Physics - December 2006

Whenever I'm in a plane, it baffles me how a crash can claim all the passengers on board in the event of a crash. I'm talking about the commerical jets. I know planes travel at fast fast speeds, but what actually kills the person first on impact? Surely not all planes are crushed like a tin can... therefore, many times certain areas of the plane are still intact. If any of you are experts in physics, or have any other knowledge... I'd like to know why most people don't usually survive plane crashes.

For example, September 11th: What do you think killed the people when it crashed into the World Trade Center? The impact of the plane alone when it crashed into the building, or the fire?

2006-12-21 18:47:15 · 11 answers · asked by isaidmaybebaby 1

2006-12-21 17:25:50 · 14 answers · asked by Chase 4

My AP Physics class and I watched a three-part mini-series over string theory over the past few days and I was wondering what other people thought about it.

2006-12-21 16:37:31 · 5 answers · asked by Anonymous

I don't understand what physical property of circuitry would cause a car stereo system or iPod to not work correctly.

2006-12-21 16:31:29 · 7 answers · asked by Mike 3

I've noticed that solar batteries are always broken up into little sections. Does each section as an individual voltaic cell - and then all of them are connected to series/parrallel?
I know that the frequancy of light affects voltage, and amplitude of light effects amperage. So with that reasoning, i figured that the size of the solar cell won't affect voltage, but would only affect amperage. So the question is this: if i take a square foot of solar cells, but make each cell really small, like a eighth of an inch square, and connect it all in serious, would i be able to make a solar cell that would output 100's of volts or electricity, but have low amperage output?

2006-12-21 15:24:22 · 2 answers · asked by carrotstien 2

2006-12-21 15:18:11 · 6 answers · asked by narenkolla 1

2006-12-21 15:18:10 · 8 answers · asked by bozo 4

i understand Einsteins theory of relativity, how its impossible to travel faster than light because the energy used is leading up to infinity, but why is it that 2 objects traveling towards each other at the speed of light only pass at the speed of light rather than twice the speed of light?

2006-12-21 14:40:07 · 22 answers · asked by Anonymous

I have an exam tomorrow and my professor is going to state a problem about the conservation laws... i have in mind about momentum and stuff. Can anyone of you name some major ones? I would appreciate it. Best answer gets full credit.

2006-12-21 14:36:32 · 3 answers · asked by Sir Guitarist 2

2006-12-21 14:11:11 · 3 answers · asked by sakura_jin237 2

i have heard before that if you rubed your feet agains a rug and then you touch another object or person it would feel like a little shock for them i dont remember if it was static friction or another type of friction. but i would like to know how to do that???? any websites??????? thanx!!!!

2006-12-21 13:59:22 · 3 answers · asked by soccerdude 2

I have a theory on gravity and defying it.

2006-12-21 13:41:58 · 8 answers · asked by bricyns 1

2006-12-21 13:40:15 · 8 answers · asked by tangfk 1

The room is is square with no openings and the mirrored surface is a perfect reflective surface. I would turn on the light and then turn it off. Would the beam keep reflecting from surface to surface? And if not, what would happen to it?

2006-12-21 13:38:10 · 6 answers · asked by cal w 1

I was told by a friend that water is held together via positive and negative magnetism... Sought of like a north and south pole Idea. Perhaps someone could clarify this for me.. Thank You..

2006-12-21 13:31:24 · 9 answers · asked by LipSync 1

A golf ball is hit at ground level. The ball is
observed to reach its maximum height above
ground level 8:6 s after being hit. 1.2 s after
reaching this maximum height, the ball is
observed to barely clear a fence that is 413 ft
from where it was hit.
The acceleration of gravity is 32 ft/s2 :
How high is the fence? Answer in units of
ft.

2006-12-21 12:45:06 · 3 answers · asked by kavita 1

I have argued with someone and he insisted on choosing Newton,,,he said Newton IQ is higher than Einstien... what you guys think?

2006-12-21 12:34:38 · 11 answers · asked by Calgarian_man 2

A horizontal string of length 1.5 meters vibrates with a wave velocity of 1320 m/s at its fundamental frequency.
a)what is the fundamental frequency?
b)What is the frequency of the fourth overtone, and how many nodes and antinodes will it have?
c)In terms of interference, to what do the nodes and antinodes correspond?
d)How many grams must the string be to have a tension of 10^5N?

absent all week,and I am so lost,pleaseeeee help it will be GREATLY appreciated!

2006-12-21 12:29:10 · 1 answers · asked by Kelly 1

why is it physicly imposible for reindeer to fly: why does it go against thje laws of physics

2006-12-21 12:27:57 · 9 answers · asked by Valerie 3

If a bat chirps at a frequency of 60000 Hz, and the speed of those waves are v=330 m/s, and the bat can detect insects 1 wavelength long, what is the smallest insect that it can detect in wavelengths?

2006-12-21 12:12:26 · 4 answers · asked by graycl0ud 1

2006-12-21 11:43:37 · 8 answers · asked by velcro1dog 1

2006-12-21 11:33:24 · 3 answers · asked by Anonymous

Having an egg in your hand, how can you tell in seconds whether it is raw or hard-boiled, of course without breaking it!
(You also have a table)
Explain the physics behind if you know.

2006-12-21 11:23:39 · 29 answers · asked by Farshad 2

why is it? over like iron,brass,steel etc.

2006-12-21 11:15:17 · 8 answers · asked by sek19 2

it is a spinner game. here are the rules:(1) you take turns spinning the spinner. (2)if it lands on the white region, you get a point.(3)if it lands on the gray region, the other player gets a point. (4) the first person to get 20 points wins. do you think that the game is fair?
i don't think it is fair because if the first person lands on white all the time, then they can get 20 points first. so the first person gets an advantage. the second player has a 50/50 chance of getting into the gray area or the white area. the first person has a 50/50 chance of landing on the gray area or white area.BUT,the first person can get 20 points first. what do you think? the white and the gray areas are both half of the board.

2006-12-21 11:05:55 · 10 answers · asked by Anonymous

moon around planet b, which of the following is true?1)planet A is mostly composed of gas 2)planet B is larger than planet A 3)the moon around planet B is hollow 4)planet B has a thicker atmosphere than planet A 5)the mass of planet A ia grater than the mass of planet B

2006-12-21 10:46:40 · 2 answers · asked by bobbie jo e 1

1)each level of the food chain depends on the level below 2)energy travels in both directions in a food chain 3)the food web shows many interrelated food chains 4)consumers often compete for the same food source 5)most consumers eat a variety of foods

2006-12-21 10:33:57 · 11 answers · asked by bobbie jo e 1

Who had the highest I.Q?

2006-12-21 10:15:19 · 20 answers · asked by Anonymous

When you add infinity to infinity, why doesn't it get more than infinity? Ok, and black holes are real?! How do they work? And how many demensions are there? Does time count as one?

2006-12-21 09:36:41 · 2 answers · asked by Kia 2

Everyone seems to think that traveling back in time can't happen.
Why is that? Also, how would you prove it impossible?

2006-12-21 09:06:53 · 25 answers · asked by canofpineapples 1