Physics - September 2006

2006-09-21 03:29:45 · 13 answers · asked by Ahmed Yar K 2

2006-09-21 03:28:57 · 16 answers · asked by Andy 1

If the Law of Conservation of Momentum is to be obeyed, both these situations have external interactions taking place. But what are the, and what causes them?

2006-09-21 02:58:10 · 3 answers · asked by Kaity 2

if E = hc/lambda
and E= mc^2

a photon with wavelength 546nm.

am I right in saying m = h/(lambda x c)
= 4.05^-36 kg
???

2006-09-21 02:53:46 · 8 answers · asked by benabean87 2

2006-09-21 02:36:24 · 10 answers · asked by Anonymous

If I have for example kg m^-3 and I have a sum which involves (kg m^-3 x m x m) does this make kg m^-5 or does it cancel to kg m.

2006-09-21 02:22:06 · 5 answers · asked by jenny w 1

My wife has taken more physics classes than I and is better at math than I, but still we have a bet. Help if you can.

I say that if the Earth started spinning faster and faster eventually the centrifical force tangent to the surface would overcome gravity and everything (people, cars, bodies of water) would be thrown off the planet like a giant Merry Go Round.

She says (I don't understand this) that if the Earth started spinning faster it's gravity would somehow become stronger and we'd all be stuck to the surface, unable to move.

I don't know the math in this but I'm sure I'm right. Could someone give me the equation to prove to her? Thanks a mil.

2006-09-21 01:52:48 · 13 answers · asked by Anonymous

Pls help! I need info urgently!

2006-09-21 01:38:29 · 7 answers · asked by princess 3

2006-09-21 01:27:39 · 18 answers · asked by Joyal P 2

1) Why does the resistance of a light bulb, connected to a capacitor in series, decrease as a capacitor is charged in a circuit?

2) What is the physical meaning of scale factor, pertaining to capacitor?

2006-09-21 01:20:01 · 2 answers · asked by vegetto1126 1

Come on, lets have some really imaginitive answers...

2006-09-21 01:14:27 · 23 answers · asked by Grinner5000 4

2006-09-21 00:54:56 · 12 answers · asked by Anonymous

Speed of a ray of light is different in different mediums and it reduces as it enters a denser a denser medium.
suppose we have a glass slab and now a light ray enters into the slab, as a result its speed will decrease... so again if we give energy to this ray and increase its speed to that of the light in vaccum and then again if we change the medium from glass to vaccum...
what will happen?

2006-09-21 00:35:40 · 7 answers · asked by go4sambhav 1

plut is a dwarf one.

2006-09-21 00:03:20 · 13 answers · asked by Anonymous

I know it seems like a funny and silly question but, I am serious! lol.

When we hold a book, our hands are holding it against the gravitational force of the whole earth (WHOA!) which has only been made possible by the electrostatic force between the charged constituents of our hand and the book at the surface in contact.

I know electromagnetic force is intrinsically so much stronger than gravity and that's what keeps us from collapsing.

But, shouldn't the electrostatic forces cancel out each other as the book and our hand are *almost* electrically neutral?

And even if they don't, why is electrostatic force *in this particular case* always negative (Attractive)?

There HAS to be an answer because gravity hasn't collapsed my chair or me yet. What force counters gravitational attraction? What makes it work in the opposite direction of gravitational attraction?

How did you like the question?

2006-09-20 23:10:17 · 12 answers · asked by Abhyudaya 6

2006-09-20 22:29:09 · 8 answers · asked by Scott S 1

Can anyone give me any situations/examples of the laws of motion? Seperate situations for each law please. :)

2006-09-20 22:22:14 · 6 answers · asked by Galadriel 3

2006-09-20 21:56:24 · 7 answers · asked by Princess 2

2006-09-20 21:23:02 · 8 answers · asked by antony.thomas 1

Any material that reflects infra-red spectrum very efficiently ? And cheap

2006-09-20 20:31:51 · 3 answers · asked by Just_curious 4

2006-09-20 20:04:54 · 9 answers · asked by Anonymous

2006-09-20 20:03:49 · 9 answers · asked by suresh s 1

I'm familiar with the collapse theory and the universe slowly speeding away from us.

2006-09-20 19:55:04 · 2 answers · asked by kriend 7

2006-09-20 19:13:51 · 10 answers · asked by cemlyle 2

Are sunrises and sunsets the same or are they the reverse of the other. Look at a sunset. Are the colors you see in reverse order of a sunrise. And vice ad versa.

2006-09-20 19:06:05 · 9 answers · asked by J. 7

I'm working on my homework by myself, but I can't seem to figure out the answer to this question.
The physics book explicitly states "Electric field lines begin at positive charges and end at negative ones."
So, in the case of electric fields created by point charges - the answer is definately no.
However, what about in the case of a closed circuit?? Are the electric field lines of a closed circuit in the same direction as the current?

My Physics book doesn't really say anything about electric field lines in a circuit.

Any help would be appreciated - thanks.

2006-09-20 18:10:57 · 7 answers · asked by danelamont 4

at depth in cm below the surface of a fluid in density g/cm^3
a solid circular cylinder of lenght 10cm and radius 2cm has its axis vertical, and its top end is 15cm below the surface of a liquid of relative density 1.3.calculate the thrust of
A) the upper AND lower end of the cylinder due to the fluid

from the results deduce the loss of weight of cylinder on immersion in the fluid.

2006-09-20 17:55:43 · 2 answers · asked by queenie 2

Would you be pulled apart?
Would you float?
Would you be crushed?
???

2006-09-20 17:49:19 · 9 answers · asked by sallymathews21 1

I want billions of dollars and thought I could build a cold fussion power plant. Where should I start?

2006-09-20 17:25:19 · 7 answers · asked by Anonymous

Police find skid marks 28 m long on a highway showing where a car made an emergency stop. Assuming that the acceleration was -10 m/s^2 how fast was the car going?
Please show work.

2006-09-20 17:05:15 · 4 answers · asked by lorenzo p 1