Physics - July 2007

Can anybody plz explain to me the difference between the anode and cathode in electrolysis, voltaic cell amd diode ??

2007-07-25 22:42:06 · 2 answers · asked by Sherlynn W 1

If you take a bowling ball and a ping-pong ball and dropped them in a vacum they would both fall at the SAME speed. Mass plays no part in the speed of the objects. So how in the world would one's mass have to be increased to achieve the speed of light? Gravity is a result of lots of mass, the bigger the mass the more the gravity. I can see incresing power to get closer to the speed of light but how does that increase one's mass? Does a car going at 100 mph have more mass than a car going at 20mph? It may have more energy but not more mass. Can someone help me with this or point me in the right direction?

2007-07-25 22:40:58 · 4 answers · asked by KELLY S 2

Greetings:

What is Light? Light is an EM-wave and particle.

What is an EM-wave? A wave that has an electric and magnetic component. If light is truely a binary operation (consisting of two individual physical fields) then why is it not possible to seperate each individual component into its most fundamental form? If there are physical restrictions on this process what are they?

And finally, in a philosophical sense, how can a concept rooted in experience be devoid of a temporal component? In other words, in the idea that light is an EM-wave (and particle) why is time not an essential feature of its description? As if to say, "Here it exists, but it does not relate to experience."

Please correct any conceptual mistakes made, and thanks for any well-meaning thoughts on this subject.

2007-07-25 20:41:35 · 5 answers · asked by reverendlovejoy75 3

vector a has magnitude of 5.2 unitsand its directed east.vector b has a magnitude of 4.3 units and is directed 35 degree west of north.By constructing vector diagrams,find the magnitude and directions of (a)a+b ,(b)a-b

ans me clearly

2007-07-25 19:16:53 · 1 answers · asked by sara a 1

An electric field passes through a dielectric medium....lets consider its intensity to be "Z". When this field passes through a dielectric medium what will be its intensity when it emerges out of the dielectric medium; just outside this medium?...in other words....what will be the intensity left when it move out of the medium on the other side?

Z/K?...where K is the dielectric constant

2007-07-25 18:56:15 · 1 answers · asked by Anonymous

consider weight of cage is x
weight of the bird is y

Would the weight sum up both

2007-07-25 18:23:08 · 8 answers · asked by Anonymous

Anyone?

2007-07-25 17:38:12 · 8 answers · asked by pdgsmr1702 1

if a_1 and d = -2 than what are the first 4 terms in the arithmetic sequence

2007-07-25 17:36:42 · 4 answers · asked by jessie0420 2

I poured some coke into a bowl and put it in the freezer, something I had done many times before to make a Coke-Slushie of sorts. Anyway, this particular time, I took the bowl out too soon and I saw that the coke was still liquid, but when I dipped my finger into it (to see how cold it was) the whole thing suddenly froze. It turned into ice right before my eyes, soft, mush-like ice. Is there a scientific explanation for this?

PS: I’m pretty sure I wasn’t hallucinating (like a dear friend of mine had suggested,) I’m also sure my freezer isn't possessed, I checked ;)

2007-07-25 16:45:29 · 10 answers · asked by Anonymous

"Peter and Danny are standing on a merry-go-round which is turning counter-clockwise, as viewed from above. Peter throws a ball directly towards Danny. Does the ball get to Danny? If not, where does it go?"
I think the ball could not goes to Danny because thier linear velocities are different.The ball doesn't have centripetal force, so it won't rotate. But then, where would it go? would it go depends on the position where the two boys stand? it's really confusing and I don't have enough of physics conception. Please explain to me in detail. Thank you.

2007-07-25 16:36:55 · 2 answers · asked by Anonymous

A d.c. motor draws a current of 50A at 230V. If 200W is dissipated in the form of heat in the motor, how much power is available for mechanical work?

2007-07-25 16:29:52 · 4 answers · asked by Anonymous

When I hit a ball on a wall, the ball comes back. Can somebody pl explain the physics behind. Why doesn't the ball just lose its horizontal velocity and drops down, or why doesn't it lose both its horizontal and vertical velocity and sticks to the wall.
Thanks

2007-07-25 16:13:25 · 2 answers · asked by learner 1

It's actually starting to interfere with some aspects of my life. Even my friends have taken visible notice of it, as in they won't let me near their computers. I'm aware that everyone has an electric feild around them but mines a bit (a lot) stronger then others it seems.

