A Test On Megabyte

Explanation
The correct answer is 10^6. In computer storage, a MB refers to a Megabyte, which is equal to 10^6 bytes. Therefore, 10^6 is the only option that is connected to a MB. The other options represent different quantities, such as 10^5 (100,000), 10^4 (10,000), and 10^7 (10,000,000), which are not equivalent to a Megabyte.

Explanation
The correct answer is 2^20 B because it represents the quantity of bytes most accurately. 2^30 B is a gigabyte, which is significantly larger than a megabyte. 2^25 B is in between a megabyte and a gigabyte, so it does not accurately describe a megabyte. 2^15 B is significantly smaller than a megabyte. Therefore, 2^20 B is the closest approximation to a megabyte.

Explanation
One minute of uncompressed CD audio takes up approximately 10 megabytes of space. Since there are 60 seconds in a minute, we can calculate that one second of uncompressed CD audio takes up approximately 0.167 megabytes of space (10 megabytes divided by 60 seconds). Therefore, a megabyte can equal approximately 6 seconds of uncompressed CD audio (1 megabyte divided by 0.167 megabytes/second).

Explanation
128 Kbit/s MP3 compressed music means that the music is compressed at a rate of 128 kilobits per second. To determine the size of the music file in megabytes, we need to convert kilobits to megabits and then to megabytes. Since there are 8 bits in a byte, 128 kilobits is equal to 16 kilobytes. Therefore, the music file is 16 kilobytes in size. Since there are 1024 kilobytes in a megabyte, the music file is approximately 0.0156 megabytes. Since the music is 0.0156 megabytes in size, it would take approximately 1 minute to play the music file.

Explanation
The parts of human DNA that distinguish one person from another can be compressed to approximately 4 megabytes. This suggests that the genetic information that makes each individual unique can be stored in a relatively small amount of digital data.

Explanation
One gigabyte is equal to one thousand megabytes in base 10. In the base 10 numbering system, each unit is multiplied by 10 to the power of the unit above it. Therefore, when converting from megabytes to gigabytes, we divide by 1000.

Explanation
In 1956, 5 MB weighed one ton.

Explanation
By 2020, it is estimated that 1.7 megabytes of data will be created for every human per second. This suggests that the amount of data being generated is increasing rapidly, highlighting the growing importance and reliance on digital information in our daily lives.

Explanation
A picture with 4 megapixels in JPEG format will be approximately 4 MB in size. This is because the size of a JPEG file depends on various factors such as the level of compression, color depth, and image content. Generally, a higher number of megapixels results in a larger file size as more data is captured and stored in the image. However, the specific size can vary depending on the compression algorithm used and the level of detail in the image.