Physics - December 2006

you have a bag of cotton and an iron bar,each indicating a mass of 100kg when measured on a weighing machine.in reality one is heavier than other . can you say which one is heavier and why?

2006-12-27 17:57:48 · 8 answers · asked by dhruv_dshmkh 1

point wise answers

2006-12-27 17:47:17 · 5 answers · asked by Anonymous

when electrons jump to a higher shell when they absorb photons and emit a color,does it mean electrons closer to the nucleus jump to outer shells..if so whats happening to the electrons in the outer most shell if anything

2006-12-27 17:40:14 · 4 answers · asked by Anonymous

2006-12-27 17:28:35 · 3 answers · asked by Anonymous

2006-12-27 17:23:45 · 2 answers · asked by MVK 1

attract or push apart stick to one another and onto metal.

2006-12-27 15:46:13 · 10 answers · asked by FrackO 2

is it because both its feet are at the same potential, but since every wire has resistance there has to be some potential difference between its feet .

2006-12-27 15:38:00 · 26 answers · asked by Anonymous

Take for example earth being cut into two equal pieces. If I leave a projectile then what will happen to this bob.

1) will it has an oscillatory motion in any direction

2) Will it spin at the center
e.g. Moon spins around earth and also rotates. But if we keep it between two pieces of earth it would only have a spinning motion.

It is open end answer. Please have a clear picture then only answer or mail me and ask for more clarity.

-Jaadu (Alias name)

2006-12-27 15:31:22 · 1 answers · asked by jaaduforu 1

either to travel back in time. If this is the case, what if any effect would this have on the past?

2006-12-27 15:16:58 · 5 answers · asked by Anonymous

i want to be a chemical researcher in the future, and i figure physics could help. what are the main things you do in physics? is it hard? are you glad you took it? what are other classes i could take to help me understand it more? i appreciate any help or answers! thanks a bunch, yahoo-question fanatics!

2006-12-27 14:30:35 · 12 answers · asked by Megan 2

2006-12-27 14:22:26 · 15 answers · asked by Rupa D 1

look at the aircraft CONCORDE for ex.(correct me if I mispell concorde). It can travel twice the speed of sound.

2006-12-27 13:26:19 · 14 answers · asked by Anonymous

If light consists of photons, whether they be vibrating strings, or "particles" of energy, what happens to it? For a hypothetical example: You have a light on in an enclosed room. If the light is absorbed into the surrounding matter (the walls) will there be any buildup of what the light is made from? If a photon changes physically and passes through the walls as something other than light, what becomes of it? On the other hand, if a photon contains only energy and no mass so that it just disappears after transferring its energy, how can it produce mass, such as an electron? I think in some ways string theorists have answers to these questions but parts of string theory are "way out there" and seem somewhat cultish. I tend to believe my eyes and things that can be tested. I'm just throwing this out there to see what your views are.

2006-12-27 13:06:18 · 3 answers · asked by al f 2

an eye dropper makes a small sphere of water when it (a water drop) falls through the air. a straw makes a larger drop. a sphere of water from a gardern hose makes a large drop. what is the largest drop that can be made that will still have the integrity of a sphere ?

2006-12-27 12:51:02 · 5 answers · asked by wizard 4

I = I(cm) + Md(d to square). It is right in the case that a body does not turn about its own center-of-mass axis, but about the other axis. If while a body turns about the other axis, it turns about its own center-of-mass axis. Then, I = ( I(cm) + Md (d to square) ) + I(cm). Is it correct?

2006-12-27 12:38:38 · 3 answers · asked by chuong l 1

So I'm holding a triple A battery between my middle finger and my thumb.


Apparently a small current of electricity is going through me. As I understand it that means electrons are being fired off in some kind of chain reaction. Also I find no difference between that and free radicals which are a chain reaction of imbalanced atoms stealing electrons. I can't see how an electron chain reaction can be polaried so I don't get why there's a + and - sign to the battery.


