In various forms, like when we brush our hair-the hair tends to stand up, when walk with our feet close to the ground n touch somebody we get static, i know that one reason is b/c of the friction we produce energy, but how could this happen, humans aren't an electicrical cords or sockets??
Why does static electiricity occur?
Don't listen to all that physics stuff... It's when two people have a shocking encounter... Like when the stars collide and energy is released,
fasteddie...
Reply:I believe it happens when electrons jump from one atom to the next without sharing the electron. For every proton in an atom this is an electron, however there can be more or less electrons per proton, and that is how things become positivly or negativly charged. If an atom has less electrons than protons the atom is positvely charged, and if it has more it is negatively charged since electrons are negative and protons are positive.
It's when atoms or compounds of opposing electrical charges touch the electron jump, and an electrical spark is created. Materials can be forced to collect or looses too many electons causing matericals with positive and negative charges to exists though energy exerted on the object like from friction.
Reply:All matter contains electrons whhich are negatively charged particles. Normally all matter are neutral. But friction between two objects cause the electrons go from an object to another object which has great affinity for electrons. Hence that object gets negative charge wheras the other gets positive charge.
Reply:God made it that way so we can shock people when we walk across polyester carpet. God's got a great sense of humor.
Reply:Political guy is referring to partial charges. The atoms are not really positive or negatively charged, but they are charged relatively to the object which is in contact with your hair or any other substance which can have static electricity.
Reply:Certain materials like the rubber of your sole readily pick up electrons, thus giving your a charge. When you come into contact with another body the charge attempts to neutralize via an electric current. Other factors like dryness and material properties of the your immediate environment also come into play.
Thursday, July 30, 2009
Electrical applications - electrical circuits - ring and radial (UK)?
for ring and radial please state;
a) the maximum number of sockets allowed for a permitted floor space.
b) the maximum fuse rating, which can be used.
c) minimum conductor size.
d) explain the types of cables that can be used.
e) the maximum number of fuse spurs allowed on a ring main circuit.
Electrical applications - electrical circuits - ring and radial (UK)?
All this information is in the 16th edition. you need to consult it because there are not easy answers to your questions.
a) One ring up to 110 square metres, radial areas are smaller and depend on wire size.
b) Depends on wire size
c) Depends on fuse/breaker size
d) depends on location
e) One spur for each socket on the ring (not sure what you mean fuse spur as this is a type of outlet and you can put as many as you want if they are in the ring)
Reply:In the US, the answers are:
a: No limit.
b: 20 amperes. British practice would probably be less, as 240 volts is used there.
c: 12-gauge for 20 amp fusing; 14-gauge if 15 amps.
d: NM cable with ground is standard in residential construction in the US. In industrial applications, armored cable or metal conduit is required.
e. No limit.
a) the maximum number of sockets allowed for a permitted floor space.
b) the maximum fuse rating, which can be used.
c) minimum conductor size.
d) explain the types of cables that can be used.
e) the maximum number of fuse spurs allowed on a ring main circuit.
Electrical applications - electrical circuits - ring and radial (UK)?
All this information is in the 16th edition. you need to consult it because there are not easy answers to your questions.
a) One ring up to 110 square metres, radial areas are smaller and depend on wire size.
b) Depends on wire size
c) Depends on fuse/breaker size
d) depends on location
e) One spur for each socket on the ring (not sure what you mean fuse spur as this is a type of outlet and you can put as many as you want if they are in the ring)
Reply:In the US, the answers are:
a: No limit.
b: 20 amperes. British practice would probably be less, as 240 volts is used there.
c: 12-gauge for 20 amp fusing; 14-gauge if 15 amps.
d: NM cable with ground is standard in residential construction in the US. In industrial applications, armored cable or metal conduit is required.
e. No limit.
Batch file for telnet?
So... I installed an SMTP program (surgeMail) on my computer so that I can send email using myself as the outgoing server. I plan to prank my friend by sending him a fake email. I understand the whole SMTP protocol and commands and what not, but I'm hoping to find an easier way then typing everything in manually in telnet. I've found that if you make a typo... it's irreversible. Is there a way I can write a batch file or some other sort of script file to make this easier? What about in C#? Is there an easy way to do it that way? I know I could use sockets, but I'm hoping for something a bit easier/user-friendly. Any ideas?
