Physics - March 2007

2007-03-16 08:26:08 · 17 answers · asked by Sexxi Nera 1

i read that plasma is reffered to as the fourth state of matter ,
how many states of matter are there and what are they ?

2007-03-16 07:57:10 · 6 answers · asked by Anonymous

I read in my essentials of astronomy student reference book
that the sun consists of free electrons & atomic nuclei .

What do they mean by the word free ?

i know what the basic word free means but what do they mean by free electrons?

2007-03-16 07:54:56 · 5 answers · asked by Anonymous

In order to magnify an image seen through the telescope 100 times with the focal length of the primary objective of 800 mm we need an eyepiece with the focal length of

how do you figure this out(formula)

2007-03-16 07:50:07 · 3 answers · asked by Anonymous

2007-03-16 07:40:28 · 7 answers · asked by Zefram 2

2007-03-16 07:27:44 · 5 answers · asked by ken ben 1

the constant 'force' of magnets fascinate me.

2007-03-16 07:23:58 · 2 answers · asked by Jimguyy 5

I know you can't really answer that question but its weird!

2007-03-16 06:58:07 · 22 answers · asked by Xx-Zowie-xX 2

A beam of light is incident from air on the surface of a liquid. If the angle of incidence is 30.0° and the angle of refraction is 19.0°, find the critical angle for the liquid when surrounded by air.
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A speeder tries to explain to the police that the yellow warning lights on the side of the road looked green to her because of the Doppler shift. How fast would she have been traveling if yellow light of wavelength 579 nm had been shifted to green with a wavelength of 552 nm? (Note that, for speeds less than 0.03c, Equation 21.32 will lead to a value for the change of frequency accurate to approximately two significant digits. Accordingly, please enter your response to 2 significant digits.)
please help,, i have no clue.......

2007-03-16 06:51:05 · 2 answers · asked by lol 1

It's for a school project. How do doctors use physics?

2007-03-16 06:38:42 · 6 answers · asked by pshhhbiteme 1

The visible range of the electro-magnetic spectrum, we all know is the detectable light with all its colors from 380nm to 740nm.

ROY G BIV, Is it just me or does anyone else question why indigo is considered a class of color just like red,green etc...? To me I can hardly see a difference from blue. It seems the color spectrum goes from violet to blue. Indigo looks like blue to me. I see know real difference to merit another name for a hue that isn't that distinctive or even there at all.

2007-03-16 06:37:42 · 3 answers · asked by Anonymous

You know in science places you see those things that make sparks jump from one thing to another. Am i right in saying that you need high voltage for that rather than high current? or am i complety wrong?

2007-03-16 06:03:11 · 3 answers · asked by Sean G 3

2007-03-16 05:58:51 · 6 answers · asked by Anonymous

2007-03-16 05:57:31 · 4 answers · asked by jbg 1

can someone giv me a hand in explaining what moles are, and how you work out how many moles there are per ml(or wateva) coz we did it in science today and im not completely sure about it...can someone explain kinda the whole topic in kinda easy-to-understand terms

thanx xxxxxxxxx

2007-03-16 05:24:52 · 5 answers · asked by **Twinkle <3 2

2007-03-16 05:18:39 · 2 answers · asked by karen m 1

What is the difference between the film caps and the disk capacitator?
In other words, why would one choose one over the other in a circuit?

2007-03-16 05:08:55 · 3 answers · asked by Anonymous

Aren't their black holes in the center of stars ? Isn't it an equal balance of Gravity and Nuclear Reactions ?

2007-03-16 05:08:14 · 4 answers · asked by Anonymous

2007-03-16 05:06:10 · 5 answers · asked by *sumASTRONAUT* 1

If you stood inside a sphere and the inside was covered in mirror.. what would it look like?

2007-03-16 05:04:44 · 9 answers · asked by Elsie 3

2007-03-16 04:53:11 · 1 answers · asked by Anonymous

2007-03-16 04:49:35 · 3 answers · asked by Anonymous

HELP

2007-03-16 04:41:42 · 4 answers · asked by roopali b 3

Find the charge Q that should be placed at the centre of the square of side 1.00E+1 cm, at the corners of which four identical charges +q = 3 C are placed so that the whole system is in equilibrium

the figure of the question : http://www.upload-picture.com/viewimage.php?file=/images/nws42291.gif

any one could help me pls ???

2007-03-16 04:39:37 · 3 answers · asked by Anonymous

A sound wave radiates from a source in all directions. If the power of the osund source is 200 watts, then the intensity level of the sound wave 100 m from the source is, in dB??

please help, thanks!!

2007-03-16 04:36:01 · 2 answers · asked by Anonymous

"As Tesla experimented with a 1.5 MW system in 1899 at Colorado Springs, he was amazed to find that pulses of electricity he sent out passed across the entire globe returned with “undiminished strength.” He said, “It was a result so unbelievable that the revelation at first almost stunned me.” This verified the tremendous efficiency of his peculiar method of pumping current into a spherical ball to charge it up before discharging it as a pulse of electrical energy, a “longitudinal” acoustic-type of compression wave, rather than an electromagnetic Hertzian-type of transverse wave."



I'm sure tesla was talking about Longitudinal waves when he invented his wireless transmission of electrical energy. If no one has ever successfully reproduced his expirment, how do we know wireless is impossible?

2007-03-16 04:12:53 · 2 answers · asked by nikola 1

i know 1 billion =100 crores

2007-03-16 03:56:35 · 14 answers · asked by kum 1

if coyote starts off at rest 70 m from edge of cliff the instant roadrunner zips by in direction of cliff and moves with constant speed find the minimum speed roadrunner has to reach cliff before coyote.

2007-03-16 03:54:16 · 3 answers · asked by celticevening 1

Say, if i had one speaker playing at mid-volume, and it couldn't be heard 200 metres away but could be heard on max volume. If i had, say, 5 or 10 or 100 of the same speakers stacked together playing at mid volume. Will it be heard 200 metres away? It will be louder when you're close to it, but will it travel further with more speakers?

2007-03-16 03:45:24 · 3 answers · asked by Joseph 2

I'm doing a short particle physics course, and I just can't make this add up... I'm told that a proton is about 1GeV, and up & down quarks are ~0.005GeV, so I don't understand where the extra mass-energy in a proton comes from.

2007-03-16 03:36:15 · 6 answers · asked by Flup 5