Science & Mathematics - 9 January 2007

A kite, 60 m above the ground, is moving horizontally at the rate of 5m/s. At what rate is the inclination of the string to the horizontal diminishing when 120 m of the string are paid out?

2007-01-09 02:42:01 · 3 answers · asked by Anonymous in Physics

Find: 6/7 - 4(3/5 + 6)

Which of the following is true?
A. The number 17 is a digit.
B. The set of digits is {..., -3,-1,1,3, ...}.
C. Zero is a member of the set of positive integers.
D. The digits are whole numbers from 0 to 9.

Simplify:
[5 (9 + 7)] + 4

Simplify:
-(-7) - 6(4 3)

Find the greatest common factor of 36 and 2

Simplify:
-(-8) - 9(10 6)

2007-01-09 02:41:24 · 7 answers · asked by frankie j 1 in Mathematics

there where no sections on philosophy so i have posted this question here and under maths

i am unsure so plez correct me if im wrong.

there is only one rule tautologys follow
- a tautology is only true if it contains no contradiction.

yet that rule is built using tautology,
i therefore ask is the non-contradiction tautology the tautology of tautology's.

2007-01-09 02:39:04 · 1 answers · asked by kevin h 3 in Other - Science

2007-01-09 02:38:41 · 7 answers · asked by Adrian M 1 in Medicine

2007-01-09 02:38:08 · 6 answers · asked by Anonymous in Engineering

2007-01-09 02:35:30 · 9 answers · asked by Bill B 1 in Mathematics

There must be other life! But I want to know what you think!

2007-01-09 02:34:25 · 10 answers · asked by ToTo 1 in Astronomy & Space

2007-01-09 02:34:09 · 2 answers · asked by Shek 1 in Biology

We all know that solar ecclipse is caused by moon. The same way when seen from the moon one can see the earth ecclipsing the sun at a particular point of time. How that ecclipse will look like ?

2007-01-09 02:33:05 · 4 answers · asked by Anonymous in Astronomy & Space

2007-01-09 02:32:16 · 6 answers · asked by Akshay 1 in Physics

i am unsure so plez correct me if im wrong.

there is only one rule tautologys follow
- a tautology is only true if it contains no contradiction.

yet that rule is built using tautology,
i therefore ask is the non-contradiction tautology the tautology of tautology's.

2007-01-09 02:32:11 · 4 answers · asked by kevin h 3 in Mathematics

2007-01-09 02:31:18 · 5 answers · asked by Janu 4 in Biology

what causes and is it possible to prevent ejaculation during sex

2007-01-09 02:28:11 · 8 answers · asked by kogi 1 in Biology

It appears I cannot convert my A/C freezer to a kerosene freezer because I have been told they use different technologies. Now would anyone tell me how to build a kerosene freezer?

2007-01-09 02:27:27 · 2 answers · asked by haroldezeugwu 1 in Engineering

2007-01-09 02:26:17 · 8 answers · asked by Jac 2 in Mathematics

i can use:
1 piece computer paper;1 piece construction paper; 10 popsicle sticks, 4 drink container lids; 1 coat hanger; 6 toothpicks; scissors and plies, and wood glue. the car has to travel 3 meters and must stay within a 1 meter wide lane. it will be blown by a box fan 9 times: 3 times on high, 3 times on medium, and 3 times on low. the fan can be placed anywhere behind the car before the trial begins. the faster it goes, the better. any ideas? would be appreciated. thanks.

2007-01-09 02:25:01 · 3 answers · asked by autumn123 1 in Engineering

Suppose i have a source of electro-magnetic waves. What happens to the environment around that source that makes the wave travel? Do the points around the source start to oscilate and what is the connection of the sinusoidal graphics of say the electric intensity of the field and the matter around the source. Is it correct to asume that at a certain moment each point is on a such sinusoide? I mean do points arounde the source move up an down in a sinusoidal manner, just like water does when you drop a rock? If not, then how on earth and what makes an electro-magnetic wave travel from A to B?

2007-01-09 02:24:13 · 4 answers · asked by Sticky 2 in Physics

Is their any theory that talks about how if we look at time on a line that their would only be past-time and future-time and the present would be the infinately small line that seperates the two. So our future depends mostly on our past and not the super-micro seconds that is the present

2007-01-09 02:24:01 · 25 answers · asked by joe56219 1 in Other - Alternative

I'm looking for the birth of the moon... when is it? is it in may or june? Please help!

2007-01-09 02:23:49 · 4 answers · asked by bluegeminitechs 1 in Astronomy & Space

2007-01-09 02:23:13 · 11 answers · asked by Davy Crockett 3 in Astronomy & Space

without any question, the digital age has a proof of the existense of other planets. what about those people in the past, what instrument did they use to convince us that such creations exist?

2007-01-09 02:22:13 · 6 answers · asked by curious 1 in Astronomy & Space

How much of a beam of randomly polarized light will pass through a pair of polarizers set at a45 degree angle between the two?

2007-01-09 02:21:53 · 2 answers · asked by kid_A 2 in Physics

i don't get how to do them here are a few of them

Factor:
15a^3-6a^2+18a

2a^4-18a^2

Write this square as a trinomial:

(6y + 7x)^2

2007-01-09 02:21:35 · 6 answers · asked by Anonymous in Mathematics

A toilet flush is operated by the compression of air. The air inside the flush has a pressure of 1.0 x 10^5 Pa and a volume of 150 cm^3. When the flush is operated the volume is reduced to 50 cm^3. The temperature of the air remains constant during this process. Calculate the new pressure of the air inside the flush.

2007-01-09 02:21:26 · 2 answers · asked by ♥♥♥shico♥♥♥ 2 in Physics

Measurements are a field of four different lengths.
51x25x34x36 all in metres
Please also let me know how to calculate.
Thanks In Advance

2007-01-09 02:20:44 · 13 answers · asked by Lochan 1 in Mathematics

I'm trying to do an astrology chart, but this is my first time and I can't figure out how to convert local daylight savings time into GMT.... any help would be really appreciated.

2007-01-09 02:18:39 · 4 answers · asked by ? 4 in Astronomy & Space

and how to classify it into constricted,normal or dilated??is there any such classification or is it just observer dependent judgement.
Please do give reference to your answer also.

2007-01-09 02:16:14 · 2 answers · asked by The White Light 1 in Medicine

Ok i posted before and I did all the sheet of my 30 questions on it and these two have me stumped any help would be great.

1. 20abc²/25bcd


2. x²-y²/6x+6y


Thank you for any help

2007-01-09 02:15:16 · 4 answers · asked by Anonymous in Mathematics

2007-01-09 02:12:52 · 9 answers · asked by shreya s 1 in Chemistry

Albert Einstein was probably the smartest person recorded in time that ever lived and yet he had a miserable life. What makes people like him continue their research? Would you consider this a life worth living for?

2007-01-09 02:12:16 · 5 answers · asked by popular_bond 2 in Other - Science