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Inter physics A motor vechicle travelled the first third of a distance s at speed of v1=10kmph,the second third at a speed of v2=20kmph and the last third at a speed of v3=60kmph.Determine the mean speed of the vechicle over the centire distance s.

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  • K L'Heureux May 11, 2010

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Mean speed= (v1*s+v2*s+v3*s)/(3*s)
therefore mean speed=30kmph

Posted on Jun 06, 2008

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It should be about 40-50kmph that is the ballpark figure. (and a reasonable answer)

Posted on Jun 03, 2008

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What is causing igi starting error?


There are so many reasons why the fatal exception error has occurred. First, your video card maybe has below specs and need to upgrade. Second, maybe you didn't install a direct x in your computer that's why games didn't run successfully. Last, some files are corrupt so the game will not run properly. Solutions:
First, upgrade your video card to a higher spec.
Second, try to install a direct x in your computer. This is the link to download DirectX
Third, try to uninstall the game and reinstall it again.

Aug 17, 2011 | Operating Systems

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How to divide bandwidth in squid


What is Bandwidth throttling :

Consider we are having 512Kbps Internet connection line. And the system administrator wants to divide the whole bandwidth into two sections. Read More One for the normal users and the other for special users who need high speed internet connection. So that all the normal users can use 256 Kbps and the special users can use the remaining 256 Kbps. So in this case you have to make a bandwidth throttling to differentiate the whole single pipe line into two sections. This can be achieved using squid proxy server.

Squid main configuration file ----- /etc/squid/squid.conf
Squid log file ----- /var/log/squid/access.log
Cache log file ----- /var/log/squid/cache.log

Bandwidth throttling in squid is done using Delay Pools. Delay pools uses bucketing system.

Throttle Calculations
512Kbps(Kilo bits per second) -----> 64Kbytes -----> 64000bytes
256Kbps -----> 32Kbytes -----> 32000bytes
128Kbps -----> 16Kbytes -----> 16000bytes
64Kbps -----> 8Kbytes -----> 8000bytes

Points to remember in Delay Pools:
There are basically three things to note, they are - delay pools, delay class, delay parameters.

Delay pool --- Defines how many pools we want to use
Delay Class ---- Defines type of the pool you are going to use.
Delay Parameter � allots the restrictions and fill rate/maximum bucket size.

As I have said previously in this documentation delay pools uses bucketing system.
Now there are three types of buckets

Class 1 pool: A single aggregate bucket, shared by all users
Class 2 pool: One aggregate bucket, 256 individual buckets
Class 3 pool: One aggregate bucket, 256 network buckets, 65,536 individual buckets

If you still have any problem in the above syntax (ie) aggregate, network and individual buckets to understand, then here is a simple syntax/example for all these

For Class 1 delay pool
delay_parameters 1 32000/32000

For Class 2 delay pool
delay_parameters 1 48000/48000 48000/48000

For Class 3 delay pool
delay_parameters 2 32000/32000 8000/8000 16384/16384

Example Setup:
One 512Kbps pipe line. We want to distribute the whole pipe line into 2. One for normal users and other for special users as follows
Normal users --- 128 Kbps
Special Users --- 384 Kbps

Configuration Setup File /etc/squid/squid.conf:
Before getting into the delay pools setup first create the acl(Access Control List). Through acl you can define rules according to your requirements. Find the Access Control section in the squid.conf file.
Here is an example:

acl superusers src 192.168.1.1 192.168.1.2 192.168.1.3
acl mynetwork src 192.168.1.0/255.255.255.0

Here in the above example only three users are special users who need 256Kbps bandwidth which are listed in the specialusers label and the whole network including he special users are labeled as mynetwork.

After creating the users you have to allow them to access the internet. Below line specifies for allowing the mentioned labeled users.

http_access allow superusers
http_access allow mynetwork

Now comes the funny part Delay Pools. Here We will deal with a basic example for delay pools.

