Physics - August 2007

i need to know a good way to test this question. tell me any experiment that can support this question..

2007-08-19 16:27:49 · 4 answers · asked by Anonymous

What gases or vapors found inside a house or building (besides steam or smoke) have color and shape, and could float as an indoor cloud, fog, or visible indoor air mass?

Could static electricity somehow create such a phenomenon?
Have you heard of airborne dust in a room ever forming a floating cloud?

Any answer, thought, or idea as to the cause is appreciated.

Science, and/or science fiction possiblites welcome.

2007-08-19 15:48:37 · 3 answers · asked by AngeloElectro 6

I can think of ways it would explain some things, but what do you think?

2007-08-19 15:36:09 · 3 answers · asked by Incognito 7

Me = 5.97 x 10^24kg
Mm = 7.34 x 10^22kg
r=3.84x10^9m

F = G*Me*Mm/r^2
F = 6.67x10^-11(5.97 x 10^24)(7.34 x 10^22kg)/(3.84x10^9)^2
F = 1.98x10^18N

F = Mm*a
1.98x10^18N = 7.34 x 10^22(a)
a = 2.7x10^5m/s^2

v2^2 = v1^2 - 2ad
v2^2 = 0 - 2(-2.7x10^5)(3.6x10^9)
v2^2 = 1.94x10^15
v2 = 4.41x10^7m/s

a = v2 - v1 / t
2.7x10^5 = 4.41x10^7 / t
t = 163sec

SO, if Earth and Moon were completely still and if the moon wasn't orbiting the Earth, the Moon would hit Earth in 163 sec which is just under 3 min. But i don't know if I was correct in my calculations to make Earth a point reference.

Now the question, is the Moon's orbit around the Earth (constant free-fall) preventing the Moon from hitting Earth??

2007-08-19 15:31:27 · 5 answers · asked by Anonymous

-How does fireflies create light?
-If I kill it, will there be something like light bulb there?
-If there something like light bulb, can I use batteries to power it?

2007-08-19 15:20:06 · 3 answers · asked by SV650s 4

thermal conductivity is defined as:
k = [(Q/t)x] / AT where:
(Q/t) = rate of heat flow
x = thickness of material
A = cross sectional area of medium
T = temperature difference

Show that this is analogous to the definition of elecrical restivity p = (RA)/L = V/I A/L

2007-08-19 13:30:11 · 2 answers · asked by Anonymous

... G Forces upon players during a punt return?

http://sports.yahoo.com/ncaaf/news?slug=ap-ncaa-rules&prov=ap&type=lgns

He states in this article that it will increase G-Forces upon the players. But I'm thinking after accelerating over about 10-15 yards each player is going about as fast as he can.

So I'm not seeing a big difference in moving the kickoff 5 yards.

Does the perdue coach have some advanced knowledge of newtonian physics I am missing here?

2007-08-19 13:08:40 · 3 answers · asked by special-chemical-x 6

2007-08-19 12:31:57 · 4 answers · asked by BeachVol 1

2007-08-19 11:59:48 · 13 answers · asked by Ryan G 2

why cant you see the world spin when you are in a plane? Its probably a really obvious answer but this has bugged me since i was in school!

2007-08-19 11:42:11 · 7 answers · asked by Lianne R 1

2007-08-19 10:58:59 · 7 answers · asked by Anonymous

2007-08-19 10:28:37 · 8 answers · asked by Anonymous

re;- my big bang question

2007-08-19 10:02:50 · 16 answers · asked by Thor 2

i have pondered this question for ages. if the electromagnetic wave creates vibrations in all planes (unpolarised light) its more than likely light radiation displaces particles, and isnt that the definition of sound?

2007-08-19 09:43:01 · 12 answers · asked by lukeh466 3

Newton verified by Einstein propossed all forces are equal and opposite

2007-08-19 09:03:49 · 10 answers · asked by Thor 2

Near point of a person suffering from hypermetropia is 60 cm from his eye. What is the nature and power of the lens needed to correct this defect?

