Physics - August 2006

2006-08-08 00:46:08 · 1 answers · asked by navigator 1

when using same amount of power.

2006-08-08 00:24:54 · 5 answers · asked by enord 5

since all the emotions in our body are caused by hormones and other chemicals secreted by our bodies in response to a range of sensory observations, could we not mimic these in artificial intelligence?

2006-08-08 00:11:57 · 5 answers · asked by de5tiny06 2

2006-08-07 23:58:35 · 21 answers · asked by Rainbows 1

I want to study physics and mathematics (double major) in the university but I also want to be very good at and learn a lot about computer science. How can I do that? Can I learn about computer science topics on my own?

2006-08-07 23:25:33 · 5 answers · asked by Anonymous

How does Heisenbergs uncertainity principle imply that vaccum is not perfectly empty but filled with fluctuations?

2006-08-07 23:25:08 · 8 answers · asked by Anonymous

And in which one should I get my B.Sc. degree in order to pursue a career in quantum computing?

2006-08-07 23:22:25 · 2 answers · asked by Anonymous

what is the meaning of the inner and outer radius of the hollow sphere ?

2006-08-07 23:01:05 · 4 answers · asked by Violet 2

2006-08-07 22:19:32 · 9 answers · asked by joy_blue03 1

2006-08-07 22:11:55 · 10 answers · asked by joy_blue03 1

2006-08-07 22:08:07 · 6 answers · asked by joy_blue03 1

A physics professor did daredevil stunts in his spare time. His last stunt was an attepmt to jump accross a river on a motorcycle. The takeoff ramp was inclined at 53 degrees, the river was 4 meters wide, and the far bank was 15 meters lower than the top of the ramp. The river itself was 100 meters below the ramp. Ignore air resistance.
a.) What should his speed have been at the top of the ramp to have just made it to the edge of the far bank?
b.) If his speed was only half the value found in (a), where did he land?

2006-08-07 21:57:34 · 2 answers · asked by just_askin' 1

Are their any specific dimensions. Has one tried to build and preserve something in such a structure? Does it get preserved? If yes why don't we use pyramids instead of a refrigerator?

2006-08-07 21:31:54 · 5 answers · asked by Abhinav B 2

If some one tells you that a certain magnet is 1000 gauss how do you know if they are being truthfull

2006-08-07 21:30:03 · 2 answers · asked by Realist 2006 6

Hypothetically: A hole is drilled directly and perfectly from the north poll to the south poll. A metal ball weighing 5 kg is dropped at one end (lets say the north poll). Describe exactly what would happen to the ball?

(Ignore air resistance and the fact that the ball would melt due to temperature)

2006-08-07 21:17:05 · 34 answers · asked by MojoFace 2

I have heard that electrons don't fall into neucleus because they are moving at high speeds, but from where do they get the energy to move at such high speeds and why doesn't this energy diminish.

2006-08-07 21:15:01 · 7 answers · asked by Abhinav B 2

yes or no
please explane

2006-08-07 21:14:11 · 7 answers · asked by Anonymous

...I'm still confused. I was reading about PIR, or passive infrared motion sensors on www.howstuffworks.com and how they cannot detect anything behind a window. The article states that glass is transparent to visible light, but opaque to infrared. If motion detectors are supposed to detect IR energy (heat) and IR energy can pass through glass as some people state, then how come motion detectors don't get tripped?

Another thing I read was about greenhouses, and how they work by trapping in long wave IR energy on the inside. In other words, the IR energy isn't able to go through glass.

Err, could someone please clarify this for me? Thanks!