Note: It successfully sends the email when I manually type it in error-free in telnet (telnet localhost 25). I'm trying to remove the possibility of error by having everything pre-typed and programmatically feed the commands to telnet.
Batch file for telnet?
Why don't you just use a mail client, like Outlook Express or Thunderbird and configure it to connect to your local SMTP service? That way you can write the email like normal people do?
Also realize your "prank" email is likely going to be flagged as major spam due to your haphazard setup, and your friend may never see it.
Reply:You dont need telnet. You can use smtp commands in a script. Such as:
echo "To:MyBud@example.com" %26gt; MAIL_TMP
echo "From: NotMe@example.net" %26gt;%26gt; MAIL_TMP
echo "Subject: Ha Ha %26gt;%26gt; MAIL_TMP
cat BodyofMessage.txt %26gt;%26gt; MAIL_TMP
/usr/sbin/sendmail -F "NotMe" -t notme@example.net %26lt; MAIL_TMP
of course the smtp client server you are running has to be told that its ok to send as that domain. The default setups have gotten really picky about such things in order to protect against outside abusers.
flash cards
Note: It successfully sends the email when I manually type it in error-free in telnet (telnet localhost 25). I'm trying to remove the possibility of error by having everything pre-typed and programmatically feed the commands to telnet.
Batch file for telnet?
Why don't you just use a mail client, like Outlook Express or Thunderbird and configure it to connect to your local SMTP service? That way you can write the email like normal people do?
Also realize your "prank" email is likely going to be flagged as major spam due to your haphazard setup, and your friend may never see it.
Reply:You dont need telnet. You can use smtp commands in a script. Such as:
echo "To:MyBud@example.com" %26gt; MAIL_TMP
echo "From: NotMe@example.net" %26gt;%26gt; MAIL_TMP
echo "Subject: Ha Ha %26gt;%26gt; MAIL_TMP
cat BodyofMessage.txt %26gt;%26gt; MAIL_TMP
/usr/sbin/sendmail -F "NotMe" -t notme@example.net %26lt; MAIL_TMP
of course the smtp client server you are running has to be told that its ok to send as that domain. The default setups have gotten really picky about such things in order to protect against outside abusers.
flash cards
How can i design a network monitoring software in windows or Linux?
The software has to be like a client/server model. The server should be able to find out the details of the network activities of the clients connected and authenticate and remove users from the network. I am familiar with C/C++, Java %26amp; Lisp. I really dont know where to begin as this is the first time I have to do something like this. Also how can I use sockets or SNMP to achieve the same? Please help.
I am an engineering student from India and this is our first year mini project.
How can i design a network monitoring software in windows or Linux?
Actually, since Nagios is an open-source project, you can download the source code and see how it works. That should give you a good starting point.
http://sourceforge.net/projects/nagios/
There are several other such programs in the same category:
http://sourceforge.net/softwaremap/trove...
I am sure that in addition to downloading the code, if you were to ask polite questions of the developers, as you have here, they would be very happy to assist you.
Or, better yet, you could offer to work on one of these Open Source projects as your mini project. Check with your professor.
Reply:Try using nagios everyone uses it and it already built for you. besides it also free. No need to reinvent the wheel.
You can find it at nagios.org
I am an engineering student from India and this is our first year mini project.
How can i design a network monitoring software in windows or Linux?
Actually, since Nagios is an open-source project, you can download the source code and see how it works. That should give you a good starting point.
http://sourceforge.net/projects/nagios/
There are several other such programs in the same category:
http://sourceforge.net/softwaremap/trove...
I am sure that in addition to downloading the code, if you were to ask polite questions of the developers, as you have here, they would be very happy to assist you.
Or, better yet, you could offer to work on one of these Open Source projects as your mini project. Check with your professor.
Reply:Try using nagios everyone uses it and it already built for you. besides it also free. No need to reinvent the wheel.
