PLANET how

how air bag works in car?

Although we don't usually associate automobiles with chemistry, a lot of chemistry takes place in a working car--the burning of gasoline to run the engine, for example, and chemical reactions in the battery to generate electricity. Another reaction--one that most drivers would just as soon not experience firsthand--involves the air bag. Air bags are not inflated from some compressed gas source but rather from the products of a chemical reaction. The chemical at the heart of the air bag reaction is called sodium azide, or NaN₃.Under normal circumstances, this molecule is quite stable. If heated, though, it will fall apart. The chemical equation 2 NaN₃ --> 2 Na + 3 N₂ describes exactly how it falls apart. Notice that the second product of the above reaction is N₂, also known as nitrogen gas. A handful (130 grams) of sodium azide will produce 67 liters of nitrogen gas--which is enough to inflate a normal air bag.

0.03 SECOND is all it takes to inflate an air bag.

That's not the only chemistry involved. Notice that the other chemical into which sodium azide falls apart is Na, or sodium. Sodium is a very reactive metal that will react rapidly with water to form sodium hydroxide; as a result, it would be quite harmful if it got into your eyes, nose or mouth. So to minimize the danger of exposure, air bag manufacturers mix the sodium azide with other chemicals that will react with the sodium and, in turn, make less toxic compounds.

What prompts an air bag to inflate by way of this reaction? There are sensors in the front of the automobile that detect a collision. These sensors send an electric signal to the canister

that contains the sodium azide and the electric signal detonates a small amount of an igniter compound. The heat from this ignition starts the decomposition of the sodium azide and the generation of nitrogen gas to fill the air bag. What is particularly amazing is that from the time the sensor detects the collision to the time the air bag is fully inflated is only 30 milliseconds, or 0.03 second. Some 50 milliseconds after an accident, the car's occupant hits the air bag and its deflation absorbs the forward-moving energy of the occupant.
Thank you for Reading

How to Increase Alexa Traffic Rank With Alexaboostup.com

Hi, here i am sharing a trick to increase your site/blog page views easily with that you can improve alexa ranking for that you click below link and register with Alexaboostup and enable auto surf mode
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you can set up no. of page views per day by log in daily

click the link to increase traffic Alexaboostup.com
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Do you know Google Gravity

Hi, here for fun i am posting on interesting thing about google

to see the magic click below
Google Gravity
after clicking just enter something and click enter
This trick works Fairly On chrome and Torch browser
thank you for reading

How plastic bottles are made?

The manufacture of plastic bottlestakes place in stages. Typically, the plastic bottles used to hold potable water and other drinks are made from polyethylene terephthalate (PET), because the material is both strong and light. To understand the manufacturing process it’s helpful to first examine the composition of PET and how this affects plastic bottles.

The first stage in bottle manufacturing is stretch blow molding. The PET is heated and placed in a mold, where it assumes the shape of a long, thin tube. (The process by which the plastic is forced into the mold is called injection molding.)The tube of PET, now called a parison, is then transferred into a second, bottle-shaped mold. A thin steel rod, called a mandrel, is slid inside the parison where it fills the parison with highly pressurized air, and

stretch blow molding begins: as a result of the pressurized air, heat and pressure, the parison is blown and stretched into the mold, assuming a bottle shape. To ensure that the bottom of the bottle retains a consistently flat shape, a separate component of plastic is simultaneously joined to the bottle during blow molding.

The mold must be cooled relatively quickly, so that that the newly formed component is set properly. There are several cooling methods, both direct and indirect, that can effectively cool the mold and the plastic. Water can be coursed through pipes surrounding the mold, which indirectly cools the mold and plastic. Direct methods include using pressurized air or carbon dioxide directly on the mold and plastic.

Once the bottle has cooled and set, it is ready to be removed from the mold. If a continuous molding process has been used, the bottles will need to be separated by trimming the plastic in between them. If a non-continuous process has been used, sometimes excess plastic can seep through the mold during manufacturing and will require trimming. After removing the bottle from the mold and removing excess plastic, the bottles are ready for transportation.