I can't picture any of it. Does stuff like electrolysis of water happen small scale too?

2006-12-27 12:21:55 · 3 answers · asked by Anonymous

Wouldn't that be easier and simpler? (I am aware that we lack a valdi metric for easy and simple)

2006-12-27 12:10:38 · 4 answers · asked by Ejsenstejn 2

There are many things to get done in this solar system,outside of a Relative Motion of -0- Vac. And on other planets.

Space thongs and capes sold seperate......................

2006-12-27 11:46:46 · 6 answers · asked by Anonymous

My girlfriend and I were watching Crimson Tide the other day, and it was rather hokey. We found ourselves disagreeing on the main argument of the film: do you launch a pre-emptive nucelar strike on other nuclear bombs if you were told to, but might have had the order recinded?

My girlfriend was of the opinion that you don't, because if a nuclear warhead destroyed the other nukes, they too would detonate. I was under the impression that unless the warheads were specifically triggered and the fusion/fisson process begun, exploding a nuclear warhead would cause no detonation. In which case, you could use a small, localised warhead to destroy all the bombs, and everyone is happy.

What happens when you destroy a nuclear weapon in such a manner?

2006-12-27 11:35:25 · 8 answers · asked by Lewisham 1

2006-12-27 11:10:57 · 10 answers · asked by Anonymous

Or is this "just" a model?

2006-12-27 10:53:51 · 7 answers · asked by Ejsenstejn 2

Or does it only have inferred mass, form its energy. If so, what is its energy?

2006-12-27 10:53:25 · 9 answers · asked by Ejsenstejn 2

What about 16ohm cabs? Can anyone shed some light on this? What about useing TWO cabinets of equal ohms? ARRRRGGGGH!!!!!

2006-12-27 10:47:57 · 4 answers · asked by Dick Haloren 2

When a gas is under pressure. I understand that it is the molecules moving that cause the pressure, where does this energy come from to move them, and why doesnt it die down

2006-12-27 10:15:08 · 4 answers · asked by Anonymous

Taking out complex factors such as elevation, wind, etc. how do you figure out how much altitude an object gets and how fast does it decelerate?

I shoot a ball weighing 1kg (2.205 lbs) at 100 meters per second (328.1 fps)straight into the air. How far up should I expect it to go assuming no other factors hinder it?

Hope that's enough info to get the idea of what I'm trying to ask. Also, I'm not a physics major so please don't get too technical.

2006-12-27 10:14:51 · 7 answers · asked by Warpdrive 1

I'm having trouble with deconvolution (*). Let f = g * h. Where the functions f and h are given by a gamma variate of form: a(x-x0)^b exp(-[x-x0]/c). here a,b, and c are constants. How would you solve for g? Is there a unique solution for deconvolution? Why does using the discrete fourier transformation not lead to the solution?

2006-12-27 09:53:35 · 1 answers · asked by Robert 2

2006-12-27 09:35:59 · 8 answers · asked by Rawkus 3

Can you give me a good example of a scientific theory that was once believed to be true but was later shown to be in error by another deeper theory. One example is the theory of relativity overturning Newton's laws of motion. Can you give me another example?

2006-12-27 09:10:53 · 7 answers · asked by Jeffrey K 7

A) 0.10Hz
B) 10 Hz
C) 1,000 Hz
D) 100,000 Hz

2006-12-27 08:19:57 · 6 answers · asked by Anonymous

A lay person like me needs an explanation. Einstein said that while the sun radiates it shades energy and with the result that its mass gets reduced in proportion to its energy released. Every energy has a mass and therefore every mass is a trapped energy. Can our mother star sun be compared to a light bulb? A light bulb also gives us light but can we say that it releases energy? And what happens when a bulb fuses? It releases more energy than it can itself survive its impact and therefore when it releases that substantial energy it extingishes itself.

2006-12-27 08:02:22 · 7 answers · asked by Justanian 1