| Q. | What is the period of spin of a compact disc with a frequency of 1800 revolutions per minute? | Related Search:
Physics | | | Marianne puts her favorite Backstreet Boys disk in her CD player. If it spins with a frequency of 1800 revolutions per minute, what is the period of spin of the compact disc?
| | A. | T=1/f
f=1800 rpm = 30 revs per second
so T=1/30 s or one-thirtieth of a second | | | |
| Q. | How to calculate the number of bits on a compact disc? | Related Search:
Engineering | | | Can anyone help me with this...
A compact disk has a resolution of 16 bits and a sampling frequency of 40 kHz. If the recording lasts for 30 minutes, how many bits dose the disc contain?
Thanks a million to anyone who can help me.
| | A. | 1.152 gigabits | | | |
| Q. | How do I transfer files to compact disc? | Related Search:
Other - Computers | | | I've gotten a lot of picture files and folders in my computer, and they're taking up a lot of memory, too much to store on the internet, I want to put them on a compact disc. I tried drag and drop, like I would with USB, it didn't work. How would I be able to transfer my picture files to disc? I got the correct disc and everything, I just want to store my photos on my disc. Any idea on how to do that?
What would I use in the first place to do the transfers? Thanks in advance.
| | A. | Drag and drop should work but that only queues up the files for burning to the CD. It doesn't actually burn until you do the second step.
Also you can select the files by highlighting them, right-click and Send To... D: (assuming D: is your burner drive)
Once they are queued up you have to right-click on the D: drive and select 'Write these files to CD' which starts the burn process.
An easier way to manage pictures is to use the free Picasa program from Google. Picasa catalogs all your photos on your system and making a backup or gift CD is as easy as a couple of clicks. I manage over 80,000 pictures on my system with Picasa.
Links:
Copy your files to a CD - Microsoft.com
Download free Picasa | | | |
| Q. | A compact disc has a diameter of about 12cm. What is its area in meters squared? | Related Search:
Mathematics | | | A compact disc has a diameter of about 12cm. What is its area in meters squared?
| | A. | 12cm=.12m
pi*.06^2
.0036pi msq | | | |
| Q. | How can I calculate the number of bits on a compact disc? | Related Search:
Homework Help | | | Can anyone help me with this...
A compact disk has a resolution of 16 bits and a sampling frequency of 40 kHz. If the recording lasts for 30 minutes, how many bits dose the disc contain?
Thanks a million to anyone who can help me.
| | A. | Sampling frequency of 40 kHz means 40 000 times per second. I am not sure exactly what the "resolution of 16 bits" means in respect of sound recording, but I will assume that it means that it reads 16 bits in each sample, so that the number of bits read per second is 40 000 x 16 = 640 000 bits, or 64 x 10^4.
If the recording lasts for 30 minutes, that is 30 x 60 = 1800 seconds,
then at a rate of 64 x 10^4 bits per second, the disc will have to contain
1800 x 64 x 10^4 bits, that is, 1152 x 10^6 bits. | | | |
| Q. | What is the Transformations of Energy of a Compact Disc? | Related Search:
Physics | | | We're doing a project on transformations of energy, and we had to choose an object. I chose a compact disc. I'm having trouble on what energy it was before it became a disc, and what energy does it become afterwards (I guess when it is recycled).
Thank you so much for whoever can help. This project is due Friday (procrastination = not good), so help ASAP is appreciated.
| | A. | What is was before and after is MASS. Unless you have a nuclear reaction taking place, energy is not converted to mass and mass is not converted to energy.
So you may want to consider how electrical energy, mechanical energy, sound energy and heat are involved in using a CD | | | |
| Q. | How do I clean a compact disc that has scratches? | Related Search:
Xbox | | | How do I clean a compact disc that has scratches manually?
| | A. | I agree about the toothpaste method. A friend told me and it sure sounded weird! But I watched her do it and ta-da! It worked.
But I disagree, I guess, with the method the other person suggested.
Instead of squeezing the toothpaste right onto the disk, squeeze it onto your finger. Then apply it to the disk. Add a little water (water does not hurt your CDs). Gently rub the disk using a small circular motion...with the water it will become like a liquid paste, like when you brush your teeth.
When you've rubbed all of the cd, rinse it off with water...you can just put it under the faucet on low pressure. Clean off your finger and continue with the circle motion to get all the paste off that might be stuck on the CD.
When you dry it you have to use a very gentle cloth...personally I wouldnt even use a papertowel because it can be too rough. Instead use a cloth like a shirt, or a tissue. Remember, when you're drying you want to work from the center, and go to the outside of the disk, in a straight motion. Rubbing in circles around the cd isnt good for it.
This method works for smaller scratches, even if there are alot. But if you have a really deep scratch I dont know if there is any way around it...you'll probably just have to buy the CD again. | | | |
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