Please specify what would be the object distance and image distance and focal length and why???
Please solve the numerical in details with each and every step along with explanation.

Thanks...

P.S. The formula for lens is 1/v-1/u=1/f
here v= image distance
u=object distance
f=focal length
Power, P = 1/f

2007-08-19 08:56:39 · 1 answers · asked by Siddhartha 1

A car with an acceleration of 6m/s^2 exits the pit going 24m/s just as a car going 70m/s reaches the same location. If the car maintains it's acceleration, how long will it take to catch up with the other car?


Two men on horseback, 88 meters apart, accelerate toward each other. One going 0.2m/s^2 the other going 0.3m/s^2. Relative to the fastests man's starting point, when do they collide?

2007-08-19 08:54:44 · 3 answers · asked by dragonarigirl 1

2007-08-19 08:41:01 · 3 answers · asked by Anonymous

i want to try and under stand the daily readings which are given on the news.

2007-08-19 08:32:16 · 2 answers · asked by CLIVE W 1

2007-08-19 08:23:51 · 2 answers · asked by curiouslyclueless 1

Im in high school and I love science (.....math second) and I love to study and read about atoms and radiation and subatomic particles. So as a career I want to become a nuclear physicist b/c they study the atomic nucleus and all of the interesting features of it. But I may find math a bit fun but when I see the work mathematicians do it kind of scares me b/c I dont understand one bit of it and I just dont have the love for math to go that far into it. And I know Einstein and many other great physicists could do that kind of math. So do physicists have to know math that fluently?

2007-08-19 07:19:02 · 7 answers · asked by Anonymous

and why not rush and stick to the sun?

2007-08-19 06:55:26 · 10 answers · asked by Anonymous

2007-08-19 06:33:47 · 6 answers · asked by arslan 2

Would you consider this article as a reliable reference? If not, what do you see as the main limiting factors?

TELEPORTATION PHYSICS STUDY

http://www.fas.org/sgp/eprint/teleport.pdf

I am especially interested in the content (text) from pages 50/60 to 62/72.

Thanks in advance.

2007-08-19 06:27:04 · 3 answers · asked by Bob D1 7

I have asked for explanations and formuli and how you arrive at your solution[s].
NOT one person has worked this out--
they only indicate it sounds inefficient.
I am not interested in how something
sounds.
I am interested in scientific math;
algebra or calculus.
IF these things occurred, what would
be the scientific answer.
i gave specifics and I got back
maybe this and maybe that.
This won't work with that, period.
I need to know the why and why nots
analytically!
---
ship goes 16 kiilometers fast.
forget the size and length of the ship.
its top speed with diesel is 16.
NO other engines so far are faster.
------
it can add 3 other forms of propulsion;
sails, fans and photo cells.
if used alone they have specific
output speeds.
--
is there any combination or other
approach that will speed up the
ship [excluding jet propulsion] and
larger diesel engines?
[and keeping the weight the same].

2007-08-19 05:50:06 · 4 answers · asked by kemperk 7

What would be the estimated figures?

2007-08-19 05:48:15 · 1 answers · asked by Thop ite 2

i have made a crude potato launcher using pvc pipe, screws, 2-core speaker cable and a car battery. i have screwed two machine screws into the pipe so that the ends are very close (but not touching) and have the cable wrapped around the screws and hooked up to the battery at the other end. The idea being that i fill the pvc pipe with aerosol, turn on the battery, electrical charge travels up the cable, to the screws and jumps from one to the other, igniting the gas and launching my potato. my problem is im not getting a spark, what am i doing wrong? (the cable is touching both the pvc and the screws, would this create a problem)

2007-08-19 05:08:28 · 3 answers · asked by Anonymous

2007-08-19 04:24:59 · 17 answers · asked by Betty K 1

2007-08-19 03:52:00 · 2 answers · asked by mrsjoshgroban 1

2007-08-19 02:53:08 · 4 answers · asked by aman d 2