Physics - December 2006

2006-12-04 06:50:29 · 6 answers · asked by Anonymous

Well, that´s about it, I´d just picked a glass (made of a very thick glass by the way, about 2,1 mm or so) for I was going to have a drink in my place, and then, as soon as I got the glass in my hand, It felt to be actually "undoing" itself into fine grains of glass. The glass was of a fair quality. It had been in my possession for more then ten years and I used it very often, probably everyday, I still have four more just like it. It had absolutely no scratches nor had it ever fallen to the ground or anything that could have compromised it´s physical integrity. When I got the glass I made absolutely no pressure on it, it was empty, for I was going to get a bottle of coke, and then it turned into dust right there in my hand. HELP! WHAT THE *@#$ WAS THAT? I don´t know, I figured it might have something to do with estatic electricity, but I can´t explain it. Can someone tell me what happened?

2006-12-04 06:35:17 · 2 answers · asked by Anonymous

i know that nasa has a vessel using ion propulsion to move since ion propulsionis self sustaining, in space wouldnt it always pick up speed if left on? couldnt this end up being a time travelling vehicle?

2006-12-04 06:29:12 · 2 answers · asked by Richard C 3

If i drive a car at higher rpm and follow a diesel with a trailer to reduce the drag of air like in nascar where they follow real close (but im not intending to drive that close) :P or lower rpm and not following anything?

2006-12-04 06:09:35 · 5 answers · asked by Blaman1 2

we consider now only the particle aspect of the photon. we know that through an electron and a positron colliding, we get at least 2 photons. does that mean that we can approximate the ray of the photon with the ray of the electron?

2006-12-04 06:08:33 · 3 answers · asked by Anonymous

I've performed an experiment with oscilloscope, applying 10V P-P sine wave and then plotting the voltage across resistor (current) and voltage across diode (voltage) in XY mode of the oscilloscope. The IV curve in 100Hz was quite different than the IV curve in 5000Hz. Any theoretical explanations.

2006-12-04 06:05:47 · 2 answers · asked by The Potter Boy 3

I have the flu and have been browsing through this question in my physics book, trying to beat boredom...

I have the answer, but not sure if it is right...

2006-12-04 06:02:42 · 2 answers · asked by Miss LaStrange 5

generates 0.01 W/m^2 at 19 m at a frequency of 4 kHz. Assume the speaker spreads its enegy uniformly in 3 dimensions.

A) What is the total acoustic power output of the speaker in units of W?
B) At what distance will the intensity be at the pain threshold of 8 W/m^2 (in units of m)?
C) What is the intensity at 12 m (in W/m^2)?

2006-12-04 05:45:22 · 2 answers · asked by Anonymous

If the design of an inductor calls for 80 turns of .5mm wire around a 40mm OD iron torroidal core, how do I calculate the inductance in mH or uH?

This isn't a homework problem, I'm building a circuit that calls for this inductor and I want to know what the resulting inductance is so that I don't have to build the inductor myself. I want to purchase one pre-wound.

2006-12-04 05:30:07 · 1 answers · asked by skim_halo 1

It drops into a ramp of height h.
The ramp forms a trough that guides the ball upward at an angle of theta with respect to the horizontal. At height n, the ramp ends.
At a distance d, there is a landing pad.

If the landing pad is positioned at exactly the right position so that the ball is only traveling horizontally, what is the height of the landing pad above the end of the ramp (a)?

Here's a picture
http://i142.photobucket.com/albums/r88/odu83/untitled.jpg


Calculate the height if h=4m,n=2m amd theta =45 degrees
use the 9.81m/s^2 for gravity.

2006-12-04 05:29:16 · 4 answers · asked by odu83 7

2006-12-04 05:23:10 · 5 answers · asked by Anonymous

2006-12-04 05:21:17 · 3 answers · asked by Anonymous

2006-12-04 05:18:42 · 5 answers · asked by Anonymous

?

2006-12-04 05:16:31 · 2 answers · asked by dudez 1

number 1 in my attacks on statements that are stupid
as in ........ (physical object of choice ) is infinite
IF IT WAS THERE COULD BE NOTHING ELSE
and yes the UNIVERSE IS INFINITE - it IS all time and space
CONCEPTS can be infinite - as in numbers

2006-12-04 05:14:45 · 5 answers · asked by Anonymous

Always peanut butter&jelly side down for me! You too, I bet! Two insistent theories I've heard: (1) gravity favors the peanut butter&jelly side, makes it tend toward the floor [makes sense] or...(2) bread starts spinning; number of spins leaves peanut butter&jelly side down depending on height of drop [no matter whether peanut-buttered and jellied or not...]

One place you'll find (2) in print is page 91 of "mental_floss presents: ...Condensed Knowledge"

What think?

2006-12-04 05:01:36 · 2 answers · asked by fjpoblam 7

if something stops instantly upon contact with another object, will the speed at which its travelling affect its stopping time?

2006-12-04 04:58:24 · 10 answers · asked by mezigi 2

2006-12-04 04:48:50 · 3 answers · asked by Miss LaStrange 5

what is the world distribution of helium? if u know, please tell me, thanx!

2006-12-04 04:13:46 · 3 answers · asked by litostrawberrie213 1

2006-12-04 03:51:18 · 2 answers · asked by donna c 1

2006-12-04 03:48:00 · 7 answers · asked by hello motherhood!!! 1

this is a physics question please give me a detailed answer

2006-12-04 03:43:13 · 3 answers · asked by oli 2

The coefficent of static friction between the floor of a truck and a box resting on it is 0.38. The truck is traveling at 79.7 km/hr. What is the least distance in which the truck can stop and ensure that the box does not slide?

2006-12-04 03:35:51 · 2 answers · asked by Anonymous

Which is better Use of legender's polynomials or Bessel's functions?

2006-12-04 03:25:52 · 1 answers · asked by Let'slearntothink 7

A Baseball is dropped from rest from the top of a roof and fell 10 meters to the ground. Assume up is the positive direction. What is the average velocity of the baseball during the free falling motion?

2006-12-04 03:03:41 · 3 answers · asked by larkinfan11 3

How many digits should appear in a result expressed in the proper number of significant figures in 6.02 X 10^23 X 16.00 X 1.660 X 10 ^ -24 ?
Please explain how u worked out the problem

2006-12-04 02:49:50 · 4 answers · asked by Fatima 1

energy as in the voltage going through our nervous system .... however minute it is in the great scheme of things; don't the laws of physics say energy can't be destroyed only be transferred (not the right word, i know) and nerve impulses are energy so where does it go?

2006-12-04 02:48:18 · 21 answers · asked by Part Time Cynic 7

Give the order of magnitude of 6.02 X 10^23.

2006-12-04 02:45:55 · 4 answers · asked by Fatima 1

2006-12-04 02:40:52 · 4 answers · asked by Samlovesjesea 1

2006-12-04 02:23:16 · 3 answers · asked by Anonymous