metal 41*C 47*C 37*C
change in water temp 45*C 51*C 42*C

2006-10-02 15:45:30 · 1 answers · asked by Bubbly Brain 2 in Physics