Physics - January 2007

a traditional explanation of light is a 2d wave with frequency measured peak to peak, amplitude trough to peak, direction in the viewing plane... my question is: when you rotate that plane around its axis, are there any measurable differences in that light or its effects?

2007-01-10 08:21:37 · 5 answers · asked by Anonymous

is it possible for us to see the sun before it actually rises sue to refraction? so..becoz the air is a denser medium and it keeps getting denser as u enter earth the rays bend inward..therfore viewing the sun before it actually rises..

2007-01-10 07:45:28 · 20 answers · asked by wildeyes2one 2

A shop sign weighing 201 N is supported by a uniform 129 N beam of length L = 1.70 m. The wire is connected D = 1.36 m from the backboard.
Find the tension in the wire. Assume the angle= 39.2°
Find the horizontal and vertical forces exerted by the hinge on the beam. (Use up as the positive direction.)

Where do you start on this?? I am so frustrated. My teacher gives us hardly any help on questions. He speaks abstractly and is confusing when does.

2007-01-10 07:39:44 · 6 answers · asked by beautyqueenjustine 3

...I was running on a treadmill on a train and looking out the window, but running in the opposite direction to that which the train was travelling?

2007-01-10 07:26:32 · 9 answers · asked by Gilligan 5

In quantum mechanics, superposition theory explains how an electron may occupy two distinct spatial coordinates concurrently. It seems to me that the implied assumption is that the quantum-level discontinuity is spatial. Why would it not be just as reasonable to assume the discontinuity resides on the temporal dimension, and that while the temporal relationship between location A and the observer, and location B and the observer is equivalent, that the temporal relationship between location A and B is not? In other words, from A with respect to B, the object does NOT exist at the same time. The temporal relationship between A and B may be other, complex, or non-existent? Any thoughts (and math!) to straighten me out?

2007-01-10 07:12:21 · 5 answers · asked by JON B 2

2007-01-10 07:11:47 · 21 answers · asked by twmsioncati 2

2007-01-10 07:00:39 · 11 answers · asked by Anonymous

And why is this?
Thanks for your help.

2007-01-10 06:25:44 · 32 answers · asked by monklane79 3

2007-01-10 06:24:03 · 2 answers · asked by Anonymous

2007-01-10 06:19:17 · 14 answers · asked by amit g 1

To remove the smoke, the driver opens his window just a bit. Explain why the smoke is drawn to and out of the driver's window....

2007-01-10 05:48:05 · 11 answers · asked by Vanessa M 1

2007-01-10 05:43:48 · 4 answers · asked by Genio 5

2007-01-10 05:35:20 · 14 answers · asked by Ryan H 2

doing a project and due tommorow

2007-01-10 05:10:44 · 15 answers · asked by Carmen S 1

2007-01-10 05:03:49 · 3 answers · asked by Anonymous

we have to make a sensor on our own for our physics coursework. the teacher gave us loads of ideas and i chose (now i'm wondering why i chose it) a concentration sensor. I decided to use CuSO4 as my salt whose concentration i'd measure using the sensor. I need to use a potential divider and a voltmeter in my sensor. what formulas would i need for calculating concentration of a salt from current, voltage and resistance? and how could i set my sensor up? any ideas at all as to any websites on sensors or anything helpful will be appreciated.

2007-01-10 04:55:00 · 2 answers · asked by amandac 3

2007-01-10 04:11:39 · 27 answers · asked by Harry Potter 2

Given speed of sound in air =340m/second and speed of lightin vacuum=3lakh kilometer per second

2007-01-10 03:59:58 · 5 answers · asked by bihariraja 3

pleeeeeeeeeeeeeeeeease heeeeeeeeeeeeeeeelp!!!!!!!!!!!!!

2007-01-10 03:39:07 · 6 answers · asked by gem--b 1

2007-01-10 03:23:11 · 5 answers · asked by munirlutfi 1

like we take it as (pie)/2 at extreme position, and sometimes, we write equations ignoring it totally.....how do i know when i gotta take it as zero....if its not specified in the problem?
i promise to select ur answer as the best if i am convinced.
thanks a lot for ur help....

2007-01-10 03:15:00 · 4 answers · asked by practico 1

plz explain clearly.....
thanks a lot for ur help........
i promise to select urs as the best answer, if im convinced.

2007-01-10 03:09:10 · 3 answers · asked by practico 1

2007-01-10 03:05:47 · 3 answers · asked by Anonymous

I'm trying to put my brain around magnetic forces. I get the whole magnetism things, opposites attract, like charges repel, etc....

I'm trying to put this in terms of a physical sense that I can relate to. For example: There is a large crate on the floor in front of me. I want to push this crate. I place my hands on the crate, my feet push against the floor, the force travels up my body to my hands and pushes on the crate, making it move!

Okay, with magetism, I need to understand what PHYSCIALLY pushes or pulls on magnets. Are there electrons flying back and forth pushing or pulling between magnets? What EXACTLY makes up the magnetic force?

In the electromagnetic spectrum, you have electrons and photons (I'm a little rusty but I think that's right), what is the magnetic force made of?

2007-01-10 02:48:22 · 8 answers · asked by CJP 3

2007-01-10 02:35:23 · 4 answers · asked by MOISES C 1

2007-01-10 02:23:17 · 2 answers · asked by siko 1

These are in physics, economics, etc

2007-01-10 01:28:46 · 3 answers · asked by chandro 1

2007-01-10 01:19:40 · 15 answers · asked by BHUSHAN C 1

2007-01-10 01:13:54 · 6 answers · asked by Anonymous

what is 25 degrees celcius in each of the three temperature scales?

2007-01-10 00:57:31 · 5 answers · asked by Anonymous