## Posted tagged ‘end’

August 24, 2011

### Problem: you have 100 doors in a row that are all initially closed. you make 100 passes by the doors starting with the first door every time. the first time through you visit every door and toggle the door (if the door is closed, you open it, if its open, you close it). the second time you only visit every 2nd door (door #2, #4, #6). the third time, every 3rd door (door #3, #6, #9), etc, until you only visit the 100th door.

question: what state are the doors in after the last pass? which are open which are closed?

### Solution

For example, after the first pass every door is open. on the second pass you only visit the even doors (2,4,6,8…) so now the even doors are closed and the odd ones are opened. the third time through you will close door 3 (opened from the first pass), open door 6 (closed from the second pass), etc..

question: what state are the doors in after the last pass? which are open which are closed?

solution: you can figure out that for any given door, say door #42, you will visit it for every divisor it has. so 42 has 1 & 42, 2 & 21, 3 & 14, 6 & 7. so on pass 1 i will open the door, pass 2 i will close it, pass 3 open, pass 6 close, pass 7 open, pass 14 close, pass 21 open, pass 42 close. for every pair of divisors the door will just end up back in its initial state. so you might think that every door will end up closed? well what about door #9. 9 has the divisors 1 & 9, 3 & 3. but 3 is repeated because 9 is a perfect square, so you will only visit door #9, on pass 1, 3, and 9… leaving it open at the end. only perfect square doors will be open at the end.

### Emotional Asphyxiation And The Small Town Syndrome………!

August 23, 2011

It all started when i rushed towards her like a fly rushes towards a lamp..!

When i used to smoke my memory hush suddenly i happened to feel her intrusion..!
I never really knew den dis may have little importance in my experiment torn life.!
To much of experimenting with my life caused a severe disorderliness..!
Of course this disorderliness is not uncommon for me….
the happened like this…!!
Every time i felt like giving up writing these insane writings some body will just intrude and raises hopes of making it till the end…!!
When this girl came like an unexpected summer rain…
I welcomed it….
don’t know the reason but somehow my Detective ridden brain sensed foul play…!!
I found her reason rather accepting…!!
Morphed….
These were the feelins before few months…
And i came to accept The existence whole heartedly…!!
Everytime i think about someone i start my thinkin from my purposely wasted shoool daz..
When i used to be an introvert and every one used to call me a good boy and i was very much susceptible to the so called false emotions…
Well, That’s not the matter i really think about…
But it gives me some base for Lateral, philosophical thinking..!

### PLASTIC-2

August 23, 2011

What are Plastics?

Plastics are a material that is made up mainly of macromolecules, that can be made fluid by the action of heating and pressurizing, and that can be processed into end products with any useful shape you want to make.

Classification of Plastics

Plastics can be classified into:

1. Thermoplastics and Thermo sets
2. Amorphous Thermoplastics and Crystalline Thermoplastics
3. Commodity Plastics and Engineering Plastics

Thermoplastics Vs Thermo sets

Thermoplastics Elastomer

• TPE – thermoplastic elastomer
• Resemble rubber at room temperature
• Can be melt-processed like other thermoplastics
• Become elastic like rubber when cooled

Amorphous Thermoplastics Vs. Crystalline Thermoplastics

Thermo sets Classifications

Commodity Plastics Vs Engineering Plastics

### PLASTIC-2

August 23, 2011

What are Plastics?

Plastics are a material that is made up mainly of macromolecules, that can be made fluid by the action of heating and pressurizing, and that can be processed into end products with any useful shape you want to make.

Classification of Plastics

Plastics can be classified into:

1. Thermoplastics and Thermo sets
2. Amorphous Thermoplastics and Crystalline Thermoplastics
3. Commodity Plastics and Engineering Plastics

Thermoplastics Vs Thermo sets

Thermoplastics Elastomer

• TPE – thermoplastic elastomer
• Resemble rubber at room temperature
• Can be melt-processed like other thermoplastics
• Become elastic like rubber when cooled

Amorphous Thermoplastics Vs. Crystalline Thermoplastics

Thermo sets Classifications

Commodity Plastics Vs Engineering Plastics