The example is as follows: We are having 512Kbps pipe line connection. We want to divide it into segments one for the special users, web servers and the other for the normal users in the organization. The special users and the web servers are given 384Kbps speed and the remaining 128Kbps for the normal users.

Delay Pools for super users:
Check for the delay pools section in the squid.conf file.
Start the configuration for delay pools as follows
==================================
########## Delay Pools############
==================================

delay_pools 2

As described above we have to create 2 delay pools, one for each delay class.
====================================================
######### Defining Delay pool 1 in class 2 #########
====================================================

delay_class 1 2
delay_parameters 1 48000/48000 48000/48000
delay_access 1 allow superusers

The first line specifies Delay Class which defines delay pool 1 for the delay class 2.

Why we are using delay class 2 here?

The first part on the second line ie �1� defines the pool One(1)

The second part on second line defines the aggregate 48000/48000(restore/max). where restore is the number of bytes (not bits - modem and network speeds are usually quoted in bits) per second placed into the bucket, and maximum is the maximum number of bytes which can be in the bucket at any time.

The third part on second line is individual buckets again 48000/48000(restore/max). All the special users and the web servers should obtain the same speed of 384 Kbps.

The third line allows the super users to fall in that bucket.

=====================================================
######### Defining Delay pool 2 in class 3 #########
=====================================================

Delay Pools for normal users:

delay_class 2 3
delay_parameters 2 32000/32000 8000/8000 16384/16384
delay_access 2 allow !superusers

The first line specifies Delay Class which defines delay pool 2 for the delay class 3.

The first part on the second line ie �2� defines the pool Two(2) of class three(3)

The second part on second line defines the aggregate 32000/32000(restore/max) as aggregate (ie for whole).
Note : - If you use -1/-1. �-1� indicates �unlimited�.

The third part on second line is network bucket. We have defined here 8000/8000 .

The fourth part on second line is for individual.

The third line specifies to throttle all the users except the super users.

How to check:
First set proxy settings in your browser as follows:
Go to any client machine and open an IE(Internet Explorer). Select "Tools" menu then select "Internet Options" then select "Connections" tab. After that select the "LAN Settings" button, you will get a new pop-up window there you select "Use proxy server for your LAN" check box and finally give your squid proxy servers ip address and the port on which the squid proxy server is configured. Now press "OK" and again press "OK". Cloase the window and now open a new window.
Second Check by downloading any large file

Start to download any lage file not less than 10MB size. Because when ever you download any small file it used to download it quickly. When you start downloading large file at first if you note some starting bytes of the file gets downloaded quickly and later it gets slowed down.

Keep a note on the download pop-up box which shows the speed limits in "kbps". When we start downloading note on the pop-up box the speed limits in kbps shows high value and then slowly gets decreased. This means when you start downloading the bucket gets filled and slowly it decreases and becomes stable to the specified limit in Kbps according to the configuration. Remember again as i told restore value is used to set the download speed, and the max value lets you set the size at which the files are to be slowed down from.

on Apr 24, 2010 | fedora Linux Operating System

1 Answer

When i connect my 3g card is not instoling its self to the pc so that i will be able to conect to the inter net but the light on the 3g card is on to show that the 3g card is connected


If you are not able to connect with Internet while you have connect the 3G data card there is mainly some reasons as follows :-


1. 3G data card must insert in high speed USB slot [the front USB slot may be not good]


2. The recharge for GPRS or 3G in Nil.


3. The software for the Data card is not properly installed.


4. Connection Profile is not defined.


5. Last reason is Generic Host win 32 problem. {Use GHremover}


Good Luck !


* I am using MicroMax 3G data card. In starting I also face some problem, but now it is working fine.

Mar 17, 2011 | Operating Systems

1 Answer

Santa with his son Banta were traveling on a boat after traveling one mile from the starting point the hat of Santa fell down. After 5 minutes Banta told his father about the hat. Santa turned the boat and...


