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How are images and sound converted to binary?
Each image has a certain number of pixels depending on the size (ex: 5mp camera takes shots that contain 5,000,000 pixels of color). The conversion begins from left to right, top to bottom, similar to reading words on a page. The first pixel is first converted into it's color code (a six digit code that all colors on a chart are organized by), and then that six digit code is converted into a binary string. So if the first pixel is medium gray, the color code is 646464, that code is then converted to binary using the binary numbering system. So 6=110 and 4=100, so the first medium gray pixel is 110100110100110100, then the next pixel is translated in the same manner and the string is continued. So if you had a 5mp medium gray image, the binary string would contain 80 million digits of 1s and 0s. Different color images would create larger strings
If a thunderstorm is 10 kilometers away How long does it take for the sound to reach you after you see the lightning?
Just under 30 seconds. The speed of sound in air is 1100 feet per second. To cover 10K (which is 6.2 miles), you could multiply 6.2 by 5,280 (the number of feet in a mile), which gives you 32,736 ft. Then divide the number of feet by the speed of sound, and you get 29.76 seconds. Roughly converted the speed of sound is 330 meters per second so it takes 3 second per kilometer, so 30 seconds
Why does 6 look like b?
It is simply a coincidence. The number 6 is from Indo-Arabic system, whereas the letter b is or Roman origin. The symbol for that sound in other alphabets is quite different.
Why the sound comes out from computer speaker is analog?
Because our brains lack the capability to de-code digital signals. Therefore, any digital sound must be converted to analogue (and be within a specific frequency range) for us to hear it.
What are interesting facts about the number 4?
In China it's an unlucky number, cause the sound of 4 resembles the sound of death. You will not find Chinese phone numbers containing the digit 4.
