Physics - July 2007

2007-07-31 23:20:30 · 2 answers · asked by Anonymous

But during beta decay, a neutron decays into a proton, electron and antineutrino.
So this cluster of quarks is transformed into these new particles? A proton itself is made up of 2 up quarks and 1 down quark I thought, so how this decay phenomena is possible is not clear to me.
What is going on here?

2007-07-31 22:31:37 · 2 answers · asked by Anonymous

this question was asked in my halfyearly.
my answer was u= -nv

2007-07-31 22:28:28 · 5 answers · asked by VICKY 1

Find the x- and y-coordinates of the center of gravity of a 16-m by 16-m uniform sheet of plywood with a rectangle, that is 11-m by 5-m, removed from the upper left hand corner of the plywood. How do you find this??

2007-07-31 22:13:08 · 7 answers · asked by sdajc0603 2

2007-07-31 21:57:50 · 4 answers · asked by Danielle Go 1

2007-07-31 21:53:10 · 3 answers · asked by Danielle Go 1

Why was there a slight difference in time when the 2 objects hit the ground?

2007-07-31 21:49:59 · 5 answers · asked by jeska102 1

2007-07-31 21:34:55 · 4 answers · asked by Danielle Go 1

my msn messenger in remembering my id and password. i didn't allow the option but somehow it is like that. how can i make my comp. forget the password?

2007-07-31 21:31:12 · 4 answers · asked by welma 2

What are your views on time travel? Do you think it could be achieved by going faster than the speed of light? Personally I think that if we could travel faster than the speed of light we could slow time down for ourselves, and we would remain unaged while others continued moving and aging at a natural rate, but I dont think we could actually revisit Earth as it was at a previous time, and if we could, simply our presence there would alter the future, so we could never return to the time that we are accostomed to. What do you think?

2007-07-31 20:26:03 · 5 answers · asked by Amanda 1

Y = Wave function

A quantum system has a measurable property represented by the observable S with possible eigenvalues nh,where n = −2, −1, 0, 1, 2. The corresponding eigenstates have normalized wavefunctions Y n. The system is prepared in the
normalized superposition state given by

Y = 1/N [ Y-2 + 2Y-1 + 4Y+1 - 6Y+2]

where N is a normalization factor.

1.Calculate N

2. Write down the probabilityfor each of the following measurements of S
-h, 0, 2h

2007-07-31 20:24:40 · 2 answers · asked by walt 2

Dimensions and mathematics go hand-in-hand, and are - what, scientific observations, right? Therein lies my belief - they are simply observations of our surroundings. Dimensions are simply perspectives to classify objects, no? Sure, time and space supposedly existed long before humans were here, but we didn't know that before we came into existence, so how can we ever know? And where did this idea of higher-level dimensions even originate from?

2007-07-31 20:03:05 · 5 answers · asked by krneel128 3

I have no more than a novice level of expertise in this subject but have found it interesting for some years. In the mid 1970’s I had an inspiration based on an assumption that to have mass a particle has to bend all dimensions that makeup spacetime; at the time I was convinced there were only four. The logic was simple as good insights tend to be, if you look at a particle and remove one or more dimensions it doesn’t exist from our four dimensional perspective. Leptons I assumed traveled at the speed of light and had no mass; they behave as if they have mass in photovoltaic applications but the Lorentz transformations indicate their mass would be infinite at their native speed. I proposed that leptons did not exist in the “Time” dimension rendering them weightless, fast, and stable to the point of immortality. I assumed that all particles could be built theoretically from their dimensional qualities if we understood the dimensions in a better way.

2007-07-31 19:39:58 · 11 answers · asked by gnosticv 5

ok so some people at bungie found this equation for this ARG (alternet reality game) and we really dont know how to solve it or where to start really heh. so if anyone has some experiance in quantum mechanics please help. heres the link.

http://halo.wikibruce.com/Image:801snpow-behind.jpg

2007-07-31 18:44:38 · 6 answers · asked by william65132005 1

2007-07-31 17:21:03 · 6 answers · asked by Anonymous

A man 190 cm tall stands 2.5 m from a plane mirror. His dog, 30 cm tall, sits 1 m in front of him. What minimum mirror size is needed for the man to see all of his dog's reflection?