2006-08-07 21:07:47 · 2 answers · asked by Sleepless Bookworm 2

Ok not much on this kind of science so bare with me but I was thinking about how wood is a non conductor of electricity. Well my question is why is lightening still able to tear down thru a tree and sometimes split the tree. I first thought that lightening couldnt travel thru wood so then I thought there is a force or inertia traveling with the bolt. so does that mean the inertia is traveling at the speed of light? Seems to me if it was then we could learn to travel that way one day. Now this may be totally off the wall but i had to ask

2006-08-07 20:56:31 · 3 answers · asked by mavrik999 1

please answer seriously

2006-08-07 20:12:26 · 7 answers · asked by Anonymous

imagine, that you have build a huge supercomputer which is able to simulate motion of atoms and waves in some small part of space. Now imagine that we have built exact model of spermatozoid and ovule and some necessary space around them.
Then if we run the simulation program it would be logical that after some time this model will become an embrion, even without our knowledge of how our brain works e t.c. just because of the laws of physics. And after some period this will become a human with the real intelligence. My question is, is there something wrong with this idea? Is it possible or am I missing something?

2006-08-07 20:02:38 · 3 answers · asked by Synaps 2

yes or no please explane

2006-08-07 19:52:11 · 3 answers · asked by Anonymous

This is not regarding about experiment, so it is not required. but if you need prove, very simple. Just think of a motionless ball being thrown into a pool of air current, how does the ball react? Does ball rotate 'oppose' to the direction of air current that contact (or exert higher pressure) to that of the ball surface first? No, right?
This concept applies to all physical concepts including magnetic induction too.
And so, actually if you study Fleming's RHR carefully, you'll realise it itself is already proved that 'opposes' in Lenz's Law of Magnetic Induction is wrong. And 'maintain' or 'hold' is more correct.

Above is the 1st step, 2nd step using Fleming's RHR will prove the mistake.

Just simply imagine a coin-shape magnet of 2 poles taking half a circle each, next using a cross-sectional wire going one complete round the magnet, and think how does the induction occur using RHR.
If you can understand fully, then you'll agree that 'opposes' is wrong.

Interesting?

2006-08-07 19:11:28 · 2 answers · asked by Kotami 1

1)
(a) What is the angular momentum of a figure skater spinning (with arms in close to her body) at 2.0 rev/s, assuming her to be a uniform cylinder with a height of 1.5 m, a radius of 12 cm, and a mass of 55 kg.
kg*m^2/s
(b) How much torque is required to slow her to a stop in 5.0 s, assuming she does not move her arms?
m*N
2)A uniform stick 1.0 m long with a total mass of 300 g is pivoted at its center. A 2.5 g bullet is shot through the stick midway between the pivot and one end . The bullet approaches at 250 m/s and leaves at 160 m/s. With what angular speed is the stick spinning after the collision?
rad/s

2006-08-07 18:40:22 · 1 answers · asked by Anonymous

2006-08-07 18:28:42 · 2 answers · asked by Raju.K.M 5

If somebody found there is a mistake in Lenz's law, then I believe there will be new laws appeared in magnetism.

2006-08-07 18:27:23 · 7 answers · asked by Kotami 1

Thanks to all answered my question. Lenz's Law does not affect our daily life till today but, only that Lenz's Law explained only what is being seen, not the actual behaviour on the induction takes place.
Aurthor D has mentioned the Lenz's Law and the word 'opposes', this is the key word in the law and this is more applicable for incoming magnetic field, how about leaving magnetic field?
[The circuit inducess a current such that the produced magetic field tends to maintain (or hold) the same as the leaving magnetic field]
'maintain' or 'hold' here means following the same magnetic pole as the leaving field, don't you think this a contradiction with 'opposes'?
Last year, I took about 6 months kept on going arround this law and found the contradiction or mistake/error within. If you are interested, send your email address to: amane@singnet.com.sg.
I'll send you the full explanation; bit long though. In it, it also proves the incompleteness of Fleming's LHR & RHR as well.

2006-08-07 18:19:37 · 2 answers · asked by Kotami 1

do Boeing plane or any jet planes can stand still in air atleast for few second couping up the gravitational force??
do any war planes in any part of world have this capacity if so by which mechanism they will sustain the gravitaional force???

2006-08-07 17:50:15 · 2 answers · asked by girish rasineni 1

2006-08-07 17:42:43 · 6 answers · asked by chris 1

maybe the reason we can't think of a Theory of Everything is because some of the things we need for it haven't been discovered yet!

2006-08-07 17:24:07 · 5 answers · asked by That one guy 6