Science & Mathematics - 20 January 2007

x1(t), x2(t) are periodic
( x1(t) + x2(t) ) is aperiodic

2007-01-20 16:53:37 · 5 answers · asked by thawhizzhardhofhoz 1 in Mathematics

not much of the Northeast got too much snow this year and I'm sick of the Midwest getting all the snow. I'm a student and ya know sometimes a break would be nice..

2007-01-20 16:48:48 · 9 answers · asked by Jared O 1 in Weather

On the equator which way does the toilet water flush?

2007-01-20 16:47:02 · 8 answers · asked by noho09876 2 in Earth Sciences & Geology

it is white, and has two noticable imprints.

1) IP 137
or..possibly its...
2) 1P 137

and..

3) 800

it looks capsule shaped, yet it is not a capsule...

is this a lortab pill?

2007-01-20 16:46:40 · 4 answers · asked by Sam H 1 in Medicine

2007-01-20 16:45:52 · 3 answers · asked by jasmine 1 in Botany

2007-01-20 16:37:29 · 2 answers · asked by t.arun kumar 1 in Physics

2007-01-20 16:36:00 · 5 answers · asked by Peter W 1 in Zoology

245 mi on 11.2 gal of gasoline, what is the gas mileage in km/L? Can somebody tell me how the problem is set up and what the answer would be with the correct SF's? thanks

2007-01-20 16:35:09 · 1 answers · asked by nicki s 1 in Chemistry

Please ONLY answer with accurate responses....thank you very much!

2007-01-20 16:34:58 · 7 answers · asked by sex bot 2 in Biology

We may be defining "life" forces too slim and therefore bypassing instances of extraterrestrial forces of which we know nothing about.

2007-01-20 16:34:49 · 4 answers · asked by Robert L 3 in Astronomy & Space

the density of air at 25C is 1.19 g/L. WHat is the mass, in Kg, of the air in a room that measures 12.5 X 15.5 X 8.0 ft?
how would I go about this???

2007-01-20 16:26:34 · 7 answers · asked by nicki s 1 in Chemistry

A solution is prepared by mixing 74.0 mL of 5.00 M HCl and 36.0 mL of 8.00 M HNO3. Water is then added until the final volume is 1.00 L. Okay, I didn't quite get my first question and something strange is up with my scientific calculator, so I changed the numbers a bit just to confirm that I'm doing my calculations correctly...Please include the step by step calculations, thanks!

2007-01-20 16:23:36 · 1 answers · asked by Student_007 1 in Chemistry

Another Microbiology topic.

2007-01-20 16:23:05 · 3 answers · asked by Tee M. 1 in Biology

I am designing/making a model of a building which can be multiple stories. One of the requirements is that one room receive maximum direct daylight to the floor between 12 noon and 2p on Dec 21... which fascade should most windows be, how high, and which story should the room be on? I guess the location is in central IL.

2007-01-20 16:22:40 · 1 answers · asked by Anonymous in Engineering

From the following data, calculate the total heat needed to convert 0.219 mol ice at -6.50°C to liquid water at 7.26°C.

Melting point at 1 atm 0°C
csolid 2.09J/g°C
cliquid 4.21J/g°C
ΔHfus 6.02 kJ/mol

2007-01-20 16:21:58 · 4 answers · asked by Anonymous in Chemistry

2007-01-20 16:21:28 · 1 answers · asked by yew 1 in Engineering

thx!

2007-01-20 16:19:30 · 6 answers · asked by Anonymous in Mathematics

sound waves generally vibrate in the same place. the vibration has an effect on the nearby molecule and that vibrates and has an effect on the next. but soundwaves with high frequencies also follow the same principles when they CAN travel long distance with the energy they possess

2007-01-20 16:18:59 · 2 answers · asked by Anonymous in Physics

At 40°C, the value of Kw is 2.92 10-14. Furthermore, If the hydroxide ion concentration in a solution is 0.44 M, what is the pH at 40°C?

2007-01-20 16:18:54 · 5 answers · asked by Student_007 1 in Chemistry

2007-01-20 16:18:13 · 6 answers · asked by Anonymous in Earth Sciences & Geology

2007-01-20 16:17:49 · 5 answers · asked by Anonymous in Earth Sciences & Geology

It is said by Einstein that nothing can travel faster then light but it is not said that nothing can travel equivalent to the speed of light.
Is it possible for a person to travel in speed of light having a mirror in his hands & looking his own image?What type of image would that be?

2007-01-20 16:16:16 · 8 answers · asked by rajesh bhowmick 2 in Physics

I never got it!

2007-01-20 16:10:13 · 9 answers · asked by ZZ 4 in Mathematics

For a biology project, I need to research the public opinion on cloning.

Are you against it or for it? Please explain your answer. What do you think about whole-body cloning vs. organ cloning? If human cloning was made legal in the United States, what kind of laws should regulate it? How far should cloning go?

thanks for helping out. :D

2007-01-20 16:07:57 · 15 answers · asked by rantaroonies 2 in Biology

2007-01-20 16:07:27 · 7 answers · asked by ciscoan 5 in Engineering

Please slove:

A diver springs upward with a speed of 2m/s. The diving board is located 5 meters above the swimming pool, how long does it take for the diver to hit the water after leaving the diving board? Also how fast does she hit the water?

2007-01-20 16:06:53 · 4 answers · asked by GSU 1 in Physics

Please explain:

Using 334 m/sec as the speed for sound and assuming light travels so fast as to be considered instantaneous for this problem, what is the time delay between seeing a flash of lightning and hearing its thunder when the lightning strikes 3 km away?

2007-01-20 16:04:15 · 3 answers · asked by GSU 1 in Physics

Please explain:

A bullet is fired horizontally at 312 m/sec and when it enters a wooden block, it comes to a rest after traveling 4 cm in the wood. What is the magnitude and direction (relative to its initial velocity) of the bullet’s acceleration?

2007-01-20 16:03:47 · 1 answers · asked by GSU 1 in Physics

2007-01-20 16:03:29 · 6 answers · asked by Anonymous in Mathematics

Please explain:

An arrow is launched upward with an initial speed of 20 m/sec, how high (above the point of release) will the arrow travel?

2007-01-20 16:03:05 · 3 answers · asked by GSU 1 in Physics