Physics - April 2007

2007-04-12 09:41:02 · 4 answers · asked by stumped on physics 2

Alright, I have no idea how to do this, but I would like to try generate blue light at approximately 417nm give or take a few nanometers. How should I go about doing this? I'm totally lost.

2007-04-12 08:30:17 · 5 answers · asked by Nigel 1

Could you make one by altering the emmisivity in response to diurnal changes
(white cover during the day to reflect as much as possible, black cover at night to radiate heat?) Or the other way around (passive oven?) Obviously it wouldn't get colder than the surrounding air, but it would be better than nothing.

2007-04-12 08:01:15 · 7 answers · asked by theonlymaxsdream 2

2007-04-12 07:31:28 · 1 answers · asked by daisy 1

The puck moving with velocity v = 10 m/s hits the floor
at angle 45 deg and continues to move sliding on the
floor.

http://alexandersemenov.tripod.com/puck/...

Coefficient of friction μ = 0.3; g = 9.8 m/s².

2007-04-12 07:23:37 · 5 answers · asked by Alexander 6

I know that images are flipped upside down (vertically) when looking through a lens, but are they also flipped horizontally in a convex lens?

2007-04-12 07:11:00 · 1 answers · asked by Anonymous

How much total kinetic energy will an electron-positron pair have if produced by a photon of energy 2.40 MeV?

I would greatly appreciate any help anyone could give on this! Thank you!

2007-04-12 07:02:57 · 3 answers · asked by TMCO 1

An observer, moving at a speed of 0.995c relative to a rod measures its length to be 2.10 m and sees its length to be oriented at 30.0° with respect to the direction of motion.
(a) What is the proper length of the rod?
b) What is the orientation angle in a reference frame moving with the rod?

2007-04-12 06:51:57 · 2 answers · asked by grayshore 2

2007-04-12 06:25:16 · 10 answers · asked by The Don 1

2007-04-12 06:14:18 · 9 answers · asked by bombshellbeuaty 2

2007-04-12 05:58:53 · 2 answers · asked by aine c 1

Which is worse: a scald from 100 degree Celsius water or from the same amount of 100 degree Celsius water vapor and why?

2007-04-12 05:55:29 · 3 answers · asked by liz 2

2007-04-12 05:27:39 · 6 answers · asked by Anonymous

Shri Gosh's statement is brilliant, is it not?

http://www.hinduwisdom.info/Vimanas.htm

Unlike you, seems there are many educated "scientists" that agree with Gosh.

Soddy, and Oppenheimer, to name a few.

As recently as last year there has occurred revisions in your physics because it was wrong, yet you blindly act as cheerleader repeating the infallability of the flawed.

Is that proof of stupidity?

2007-04-12 05:16:32 · 5 answers · asked by Raymond 1

-I am a Salters Horners AS/A2 student doing my short writeup for my short practical (not the long one you do in A2).
I need to write about the Accuracy and Sensitivity. I remember they are different but i do not remember why.

HELP! the deadline is monday! Oh dear,

2007-04-12 05:14:09 · 6 answers · asked by Ben P 2

2007-04-12 05:08:40 · 6 answers · asked by DЭVILS_ADV0CATЭ ******************** ********** 1

the past? That eyesight, and other sensory apparatus, is to slow to capture real time.

2007-04-12 04:55:16 · 5 answers · asked by Raymond 1

then does that mean Black Holes don't exist because no one has ever seen one?

You are too dumb to answer this so don't try, just making a point.

If you defend the existence of a black hole your argument supports the UFO as well.

2007-04-12 04:48:23 · 5 answers · asked by Raymond 1

if you were to face 2 mirrors facing one another and look in them, is it possible to count the reflected mirrors? do they go for eternity or is there an actual stopping point???????????

2007-04-12 04:46:59 · 10 answers · asked by gubwv 3

for the past few days every time I touch something, I get or give a shock. The lightswitch, touch the animal, the tv, my mom, my daughter. its really starting to get annoying. Any reason why Im suddenly so electric?

2007-04-12 04:45:08 · 20 answers · asked by arae8419 3

2007-04-12 04:39:54 · 14 answers · asked by the_sailor 2

Multiple UFOs crashed in an area that has several ultra top secret military installations.
The military is aware of the extraterrestrial craft.
One such craft crashes in vicinity of Roswell, New Mexico.

The Military, being the Officers on scene, likely estatic and overwhelmed by the discovery announce that a UFO has been recovered. (Would not you also do so? Because there was no balloon to recover, they did not go there to get a ballooon, so for them, there was nothing to "cover up.")

Then the Military, realizing the gravity of the situation, was forced to quickly make a retraction. It was not enough to let the matter slide, they had to retract it.
Now if this was mogul, like spoonfed morons keep repeating,
How does claiming to the world that a UFO was recovered keep the matter secret , to allegedly avoid attention?
And Mogul was top sececret sensor platform, is then used to explain the Alien bodies by claiming they strapped dummies on a sensor platform. How dumb are you!!!

2007-04-12 04:23:52 · 6 answers · asked by raymond b 1

2007-04-12 04:16:34 · 5 answers · asked by bombshellbeuaty 2

the answer should be in refference to phycis

2007-04-12 04:10:56 · 3 answers · asked by Shivam 1

In a television set, electrons are accelerated from rest through a potential difference of 24 kV. The electrons then pass through a 0.28 T magnetic field that deflects them to the appropriate spot on the screen. Find the magnitude of the maximum magnetic force that an electron can experience.

2007-04-12 03:56:15 · 2 answers · asked by Alan l 1

Find alpha mas , the largest value of the angle alpha such that no light is refracted out of the prism at face AC if the prism is immersed in air.
Express your answer in degrees. Ignore any reflections from the surface BC.
here's the link to the picture
http://i54.photobucket.com/albums/g99/ca...
Light is incident along the normal to face AB of a glass prism of refractive index 1.58 , as shown in the figure.

2007-04-12 03:46:24 · 1 answers · asked by Anonymous

2007-04-12 03:44:59 · 14 answers · asked by Anonymous

2007-04-12 03:19:16 · 3 answers · asked by bombshellbeuaty 2

2007-04-12 03:17:39 · 2 answers · asked by Anonymous

2007-04-12 03:09:52 · 10 answers · asked by Patrick Cool 2