You can find it at nagios.org
Why won't my PC give my new hard disk a drive letter?
I suffered a hard disk failure the other night. :-( I managed to re-animate my operating system from the backup copy I had on the partition, but obviously all my recent files are lost. (I've backed up files previously, but not for the last few weeks). I've put in a second hard drive to recover files from c: to, but the PC won't ascribe a drive letter. I've got a 200GB drive with C: and D: (as the OS backup partition) on a SCSI. There are 2 SCSI ports on my motherboard. I've also got 2 optical drives running as master and slave on one IDE and now I've connected a 320GB drive to the other IDE. I've tried attaching via the master and slave sockets on the IDE and changing the jumpers from factory setting (cable select) to device 1 (slave) and device 1 (slave present). The hardware manager accepts that there is a hard disk drive present, but won't give it a drive letter. It also claims that 'this device is working properly'!
Why won't my PC give my new hard disk a drive letter?
Right click "My Computer" -%26gt; Manage -%26gt; Disk Management. Assign a letter from there.
Reply:you have got to partition the hard drive and then format it, you can do this in disk management on windows XP or Dos or windows 2000,98,95 ect
to do this in Dos download fdisk onto a floppy disk or you can do it from dos itself
C:\windows\Fdisk
Reply:Goto Control Panel - Administrative Tools - Computer Management - Storage - Disk Management
In the bottom pane choose your new hard drive, right-click on the window, and choose 'Change drive letter...' - Change. Now choose a drive letter that will not conflict with your other drives - SCSI or optical. Click OK and you should now be able to see the new drive.
Reply:I would check two things. The first is the BIOS to make sure that it is recognised there, if not you can't use it. If you don't see it in the BIOS, you can get the BIOS to do an automatic search for your your drives. The second thing that I would check is whether the HDD has been formatted or not. From what you are saying, you have done everything that is needed except for the formatting. You will need to format the new disk in the same File System as the old HDD. You can chose a different File System but it makes it far easier if both HDDs are the same, which should be NTFS (New Technonlogy File System) rather than FAT32 as your HDDs are large.
Reply:All this time I've been going to Computer Management via Control Panel! Thanks for the unintended tip TallPaul.
flower girl
Why won't my PC give my new hard disk a drive letter?
Right click "My Computer" -%26gt; Manage -%26gt; Disk Management. Assign a letter from there.
Reply:you have got to partition the hard drive and then format it, you can do this in disk management on windows XP or Dos or windows 2000,98,95 ect
to do this in Dos download fdisk onto a floppy disk or you can do it from dos itself
C:\windows\Fdisk
Reply:Goto Control Panel - Administrative Tools - Computer Management - Storage - Disk Management
In the bottom pane choose your new hard drive, right-click on the window, and choose 'Change drive letter...' - Change. Now choose a drive letter that will not conflict with your other drives - SCSI or optical. Click OK and you should now be able to see the new drive.
Reply:I would check two things. The first is the BIOS to make sure that it is recognised there, if not you can't use it. If you don't see it in the BIOS, you can get the BIOS to do an automatic search for your your drives. The second thing that I would check is whether the HDD has been formatted or not. From what you are saying, you have done everything that is needed except for the formatting. You will need to format the new disk in the same File System as the old HDD. You can chose a different File System but it makes it far easier if both HDDs are the same, which should be NTFS (New Technonlogy File System) rather than FAT32 as your HDDs are large.
Reply:All this time I've been going to Computer Management via Control Panel! Thanks for the unintended tip TallPaul.
flower girl
How to transfer wmv videofile & jpg/bmp/gif pics from DELL INSPIRON laptop Cdrive to TV? Will S-video not do?
How should I transfer .wmv video file %26amp; .jpg / .bmp / .gif photos from my DELL INSPIRON laptop C drive to my PHILIPS TV to see the video recordings and the photos on my TV screen ? Will S-video cable connection not do ?