How resistors will work?

Resistors are one type of different materiel which is oppose the flow of charge hence flow of current also will be stopped this is working of resistor

What is Resistance?

The definition of resistance is based upon the Ohm’s law given by the German physicist Georg Simon Ohm.

The Ohm’s Law states that the voltage [V] across a resistor is directly proportional to the current [I] flowing through it. Here, its resistance [R] is the constant of proportionality.

Therefore, V = I * R

Unit of resistance

The SI-unit of resistance is Ohm [Ω].

symbol :

How to detect a VIRUS in PC using cmd ?

This is old but gold for people who don't have much RAM to install an antivirus on their PC..
So here Am gonna tell you how to detect and delete a virus which has infested your PC..

Do the following steps..:-
->Press win+R to open RUN dialog box
->type CMD to open Command Prompt
A black screen like this will open up

Now, Microsoft Command Prompt "attrib" is a very useful tool to check if your hard drives even your flashdisks have been infected by a virus.

You will know if a Malware is inside your hard drive just by looking at the attributes of each files and the file that has the attributes of +s +h +r

The function of attrib is to set and remove file attributes (+r = read-only, archive, +s = system and +h = hidden).

To use attrib

1. Go to the root directory first by typing cd\(because this is always the target of Malware / Virus)
2. Type attrib and press Enter key

In this example, I have two files that are considered as malware.

Note that there are two files which I outlined in red (SilentSoftech.exe and autorun.inf). Since you cannot see this file nor delete it (because the attributes that was set on these files are +s +h +r and I have already mentioned what the stand for

Now we need to set the attributes of autorun.inf to -s -h -r (so that we can manually delete it)

1. Type attrib -s -h -r autorun.inf ( be sure to include -s -h -r because you cannot change the attributes using only -s or -h or -r alone)
2. Type attrib again to check if your changes have been commited
3. If the autorun.inf file has no more attributes, you can now delete it by typing del autorun.inf
4. Since SilentSoftech.exe is a malware you can remove its attributes by doing step 1 and step 3(just change the filename) ex. attrib -s -h -r silentsoftech.exe)

There you have it!!!!

NOTE : when autorun.inf keeps coming back even if you already deleted it, be sure to check your Task Manager by pressing CTRL + ALT + DELETE ( a virus is still running as a process thats why you cannot delete it. KILL the process first by
selecting it and clicking End Process.

Don't Forget about Symbian

This article is about the oldest king of mobile operating systems that is symbian os so many people don't know about all features of symbian here i am gathered some information because i love symbian till now
Symbian has had a native graphics toolkit since its inception, known as AVKON (formerly known as Series 60). S60 was designed to be manipulated by a keyboard-like interface metaphor, such as the ~15-key augmented telephone keypad, or the mini-QWERTY keyboards. AVKON-based software is binary-compatible with Symbian versions up to and including Symbian^3.

Symbian^3 and earlier have a built-in WebKit based browser. Symbian was the first mobile platform to make use of WebKit (in June 2005). Some older Symbian models have Opera Mobile as their default browser.

Nokia released a new browser with the release of Symbian Anna with improved speed and an improved user interface

As Symbian OS is written in C++ using Symbian Software's coding standards, it is possible to develop using Symbian C++, although it is not a standard implementation. Before the release of the Qt SDK, this was the standard development environment. There were multiple platforms based on Symbian OS that provided software development kit (SDKs) for application developers wishing to target Symbian OS devices, the main ones being UIQ and S60. Individual phone products, or families, often had SDKs or SDK extensions downloadable from the maker's website too.

this is the most secure mobile os after latest ios 7

Best Android Games

Hi, Here i am providing some good and most using games

1.Sub way Surfers
2.Hill Climbing
3.Temple Run OZ
4.Fast Racing
5.Die to earn
6.stick cricket
here which i mentioned that are very less in size and more effective and famous games