Why heat sinks are black anodized?
Radiative heat transfer (heat transfer by electromagnetic radiation) is proportional to
e*(T1^4 - T2^4)
where T1 is the absolute temperature of the material, T2 is the absolute temperature of the surroundings, and e is the emissivity coefficient.
A black material has a high emissivity coefficient, while a silvery material has a low emissivity coefficient.
However, the emissivity coefficient cuts both ways, so to speak. A black material in thermodynamic equilibrium with its environment absorbs more radiation, true. But it also emits more radiation (this is necessary for equilibrium to hold). Likewise, a silvery material absorbs less radiation, and also emits less radiation.
Conductive heat transfer ensures that the black material on the surface of the heat sink remains hot. The surroundings are at a lower temperature. Therefore T1 and T2 are set, and the heat transferred from the heat sink to the surroundings is simply proportional to e, the emissivity coefficient.
What is the purpose of agp slot?
An AGP slot is a post-PCI/pre-PCIx graphic card interface bus. It was a step up from the PCI video cards, but were phased out with the PCIx standard.
What are Levels of RAID 0 1 5 and Which one is better and why?
RAID 0 is the best for speed because it uses "data stripping". That means if one drive fails, all you have left on the other one is useless bits and pieces of your files. That means one drive failing will corrupt ALL your data. If you choose RAID 0, you MUST back up your data at the very least every day. Preferably every hour. Automatic back ups is a good idea anyway. RAID 1 uses "mirroring". When you save a file, it gets saved to BOTH drives. Putting drives in RAID 1 does not make the system faster. That means if one drive fails, the other one will still contain all your data. The problem with RAID 1 is that you only get HALF of the space you bought. For example, if you put 2 drives with a 3TB capacity in RAID 0, you would have 6TB. 2 drives with 3TB each in RAID 1 would mean instead of 6TB, you would only have 3TB. The reason for that is because both drives contain the EXACT same data. RAID 5 is pretty good for speed and if 1 drive fails, you can just replace it and rebuild the RAID 5 array without losing any data. RAID 5:
RAID 1: RAID 0: I would create a RAID 0 array to store your files and if you care about any of the files you would store on your computer, a RAID 1 or RAID 5 array (I would recommend RAID 5) to back up your data to. I hope this helps.
Where are the answers for chapter 7 reviewing the basics of the comptia a plus guide to hardware?
in the book
What is the average power consumption of desktop computer?
It depends on what PC, but your power supply will normally say on the side of it. Most commonly is between 200-400 watts Power consumption is a combination of several things. The power listed on your power supply is the amount the power supply is capable of handling. The actual power consumption of the computer depends on what processes are being used, for example word processing will consume less power than heavy gaming. However, one can expect average computer use to consume 150-200W.
What is function of the notch on a integrated circuit?
Notches on integrated circuit chips - and circuit boards - serve various purposes:
Example:
200-pin memory modules cannot be installed into 204-pin memory sockets because a notch would physically prevent it from being plugged in.
Where was Cross Horlock Hardware in Visalia CA?
Two doors west of the old Bank of America Building on Main Street.
What is a ripple in cheerleading?
A ripple in cheerleading is when the cheerleaders do the same moves on different counts. like a wave.
How can you determine the parts configuration of a computer?
Typically the BIOS shows how much memory you have, how fast the CPU is, and how large the hard drives are.
Occassionally, for some computers, a list of detected devices is shown during bootup.
In Windows, you can use built-in features like System Properties, Device Manager, or MSInfo32 to list even more details.
Is there a difference between USB type b female connectors for USB 1 USB 1.1 and USB 2?
No, there is no difference in b type female connectors for usb 1 or 1.1 or 2
PCI slot and 32-bit is 2 deffrent things PCI slot is able to have more extra stuff in ur computer like Graphics card to emprove gamming exp and 32-bit is ur computer Operating System like Windows 7 there r 2 deffrent windows 7, 32 and 64 bit for example the 32 bit is limited on RAM now days if u have more then 3GB RAM u wont be able to run no more then 3GB.... 64-bit is better and faster able to run more up to date Hardware like havin 16GB or more RAM or what ever u please to have in ur computer
A keyboard.
What is the difference between the output ofintegratorand input of a differentiator?
A; An integrator will integrate or slowly change as a rapid input is applied. Differentiate will have just the opposite effect
maximum data size in the Ethernet is 1500 bytes
The data must split between two frames
first frame must carry the maximum number of bytes 1500
second frame needs to carry only 10 bytes
so:
Data size for the first frame: 1500 bytes
Data size for the second frame: 46 bytes with padding
Answer in Arabic
حجم البيانات القصوى في Ethernet القياسي هو 1500 بايت. البيانات من 1510 بايت، لذلك،
يجب حدوث تقسيم بين إطارين. المعيار يفرض أن الإطار الأول يجب أن تحمل أقصى
عدد ممكن من البايت اي (1500). الإطار الثاني بعد ذلك يحتاج فقط لنقل 10 بايت من البيانات؛
ومع ذلك فهو يتطلب حشوة لتصل إلى 46 بايت. وفيما يلي تفصيل يبين:
حجم البيانات لالإطار الأول: 1500 بايت.
حجم البيانات لالإطار الثاني: 46 بايت مع الحشو.
Muatazz Falih.
Basrah.
3 types of devices in computer?
If you are referring to parts within a computer then, every computer needs a motherboard, processor, memory (RAM), and a video card. You will also need a storage device for the Operating System (floppy, CD, Hard Drive, etc.) You will also need a HID, or Human interface Device (mouse, keyboard, touch screen, etc).
How do you find out if your computer is 32 bit or 64 bit in Windows 7?
To find out if you are running 32 bit or 64 bit you will need to press the Start Orb, go to Computer and press View System Information. It will tell you what version you are running there.