I can sit in front of my computer at home, and the screen saver will freeze. On my first ITC class I crashed four computers (one was the teachers) and that's not because I 'm bad with computers. I sat down in front my friends computer right after her mother used it (it was working fine) and then all these weird programs started popping up she's never seen before. Yesturday I screwed up the eclectrical system on our van, when I went to clean the window the lights came on.

It's driving me insane, and my sister won't let me near anything she owns that's electric, does anyone know of a way I can neautralize my electric field or at least dim it?

2007-07-25 15:59:22 · 1 answers · asked by Anonymous

What happens, when a spinning ball hits a wall.. and why so?
I can't seem to be able to understand the physics behind properly.
Thanks

2007-07-25 15:57:01 · 1 answers · asked by learner 1

Is it really being used for the next nuclear bomb? or was it isomer?

2007-07-25 15:43:51 · 6 answers · asked by geller 1

2007-07-25 14:47:23 · 1 answers · asked by Josh Muller 1

explain this phenomenon using electrical concepts:

you are scuffing your slippers across a very thick carpet. when you reach to turn on the t.v, you see a spark jump from your finger to the t.v

2007-07-25 14:04:50 · 3 answers · asked by M 3

2007-07-25 14:02:10 · 7 answers · asked by Anonymous

if compared the brain to a computers technicality, what would it be and assuming it did exist who many hours of manpower would it be needed to program such machine to do everything a brain does for a person in his/hers lifetime?
is it possible to calculate the answers?

2007-07-25 12:49:12 · 5 answers · asked by memuro 1

A friend of mine is a physics professor, and he challenged me to research the theory of relativity. I have never had any physics, but I have a pretty good head for math, I just have no background in physics at all. So can someone talk in general terms about this theory? Why is it important, how does it work, just some basic background so I have a foundation to go on. I want to understand enough to ask intelligent questions, and he can explain the more complicated aspects.

And if you have suggestions for websites that would be helpful I would appreciate it.

Thanks!

2007-07-25 11:23:24 · 7 answers · asked by smlingrl 2

.... And WHY? ... Please Elaborate!

2007-07-25 11:12:37 · 4 answers · asked by Anonymous

I found this video, can be seen here http://www.metacafe.com/watch/718152/how_to_turn_water_into_ice_in_seconds/,
that freezes a cup of water almost instantaneously. One of the posted comments explains the phenomenon, allegedly called Graham Shrinder Effect, but is not very clear. Is this something bogus or does the explanation make sense to anyone? It mentions this "deromindal corpus attraction" that I could find no reference of. Thanks.

2007-07-25 10:23:23 · 6 answers · asked by EverCrack 1

and I take a cherry and move it from equator to the pole.
It does not require any force or work, does it?

And then moment of inertia of the Earth (with the cherry) will decrese, and the speed of rotation will increase accordingly.

Will kinetic energy of roatation of Earth (with the cherry) increase, remain the same, or decrese?

2007-07-25 09:25:30 · 5 answers · asked by Alexander 6

how we can know the time difference between space time and time that on earth?

2007-07-25 08:47:52 · 3 answers · asked by dixitrajpara07 2

So i can see what it's like in 3000

2007-07-25 08:40:50 · 23 answers · asked by Anonymous

Let's say a planet is orbiting an unknown mass. If we know the amount of time it takes for the planet to orbit, the distance it is from the mass, and the mass of the planet, how can we calculate how many times the mass' mass is the planet?

2007-07-25 07:48:05 · 3 answers · asked by Anonymous

Like in movies...When traveling in outerspace, If it were possible to reach light's speed in a spaceship, how would they avoid running straight into a blackhole, asteroid, planet, Star, or whatever?

2007-07-25 07:00:09 · 5 answers · asked by Ben 1

I have two options--I can launch a rocket in Alaska, or near the equator in South America. Where should I launch it, and during what time of day? I'm thinking the rocket should be launched near the equator, because then I can gain the velocity of the Earth and save fuel. Is this correct logic?

2007-07-25 06:22:45 · 9 answers · asked by Anonymous

2007-07-25 06:20:46 · 7 answers · asked by fathin comey 1

2007-07-25 06:09:02 · 5 answers · asked by fathin comey 1