I got:
h=H * (i)/(i+o)
=.3m x (2.5m / 4.0 m)
h=.1875 m

But this does not take into account the man's height. Please help.

2007-07-31 15:43:48 · 1 answers · asked by Anonymous

I need to understand this as to why heat (also work) are considered path function. How do they have inexact integral? Kindly some one explain

2007-07-31 15:23:56 · 3 answers · asked by navya 2

I need to understand this as to why heat (also work) are considered path function. How do they have inexact integral? Kindly some one explain

2007-07-31 15:22:08 · 4 answers · asked by navya 2

the amount of heat required to change a solid to a liquid is called?

2007-07-31 15:12:02 · 5 answers · asked by Anonymous

2007-07-31 14:21:57 · 6 answers · asked by Bemo 5

i cant figure it out and my boytoy doesnt know. sheesh

2007-07-31 13:46:43 · 11 answers · asked by mookersgirl 2

A 2.0kg mass is traveling at 5.0 m/s on a smooth horizontal surface when it collides with and sticks to a stationary 6.0 kg mass. The larger mass is attached to a light spring of force constant 150 N/m. Find (a) the amplitude of the resulting oscillations of this system (b) the frequency and (c) the period of the oscillations.

This is the exact question that I have, there was no drawing formulas or other info provide to answer this question. Please help I need to know how to answer this question because it will be on a Exam.

2007-07-31 13:09:37 · 3 answers · asked by ~~052702~~ 3

2007-07-31 12:25:19 · 3 answers · asked by BenL 2

2007-07-31 12:19:54 · 11 answers · asked by Link 5

OK. So the earth is a perfect sphere and there are no issues with molten heat and such - this is all taken care of with very good insulation.

There is an open tube extending through the earth from the North Pole to the South Pole. Since the tube is through the axis of rotation - we can ignore any corriolis/centripital effects.

You drop an apple - or a billiard ball - into the tube - straight down so that it does not touch the sides - so we can dispense with any friction issues. And the tube is maintained at a vacuum - so we can dispense with any air resistance issues.

So, now that we have that down - we drop the ball into the tube - what happens? How does the ball behave as it falls toward the center of the earth, past the center of the earth, and beyond the center of the earth? How would it behave if we took air resistance into effect?

Enjoy!!!

2007-07-31 11:45:31 · 10 answers · asked by Anonymous

If I put a balloon full of air into a bucket of hot water, would the circumference get larger or smaller? Why?

And what about if I put it in a bucket of ice water, what would happen?
And why??????

Could you pleasssse help me?! Thanks so much and I will choose a best answer ASAP!!!!!!!!!!!!!!!!!!! =)

2007-07-31 10:46:01 · 2 answers · asked by louierockyjim 2

You are on a train that is traveling at 3.0 m/s along a level straight track. Very near and parallel to the track is a wall that slopes upward at a 12° angle with the horizontal. As you face the window (0.85 m high, 1.8 m wide) in your compartment, the train is moving to the left, as the drawing indicates. The top edge of the wall first appears at window corner A and eventually disappears at window corner B. How much time passes between appearance and disappearance of the upper edge of the wall?
___ s

2007-07-31 09:39:13 · 1 answers · asked by Antonio E 1

2007-07-31 09:34:58 · 5 answers · asked by dronebee91 2

I need to presence sense a row of several magnets (6-20, depending on the machine size) that are repeatedly placed onto and collected from a steel surface. I need to determine a "signature" of the magnetic field of the group, then check each time they are placed/collected to ensure that none are missing. Thought is to run a strip of the desired material close alongside the row, and check the resistance (signature) with an ohmmeter.

I'd also be interested in any other ideas to accomplish this.

Thanks in advance!

2007-07-31 07:38:33 · 3 answers · asked by tornwax 3

Well I was on a boat and the boat was going in...um...lets say west. And I was going to the opposite direction (East). So in going the opposite direction as the boat i go faster and if I walk in the same direction as the boat is then I'll go slower. (Remember that this is just a theory)

2007-07-31 07:23:52 · 6 answers · asked by catfight_007 1