Physics - July 2007

A negatively charged sphere and an insulating thread is lowered into the uncharged metal can standing on an insulating slab.

My question is: why is a metal can used and not like an insulating can?

2007-07-06 17:52:17 · 4 answers · asked by Chocolate Strawberries. 4

I am asking this question considering the phenomenon observed in the stream pouring out of a faucet (supposing it doesn't have an aerator).

While answering please take into account that I'm not very well versed in Fluid dynamics.
I would prefer answers without equations!

2007-07-06 17:29:10 · 4 answers · asked by Som™ 6

The most no-nonsense definition I've ever found is dS = δQ / T, which to me could as well translate to сяскыйкийуз!

2007-07-06 16:33:53 · 7 answers · asked by Fernando 1

.......in as much detail as u can

thnx

2007-07-06 16:17:16 · 8 answers · asked by RaZoR 2

if u place some water in a tray and turn on the sound of a speaker nearby,the water will start vibrating.

BUT if u replace the speakers with a torch light and flash it on the water,it'lll not vibrate........WHY?? both,light and sound,are waves.

if you're just gonna answer tht light acts a particle as well as wave,thn thnx alot! u can move on to another question without answering.
I need some xplanation on it

thnx a bajillion:)

2007-07-06 16:12:25 · 7 answers · asked by RaZoR 2

2007-07-06 15:55:19 · 6 answers · asked by Aidan M 1

2007-07-06 15:48:46 · 3 answers · asked by higs_field 2

2007-07-06 15:02:43 · 10 answers · asked by Gypsy Gal 6

I think this is primarily a thermodynamics question but I am open to other kinds of scientifc explanation. Please do not give a global warming answer unless you can explain the mechanism or pont to the physical issues behind the locational shifts resulting in more flooding in some places and the growth of desertification in other places. I ask this Q seeking better answers than I have so I can explain the reason for the difference to others better than I can. This is a scientific Q, casual A's just don't cut it.

2007-07-06 14:16:44 · 5 answers · asked by Anonymous

2007-07-06 14:01:27 · 15 answers · asked by Calgarian_man 2

^^^^^^^^^^

2007-07-06 13:50:51 · 9 answers · asked by Anonymous

2007-07-06 13:28:51 · 7 answers · asked by snishry 2

What are are the theroys on how a black hole works, and what happens when you go through one? How are they created? Is there any estamites on how many are in the universe as of now?

2007-07-06 13:24:27 · 5 answers · asked by Anonymous

If I was traveling @ the speed of a bullet & shot it from the front of the plane to the back then the bullet would travel at the speed of a bullet relative to inside the plane, however if I stuck my arm outside the plane & fired backwards then surly the bullet would just fall to the ground as the forward speed of the plane would be equal & opposite to the backward speed of the bullet relative to the Earth?

2007-07-06 12:54:35 · 4 answers · asked by Simon M 1

The speed of anything is limited by physical properties, usually resistance (resistance of the air, resistance of the ground).

What is the physical property that limits the speed of photons in space?

2007-07-06 12:22:31 · 7 answers · asked by Ejsenstejn 2

Perhaps it is merely a perception problem. Perhaps all things are points but "behave" like strings because the universe is rocking. So the points are percieved to be strings when examined.

2007-07-06 09:31:53 · 4 answers · asked by Anonymous

I really need the answer to this pendulum problem ASAP. Thank you so much!

A pendulum of length L has a bob of mass M at the end of it. The bob is attached to a spring that has a force constant k. When the bob is directly below the pendulum support, the spring is unstressed. Derive an expression for the period of this oscillating system for small-amplitude vibrations (assume there is no displacement from the horizontal). Suppose that M = 2.80 kg and L is such that in the absence of the spring the period is 2.90 s. What is the force constant k if the period of the oscillating system is 1.45 s?

2007-07-06 08:29:16 · 4 answers · asked by YoDaddyHoe 1

2007-07-06 08:27:49 · 10 answers · asked by Cyprus.1 2

2007-07-06 08:07:54 · 7 answers · asked by Anonymous

ok, what would hapen if i shot a bottle rocket into a thunderstorm, and a milisecond before the rocket exploded, lighning hit it. then the rocket, with the lightning's energy corsing through it, explodes. would the lightning magnify the explosion, cancel it ot, or would the explosion be the same. I know it would never hapen, but im curious.

2007-07-06 07:29:57 · 10 answers · asked by cdeed 2

1. When solids are dissolved in a liquid the solid take up the spaces between the liquid molecules. If I have 2 containers and I dissolve 50grams of salt in one and 50 grams of sugar in the other, which container would provide your aluminum block with a greater buoyancy force (assume both completely dissolve)?
Help please!!

2007-07-06 06:27:35 · 2 answers · asked by NATTY 1

I read somewhere that we can't travel faster than the rotaion of the earth. But if we even go 1m.p.h in the same direction of it's rotation doesn't that mean we're going faster than it's rotation?

2007-07-06 06:19:23 · 6 answers · asked by dragon_wolf45 1

2007-07-06 06:19:01 · 5 answers · asked by Alexander 6

The cone is given a uniform surface charge density ( helpfull if calculated for uniform volume charge density also separately ), say sigma ( § ).

Use Gauss law if possible ( also I suppose that it would be easier with that with my experiance with tougher problems ).

The slant height is l
The base radius is R
The height is R
The field there is E
The potential there is V

Use the above variables ( preferably - no problem if you are using the variables of a previously solved question );

Thanks --- A dedicated student.

2007-07-06 06:02:36 · 4 answers · asked by Anonymous

or vice versa.

2007-07-06 04:54:01 · 5 answers · asked by Anonymous

If I throw a ball straight up with an initial speed of 35 m/s, how long will it take to return to me?

2007-07-06 04:42:41 · 4 answers · asked by Chablisah 1

and from there upward to many other places and
made secret camouflaged exits,
will the havoc occur around entire globe?

Should not we monitor that inportant juction
place more closely?

2007-07-06 04:42:10 · 10 answers · asked by Alexander 6

a) decrease by a factor of 1
b) increase by a factor of 1
c) remain constant
d) increase by a factor of 4

2007-07-06 04:11:35 · 8 answers · asked by Anonymous

please give me a scientific explanation rather than spiritual. i already know god made it that way, but he always works with
natural laws too.

2007-07-06 04:09:44 · 5 answers · asked by the lion and the bee 3

about the definition of amiciprism in the chapter refraction through a prism

2007-07-06 03:55:03 · 2 answers · asked by sagar 1