Physics - June 2006

Salt dissociates in water and the solution is then able to conduct electricity (ions). So whenever there is a storm at sea, if the lightning strikes water, how come the electric current doesnt travel up, for example, a cruise ship since it is metal, and shock ppl on board?
--fresh water doesnt conduct elect.

2006-06-26 08:08:40 · 12 answers · asked by rctfan8 2

I'm not a scientist or teacher but my theory is there was pressure buildup when the glasses cooled after being washed in hot water. I tried to pour hot water in the glasses to heat them up again but they remained stuck together. I know there is a science application to this problem but I'm not sure if heat expanded the glass or if it created the vacuum which caused the glasses to get stuck.

2006-06-26 06:54:39 · 10 answers · asked by Promdi® 4

I am making a model of the heating of silicon wafer... I am trying to figure out things that I should include in my model.
For now i have these things.
Heat transfer ( am doing this with finite elements steps)
Using black body radiation terms to show heat loss (i am modeling in vacum.

It is connected to a steel ring, so I have to have another term for that.

Is the a differance in thermal conductivity that depends on direction of heat flow???

any good ways to show that the conductivity changes with respect to temperature???

is there any thing else that I have not taken in to account???

any good advice from any one out there???

2006-06-26 06:32:45 · 3 answers · asked by farrell_stu 4

(b) How many joules of energy does it use in 15 min?

2006-06-26 05:56:45 · 5 answers · asked by russ23 1

difference of 100 V across it and also carries a current of 2 A. Compare the resistences, rates of flow of charge (current), and rates of flow of energy (power) in the two wires.

2006-06-26 05:53:27 · 5 answers · asked by russ23 1

draws a current of 4A at 120V and is 80% efficient?

2006-06-26 05:48:26 · 4 answers · asked by Anonymous

(b) the filament of a lightbulb in a car? (c) the secondary coil of a transformer? (d) the output of a battery charger? (e) an electromagnet?

2006-06-26 05:42:57 · 11 answers · asked by Anonymous

2006-06-26 05:38:21 · 8 answers · asked by Anonymous

when a proton moves past them? When they move past a proton?

2006-06-26 05:37:16 · 4 answers · asked by Anonymous

2006-06-26 05:34:55 · 23 answers · asked by juanalbertocespedes 1

or a south magnetic pole?

2006-06-26 05:34:26 · 6 answers · asked by Anonymous

And what would the formula be?

And so would it make much of a difference to switch to a 14W flourescent for example?

2006-06-26 04:08:28 · 5 answers · asked by ARL 1

2006-06-26 03:58:28 · 11 answers · asked by Anonymous

What is the density of a substance w/ a mass of 10kg in a 1m high container whose base has an area of 2m?

Please include a simple explanation.

Best answer and explanation gets 10 pts.

2006-06-26 03:31:17 · 6 answers · asked by Jed Stephen 3

2006-06-26 03:10:58 · 30 answers · asked by saadam313 1

physics

2006-06-26 03:03:08 · 7 answers · asked by Anonymous

2006-06-26 02:35:21 · 9 answers · asked by maureen029 1

mass is something which matter contains and also volume than whats the difference between them.

2006-06-26 02:26:10 · 16 answers · asked by josyula 2

Let's say the calibration of length, mass and weight

2006-06-26 02:18:03 · 4 answers · asked by JT 1

2006-06-26 02:10:26 · 6 answers · asked by maureen029 1

2006-06-26 01:19:40 · 6 answers · asked by Anonymous

2006-06-26 00:40:32 · 19 answers · asked by Captain Eyewash 5

2006-06-26 00:37:31 · 13 answers · asked by Anonymous

Science can allow us to prove, to demonstrate, to verify...but what can it say about the ultimate truth?

2006-06-26 00:18:28 · 3 answers · asked by Giulia82 1

It is a specific type of circuit used in Radio and Television

2006-06-25 22:49:30 · 2 answers · asked by adrianmx6 2

2006-06-25 22:48:26 · 11 answers · asked by smart 1

Assuming that time travel IS possible. Do his changes change history between point B and point A, or only from point A onwards, and would everyone have recollection of the two different histories?

2006-06-25 22:25:38 · 21 answers · asked by Anonymous

including why blood is red in colour?

2006-06-25 21:46:22 · 11 answers · asked by shahir_slh 1

If E=mc^2: algebraically, Vmax should = c^2, yes? Therefore, at any point for real physical objects, if c=299,792,458 m/s; c^2 = 89,875,517,873,681,800 m/s = Vmax(local), yes? ["(local)" is to acct for variable time]

Assuming a device could be constructed to produce a relatively stable gravitational distortion disproportional to (and much greater than indicated by) its actual mass (thus artificially slowing time locally for it), could that object and its artificial gravitational distortion be accelerated to or beyond c^2 relative to the faster time outside the artificial gravitational distortion?

Understanding that realization of the gravitational effect would include some delay, it seems at least superficially plausible foreign-body gravitational influence would be negligible.

For years, people thought the displacement hull was the only form for waterborne vessels; that's no longer true. The analogy is to accelerating a mass significantly beyond our perception of c.

2006-06-25 21:34:19 · 4 answers · asked by wireflight 4

2006-06-25 19:38:32 · 9 answers · asked by ash2524 1