At time 'ZERO', the hat was at distance 'ZERO' from the starting-point.
At time 'T', the hat was at distance 'ONE MILE' from the starting point.
The speed of the boat was the MAXIMUM speed of the boat, MINUS the speed of the current.
At time 'T+5', the hat was being carried by the stream-current toward distance 'ZERO'.
At time 'T+10', the hat was at distance 'ZERO', and the boat was at distance 'ZERO'.
The speed of the boat for the most-recent '10' minutes was the MAXIMUM speed, PLUS the speed of the current.

So, calculate the distance travelled at the 'T+5' time:
DISTANCE = VELOCITY1 multiplied by TIME1.
DISTANCE = VELOCITY2 multiplied by TIME2.

where 'VELOCITY1' is the speed travelling AGAINST the current,
and 'VELOCITY2' is the speed travelling WITH the current.

Finish this "homework" assignment on your own.


Jan 27, 2011 | Operating Systems

1 Answer

What is the specification of windows Xp?


Windows XP Professional System Requirements Published: August 24, 2001 Here's What You Need to Use Windows XP Professional • PC with 300 megahertz or higher processor clock speed recommended; 233 MHz minimum required (single or dual processor system);* Intel Pentium/Celeron family, or AMD K6/Athlon/Duron family, or compatible processor recommended
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• 1.5 gigabytes (GB) of available hard disk space*
• Super VGA (800 x 600) or higher-resolution video adapter and monitor
• CD-ROM or DVD drive
• Keyboard and Microsoft Mouse or compatible pointing device
arrow_px_up.gifTop of page Additional Items or Services Required to Use Certain Windows XP Features • For Internet access:
• Some Internet functionality may require Internet access, a Microsoft .NET Passport account, and payment of a separate fee to a service provider; local and/or long-distance telephone toll charges may apply
• 14.4 kilobits per second (Kbps) or higher-speed modem
For networking:
• Network adapter appropriate for the type of local-area, wide-area, wireless, or home network you wish to connect to, and access to an appropriate network infrastructure; access to third-party networks may require additional charges
For instant messaging, voice and videoconferencing, and application sharing, both parties need:
• Microsoft .NET Passport account and Internet access or Microsoft Exchange 2000 Server instant messaging account and network access (some configurations may require download of additional components)
For voice and videoconferencing, both parties also need:
• 33.6 Kbps or higher-speed modem, or a network connection
• Microphone and sound card with speakers or headset
For videoconferencing, both parties also need:
• Video conferencing camera
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• 33.6 Kbps or higher-speed modem, or a network connection
• Windows XP
For remote assistance:
• Both parties must be running Windows XP and be connected by a network
For remote desktop:
• A Windows 95 or later-based computer, and the two machines must be connected by a network
For sound:
• Sound card and speakers or headphones
For DVD video playback:
• DVD drive and DVD decoder card or DVD decoder software
• 8 MB of video RAM
For Windows Movie Maker:
• Video capture feature requires appropriate digital or analog video capture device
• 400 MHz or higher processor for digital video camera capture

Oct 11, 2010 | Microsoft Windows XP Professional

2 Answers

A rock climber throws a small first aid kit to another climber who is higher up the mountain. The initial velocity of the kit is 18 m/s at an angle of 74° above the horizontal. At the instant when the...


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Sep 18, 2009 | NorStar Operational Software Category E...

2 Answers

For the code snippet output of this if code produce if aNumber 3


There is a bug in this code. The correct code is:-


if (aNumber >= 0)
if (aNumber == 0)
System.out.println(''first string'');
else
System.out.println(''second string'');
else
System.out.println(''third string'');

Mar 21, 2009 | Operating Systems

1 Answer

I am unable 2 play need for speed mostwanted game


UPDATE YOUR DIRECT X FROM INTER NET AND THEN TRY TO PLAY
I HOPE YOU WILL PLAY IT

Dec 16, 2008 | Microsoft Windows Vista Ultimate Edition

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