I have tried without success connecting my laptop to the TV input sockets with an S-Video cable. I have Windows XP SP2 and the manual says merely connecting laptop to the three pin input sockets in TV should do, but it does not. Some friends tell me I should have some kind of PCICM [? I don't understand much] in my laptop as interface.
How to transfer wmv videofile %26amp; jpg/bmp/gif pics from DELL INSPIRON laptop Cdrive to TV? Will S-video not do?
As long as both your TV and Laptop have an S-Video connection then it should work... As long as..
The TV is set to the correct input - And the Laptop is set to the correct output. (Sometimes when you try to output to an external source, you have to tell the l;aptop to use that display ONLY - there will be a function key on the laptop that tells it to do this)
Reply:Write the images and videos to a DVD, buy a DVD player and play the DVD as simple as that.
Reply:You have to press FN + [F5] or look like a laptop/screen key.
Some manufacturer does not enable (powerup) the video display automatically
I have tried without success connecting my laptop to the TV input sockets with an S-Video cable. I have Windows XP SP2 and the manual says merely connecting laptop to the three pin input sockets in TV should do, but it does not. Some friends tell me I should have some kind of PCICM [? I don't understand much] in my laptop as interface.
How to transfer wmv videofile %26amp; jpg/bmp/gif pics from DELL INSPIRON laptop Cdrive to TV? Will S-video not do?
As long as both your TV and Laptop have an S-Video connection then it should work... As long as..
The TV is set to the correct input - And the Laptop is set to the correct output. (Sometimes when you try to output to an external source, you have to tell the l;aptop to use that display ONLY - there will be a function key on the laptop that tells it to do this)
Reply:Write the images and videos to a DVD, buy a DVD player and play the DVD as simple as that.
Reply:You have to press FN + [F5] or look like a laptop/screen key.
Some manufacturer does not enable (powerup) the video display automatically
Cisco questions help!?
Can anyone please answer the following questions there multiple choice, choose 1 unless stated thanks and explain briefly of the answer would greatly appreciate this
7 Which type of drive is installed in a 5.25-inch bay and can be accessed without opening the case?
a)hard drive
b)optical drive
c)floppy drive
d)LS120 drive
8 What is the most reliable way for users to buy the correct RAM to upgrade a computer?
a)Buy RAM that is the same color as the memory sockets on the motherboard.
b)The RAM chip should be the same size than the ROM chip.
c)Ensure that the RAM is compatible with the peripherals installed on the motherboard.
d)Check the motherboard manual or manufacturer's website.
11.A technician is installing a new power supply in a computer. Which type of power connector should be used to connect to a PATA hard drive?
a) Berg
b) mini-Molex
c) Molex
d)20-pin ATX connector
Cisco questions help!?
The answer to the first question is Optical Drive. Floppy and LS 120 drives are 3.5 inches.
The answer to the second question is Check the motherboard manual or manufacturers website. No explanation necessary
The answer to the third question is Molex. Mini Molex connectors are for floppy drives and the 20 pin ATX connector is for the motherboard power. I've never heard of a Berg.
Now you are ready for your A+ test.
7 Which type of drive is installed in a 5.25-inch bay and can be accessed without opening the case?
a)hard drive
b)optical drive
c)floppy drive
d)LS120 drive
8 What is the most reliable way for users to buy the correct RAM to upgrade a computer?
a)Buy RAM that is the same color as the memory sockets on the motherboard.
b)The RAM chip should be the same size than the ROM chip.
c)Ensure that the RAM is compatible with the peripherals installed on the motherboard.
d)Check the motherboard manual or manufacturer's website.
11.A technician is installing a new power supply in a computer. Which type of power connector should be used to connect to a PATA hard drive?
a) Berg
b) mini-Molex
c) Molex
d)20-pin ATX connector
Cisco questions help!?
The answer to the first question is Optical Drive. Floppy and LS 120 drives are 3.5 inches.
The answer to the second question is Check the motherboard manual or manufacturers website. No explanation necessary
The answer to the third question is Molex. Mini Molex connectors are for floppy drives and the 20 pin ATX connector is for the motherboard power. I've never heard of a Berg.
Now you are ready for your A+ test.
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