Physics - November 2006

When the net external force on a closed system is zero, it is described as
a) an isolated system
b) a normal system
c) motionless
d) non-accelerating

2006-11-25 05:45:15 · 6 answers · asked by lindi 2

2006-11-25 05:43:04 · 2 answers · asked by Anonymous

I have a basic idea about this but I want to see other people's take on it. It would also be helpful if you could explain how you thing photons are created.

2006-11-25 05:14:43 · 7 answers · asked by the professor 2

some things were in the the glass and I went to put a hair holder in the glass and it just exploded

2006-11-25 05:02:53 · 5 answers · asked by chante19772004 1

some things were in the the glass and I went to put a hair holder in the glass and it just exploded

2006-11-25 05:02:07 · 3 answers · asked by chante19772004 1

2006-11-25 04:17:06 · 16 answers · asked by anand 1

A helium balloon floats inside a motor-car whose windows are closed, and which moves in a straight line at constant speed. How will the balloon be affected if the car tuns to the left at constant speed?
(i) moves to the left, (ii) moves to the right, (iii) moves straight ahead, (iv) remains stationary.
Please consider the following cases: (a) the balloon is touching the car's roof, (b) the balloon does not make any contact with the car as it floats (a small weight keeps it from rising all the way to the roof.)
A brief explanation will be greatly appreciated.

2006-11-25 04:04:56 · 10 answers · asked by wisdom tooth 3

Theoretically, imagine a hole is to be drilled right through the centre of the Earth and right through to the other side. A heatproof casing is in place to stop collapse. If someone on one side of the Earth were to fall into the hole, where would they stop? Since someone falling in the other side would also fall downwards, does this mean that there is a point of gravitational freefall in the centre of the Earth's core?

2006-11-25 03:37:08 · 8 answers · asked by Anonymous

2006-11-25 03:23:35 · 21 answers · asked by dtechpaper2002 1

2006-11-25 03:13:04 · 13 answers · asked by arthi s 1

what position would you use if you didnt want to use up much of your energy? it relates to physics in particular

2006-11-25 03:07:54 · 3 answers · asked by shaun Craig Marshal 1

Explain in scientific terms please ...

2006-11-25 02:49:04 · 10 answers · asked by Anonymous

Any links or books on the subject of temperature on water pressure (in its fluid form) would be greatly appreciated. My 8th grader is doing aproject on this so It would be great if the pages weren't over the top complicated.

Thanx in advance

2006-11-25 02:32:46 · 3 answers · asked by thav 1

2006-11-25 02:26:29 · 8 answers · asked by djtzclark 3

Black absorbs all the light, so how do we see black things?

2006-11-25 02:16:53 · 28 answers · asked by Arunava 1

Can anybody give an explanation in simple tterms ?Thanks in advance

2006-11-25 02:16:29 · 4 answers · asked by Padmini Gopalan 4

It is a common knowledge that fire cannot exist without oxygen; however, there is always an exemption from any rule.

2006-11-25 01:09:32 · 14 answers · asked by Robert and Annie (nee D) K 1

This is something I have always wondered about. It seems logical to me that nothing should exist. So you would have absolute darkness, absolute cold and absolute silence, because it takes energy for any of that to change. In all of the endless years of unrecorded time, apparantly nothing happened. Then suddenly energy/matter appeared like magic. What changed? Excuse my ignorance of physics but I am not sure physicists really know.

2006-11-25 00:53:25 · 5 answers · asked by william a 6

The change in length of a wire needs to be calculated

2006-11-24 23:06:08 · 4 answers · asked by jack m 1

2006-11-24 22:57:12 · 6 answers · asked by mehdi s 1

2006-11-24 22:54:50 · 10 answers · asked by ganesh 1

2006-11-24 22:46:59 · 5 answers · asked by ganesh 1

2006-11-24 20:37:57 · 16 answers · asked by Manny 1

this is my homework over weekend... i got like 10 of these questions but i need 3 of them really bad... all my friends couldnt seem to solve them...

heres the link to the photobucket

http://i129.photobucket.com/albums/p220/yollajolla/scan005.jpg

http://i129.photobucket.com/albums/p220/yollajolla/scan004.jpg

http://i129.photobucket.com/albums/p220/yollajolla/scan003.jpg

2006-11-24 19:30:53 · 2 answers · asked by yollajolla 1

A steel cable with cross-sectional area 3.00 cm^2 has an elastic limit of 2.40×10^8 Pa.
Find the maximum upward acceleration that can be given an elevator of mass 1300 supported by the cable if the stress is not to exceed one-third of the elastic limit.

2006-11-24 19:17:48 · 3 answers · asked by googoosh g 1

2006-11-24 19:15:20 · 14 answers · asked by mn 1

IN SUN THE TEMPERATURE DOES NOT REACHES 100C. (NEITHER IT BOILS)

2006-11-24 19:10:12 · 16 answers · asked by ana 1

2006-11-24 19:01:39 · 5 answers · asked by sincere12_26 4

...like back in the 1600's?

2006-11-24 19:01:28 · 2 answers · asked by sincere12_26 4

Is only one single atom or electron going at 186000 miles per hour considered as light?

2006-11-24 17:34:22 · 6 answers · asked by A fan 4