Physics - March 2007

a)doubled
b)unchanged
c)halve

2007-03-16 18:46:28 · 17 answers · asked by cesar i 1

answer options:
a.double
b.stay the same
c.halve
d.become four times as great

2007-03-16 18:41:36 · 4 answers · asked by cesar i 1

After the box is closed, the cat is said to be in a state of superposition of |dead> and |alive>. Now the person carrying out the experimnt peep into the box and find that the cat is alive. So, it is said that the act of looking causes the wavefunction of the cat to collapse and, in this case, it collapse to the |alive> state. When the box is closed again, the wave function of the cat starts to smear out and after a while one would say the cat is back to the superposition state of |dead> and |alive> again. Intuitively, this cycle can be repeated over and over again as long as the cat is still alive.

Now, if the person peep into the box and saw the cat dead. It is said that the act of looking caused the state of the cat to collapse to the |dead> state. But if the box is closed back, can one say that the cat is back to the state of |dead> and |alive>? If so, could it be possible that the next time someone peep into the box, the cat is back alive? If not, why is the there an asymmetry?

2007-03-16 18:38:36 · 3 answers · asked by sh 1

http://physicsweb.org/articles/news/4/7/8

Can someone explain this?

2007-03-16 18:26:51 · 6 answers · asked by Anonymous

Optional embeded second question, Why doesent the lightning rod melt?

2007-03-16 18:16:41 · 3 answers · asked by Pugsly 1

what is the capacity , in weight and voume of standard 20' container

2007-03-16 18:15:48 · 1 answers · asked by shy pie 2

in what way is the word "work" as used in everyday language the same as that defined in physics? in what way is it different?
can you give me examples of both? thank you~~

2007-03-16 18:10:02 · 5 answers · asked by Anonymous

I know that Force of the person pushing the car is equal to mgsintheta, but I don't understand why we use sine instead of cosine (Force of the person is an x component right??)

2007-03-16 17:54:56 · 3 answers · asked by Anonymous

lets say a gallon, not a lake or ocean.

2007-03-16 17:49:15 · 6 answers · asked by Pugsly 1

a) What is its efficiency?
b) It absorbs 100 J from the hot reservoir during each cycle, how much work does it do?
c) How much heat does it give off in each cycle?
d) What is the coefficient of performance of this engine it works as a refrigerator between these two reservoirs?

2007-03-16 17:25:54 · 2 answers · asked by bonjette 2

2007-03-16 17:21:46 · 9 answers · asked by paradigm 4

2007-03-16 17:20:23 · 5 answers · asked by Anonymous

do you think up multiple scientific questions in a day? like how do scientists know that the universe is an endless expanse and if you go in the same direction you will never come across the same spot ever? it would make up so much more sense if i go there. what are some of your questions?

2007-03-16 17:03:35 · 5 answers · asked by Anon omus 5

2007-03-16 16:58:18 · 7 answers · asked by qwerty u 1

Given that x=Acos(wt) is a sinusoidal function of time, show that v(velocity) and a ( acceleration) are also sinusoidal functions of time.

2007-03-16 16:33:34 · 4 answers · asked by Becky 2

A small ball is set in horizontal motion by rolling it with a speed of 3.00 m/s across a room 12.0 m long, between two walls. Assume that the collisions made with each wall are perfectly elastic and that the motion is perpendicular to the two walls.
(a) Show that the motion is periodic, and determine its period
(b) Is this motion simple harmonic? explain

umm i need help on this problem i tried for a couple days now and it still is not working for me. So if someone can help me solve it it would be great. Thanks

2007-03-16 16:31:37 · 4 answers · asked by Becky 2

I cannot figure it out. Energy can neither be destroyed, nor created, and can only be exchanged between two adjacent regions of space. I do not understand this concept. please i need help in understanding this.

2007-03-16 16:29:46 · 9 answers · asked by Anonymous

hey guys, could you expalin to me what the difference between angular and centrpietal accelleration is? all i rcan think of is that centripetal accleration is directed towards the centre :S im sure theres more lol
thanks!

2007-03-16 16:13:52 · 3 answers · asked by Anonymous

Just list some. I need some for a science project that I am going to do. Thanks

2007-03-16 16:04:38 · 7 answers · asked by Anonymous

I'm using a small CRT from a small TV. I was just wondering how hot the cathode has to get before it starts to emit the electron cloud. Any info on the topic would be very helpful.

2007-03-16 15:48:50 · 4 answers · asked by ExpErImEntEr 1

What could you put between a magnet to stop it from pulling on an iron material?

2007-03-16 15:44:59 · 5 answers · asked by Anonymous

More specifically, is there any type of converging or diverging lens - either meniscus, concave-convex, or plano-concave or convex, which, when you reverse the direction of light incident upon it, that it becomes either a converging lens instead of a diverging lens, or a diverging lens instead of a converging one? In other words, is a diverging lens always a diverging lens no matter from which direction you shine the light? Likewise, is a converging lens always a converging lens regardless of from which direction you shine the light?

Thank you!

Greg

2007-03-16 15:19:59 · 3 answers · asked by tangoprince 1

2007-03-16 14:53:57 · 2 answers · asked by Anonymous

travel faster than c? assume I have an understanding of basic physics and calculus, as well as a fundamental overview of elementary particle theory.

2007-03-16 14:46:18 · 3 answers · asked by Jay Z 1

what happens to our energy in our bodies that give us life when we die?

2007-03-16 14:26:13 · 7 answers · asked by Anonymous

I watched a video called "The Disclosure Project" it was very informative and enteresting. But in this video one of the speakers "Srg. Clifford Stone" spoke of "zero point energy." I would like some credited information on this subject. Maybe something that not everyone has seen. I looked it up and all I could find was conspiracy theories on why the government won't allow the public the truth about it.

2007-03-16 14:23:56 · 2 answers · asked by wondering 1

It's like lightening stricking water.

2007-03-16 13:25:24 · 2 answers · asked by James M 1

If all scietific principles are correct and each atom has an anti atom then since a black hole is an anti matter around a singularity then is there a opposite to a singularity that turns expels matter and light and energy like an opposite to hawking radiation where one attom turns into energy which is transferred to many more attoms .

is it plausible

2007-03-16 13:24:28 · 10 answers · asked by Anonymous

2007-03-16 12:48:49 · 11 answers · asked by Anonymous

2007-03-16 12:47:53 · 5 answers · asked by Anonymous