A:Digital data refers to information stored as zeros and ones, while analog data refers to other storage methods. While digital data has largely supplanted analog data, some prefer analog storage techniques. Many analog records have been replaced by digital storage.
A:Transistors function as current amplifiers or binary switches. With amplification, a small current controls a gate for a greater current. As switches, a 5-volt threshold (gate open) equals binary digit one, less than 5 volts (gate closed) equals binary zero.
A:According to the University of Southern California, radios work by encoding information on radio waves then broadcasting the radio wave with the encoded information onto a particular frequency. Both AM and FM radios use radio waves to transmit programs on radio stations.
A:Sound sensors work by detecting differences in air pressure and transforming them into electrical signals. Sound sensors such as microphones usually have built-in amplifiers that increase the strength of the incoming signal.
A:Although sophisticated spying technology is available for purchase that uses contact microphones and amplifiers to listen through walls, it's also possible to create a listening mechanism using a small drill and plastic wrap. Because of the way the plastic wrap vibrates as sound passes through it, the sound wave travels faster as it goes through the hole, allowing for focused and efficient transmission of the sound.
A:Fifty decibels is the level of noise of a quiet conversation at home or a quiet stream. In comparison, the general base of 70 decibels is the noise level of a vacuum cleaner or of radio and TV audio.
A:CSS stands for cascading style sheets, a style language used to add fonts, spacing, color and other stylistic elements to documents on the Internet. CSS is used to style documents written in markup languages such as HTML, XHTML and XML.
A:A binary code converter is a program that lets users convert binary code into simple text. Binary code is code used by computers based on the binary number system, a number system in which there are only two states, on and off, symbolized by zero and one.
A:The difference between megabytes and gigabytes is the number of bytes that make up each unit and the amount of data they hold. A megabyte holds a million bytes, or about 1,000 kilobytes. A gigabyte holds about a billion bytes, or around 1,000 megabytes.
A:According to Dictionary.com, computer technology is the activity of designing and constructing and programming computers. Computer technology directly correlates with information technology. Computer technology encompasses a developing list of different software programs and devices. Computer technology is also a very popular degree program offered by many colleges; this degree program tends to focus on learning current operating systems, hardware/software training and computer repair.
A:No machine can operate at 100 percent efficiency because some of the energy input will always be used to overcome the force of gravity and the effects of friction and air resistance. Even an optimally tuned engine heats up eventually, and that heat is thermal energy being lost.
A:Random Access Memory, or RAM, is used by computers to store and access information using a random order. This resource provides a temporary way for computers to process electronic data, while making computers more responsive and helping operate memory-intensive programs. RAM chips are only capable of storing and accessing information when electrical power is present.
A:Charles Babbage invented the first mechanical computer, called the Difference Engine, in 1821 and completed it in 1832. The Difference Engine could perform simple calculations and compile mathematical tables. Babbage later conceived the Analytical Engine, a device that could perform any calculation, but was unable to construct a prototype during his lifetime.
A:Computer processors perform calculations, while computer memory holds the information that processors access directly. Memory is sometimes used to refer to storage. In general, however, computer memory means computer RAM, which is an acronym for "random access memory."
A:The different types of media can be broken down into two categories: print and broadcast. The Internet is also emerging as a type of media, as more and more people are getting their news from the Internet.
A:A hypermedia database is a computer information retrieval system that allows a user to access and work on audio-visual recordings, text, graphics and photographs of a stored subject. The World Wide Web is a perfect example of a hypermedia database.
A:You can make a bootable USB using the Windows command line. Creating a USB boot drive varies with different operating systems, so check with the instructions for your operating system if you use something other than Microsoft Windows.
A:The first 8-inch floppy disks created in the 1970s had a capacity of 80 kilobytes. By 1986, IBM improved its design, resulting in the 3.5-inch floppy disk, which had a maximum capacity of 1.44 megabytes.