genre tom corbett
___MASK96___ or TV is a telecommunication medium used for transmitting moving images in monochrome ( black - and - white ), or in color , and in two or three dimensions and sound . It can refer to a ___MASK96___ set , a ___MASK96___ program (" TV show "), or the medium of ___MASK96___ transmission . ___MASK96___ is a ___MASK83___ medium , for ___MASK7___ , education , news , and advertising . In ___MASK99___ and electrical engineering , a conductor is an object or type of material that allows the flow of an electrical current in one or more directions . A metal wire is a common electrical conductor . Electrical current is generated by the flow of negatively charged electrons , positively charged holes , and positive or negative ions in some cases . Heinlein juveniles are the novels written by Robert A . Heinlein aimed for what would now be known as the " young ___MASK3___ " market . The core group are the twelve Heinlein novels published by Scribner ' s between 1947 and 1958 . A thirteenth , " Starship Troopers ", was submitted to Scribner ' s but rejected and instead published by Putnam . A fourteenth novel , " Podkayne of Mars ", is often listed as a " Heinlein juvenile ", although Heinlein himself did not consider it to be one . Frequency is the number of occurrences of a repeating event per unit time . It is also referred to as temporal frequency , which emphasizes the contrast to spatial frequency and angular frequency . The period is the duration of time of one cycle in a repeating event , so the period is the reciprocal of the frequency . For example , if a newborn baby ' s heart beats at a frequency of 120 times a minute , its period  the time interval between beats  is half a second ( that is , 60 seconds divided by 120 beats ). Frequency is an important parameter used in ___MASK25___ and engineering to specify the rate of oscillatory and vibratory phenomena , such as mechanical vibrations , audio ( sound ) signals , ___MASK20___ waves , and light . ___MASK20___ waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light . ___MASK20___ waves have frequencies as high as 300 GHz to as low as 3 kHz , though some definitions describe waves above 1 or 3 GHz as microwaves , or include waves of any lower frequency . At 300 GHz , the corresponding wavelength is , and at 3 kHz is . Like all other electromagnetic waves , they travel at the speed of light . Naturally occurring ___MASK20___ waves are generated by lightning , or by astronomical objects . A ___MASK96___ set , more commonly called a ___MASK96___ , TV , TV set , ___MASK96___ receiver , or telly , is a device that combines a tuner , display , and loudspeakers for the purpose of viewing ___MASK96___ . Introduced in the late 1920s in mechanical form , ___MASK96___ sets became a popular consumer product after World ___MASK100___ II in electronic form , using cathode ray tubes . The addition of color to broadcast ___MASK96___ after 1953 further increased the popularity of ___MASK96___ sets in the 1960s , and an outdoor antenna became a common feature of suburban homes . The ubiquitous ___MASK96___ set became the display device for the first recorded media in the 1970s , such as Betamax , VHS and later DVD . It was also the display device for the first generation of home computers ( e . g ., Timex Sinclair 1000 ) and video game consoles ( e . g ., Atari ) in the 1980s . In the 2010s flat panel ___MASK96___ incorporating liquid - crystal displays , especially LED - backlit LCDs , largely replaced cathode ray tubes and other displays . ___MASK14___ ( often shortened to SF , sci - fi or scifi ) is a genre of speculative fiction , typically dealing with imaginative concepts such as futuristic science and technology , space travel , time travel , faster than light travel , parallel universes , and extraterrestrial life . ___MASK14___ often explores the potential consequences of scientific and other innovations , and has been called a " literature of ideas ." It usually avoids the supernatural , and unlike the related genre of fantasy , historically ___MASK14___ stories were intended to have a grounding in science - based fact or theory at the time the story was created , but this connection is now limited to hard ___MASK14___ . The amplitude of a periodic variable is a measure of its change over a single period ( such as time or spatial period ). There are ___MASK33___ definitions of amplitude ( see below ), which are all functions of the magnitude of the difference between the variable ' s extreme values . In older texts the phase is sometimes called the amplitude . ___MASK30___ Cadet is a 1948 ___MASK14___ novel by Robert A . Heinlein about Matt Dodson , who joins the ___MASK30___ Patrol to help preserve peace in the Solar System . The story translates the standard military academy story into outer space : a boy from Iowa goes to officer school , sees action and adventure , shoulders responsibilities far beyond his experience , and becomes a man . It was published as the second of the series of Heinlein juveniles and inspired the Tom Corbett , ___MASK30___ Cadet media empire , including the 1950s television series and radio show which made " ___MASK30___ Cadet " a household phrase whose meaning later shifted in popular culture . ___MASK54___ is that which informs . In other words , it is the answer to a question of some kind . It is thus related to data and knowledge , as data represents values attributed to parameters , and knowledge signifies understanding of real things or ___MASK68___ concepts . As it regards data , the information ' s existence is not necessarily coupled to an observer ( it exists beyond an event horizon , for example ), while in the case of knowledge , the information requires a cognitive observer . A ___MASK96___ program is a segment of content intended for broadcast on over - the - air , cable ___MASK96___ , or Internet ___MASK96___ , other than a commercial , trailer , or any other segment of content not serving as attraction for viewership . It may be a single production , or more commonly , a series of related productions ( also called a ___MASK31___ or a ___MASK96___ show ). Robert Anson Heinlein ( July 7 , 1907  May 8 , 1988 ) was an American ___MASK25___ - ___MASK21___ writer . Often called the " dean of ___MASK14___ writers ", he was and continues to be an influential and controversial author of the genre . A ___MASK13___ academy or service academy ( in " American English ") is an educational institution which prepares candidates for service in the officer corps of the army , the navy , marine corps , air force or coast guard . It normally provides education in a ___MASK13___ environment , the exact definition depending on the country concerned . ___MASK73___ (" science of craft ", from Greek , " techne ", " art , ___MASK40___ , cunning of hand "; and , "- logia ") is the collection of techniques , skills , methods and processes used in the production of goods or services or in the accomplishment of objectives , such as scientific investigation . ___MASK73___ can be the knowledge of techniques , processes , and the like , or it can be embedded in machines which can be operated without detailed knowledge of their workings . ___MASK60___ ( Network extensible Window System ) is a discontinued windowing system developed by Sun Microsystems in the mid - 1980s . Originally known as " SunDew ", its primary authors were ___MASK42___ Gosling and David S . H . Rosenthal . The ___MASK60___ interpreter was based on PostScript ( as was the later Display PostScript , although the two projects were otherwise unrelated ) extending it to allow interaction and multiple " contexts " to support windows . Like PostScript , ___MASK60___ could be used as a complete programming language , but unlike PostScript , ___MASK60___ could be used to make complete interactive programs with mouse support and a GUI . Tom Corbett is the main character in a series of Tom Corbett -- ___MASK30___ Cadet stories that were depicted in television , radio , books , ___MASK64___ books , ___MASK64___ strips , and other media in the 1950s . The stories followed the adventures of Corbett , Astro , originally Roger Manning and later T . J . Thistle , cadets at the ___MASK30___ Academy as they train to become members of the Solar Guard . The action takes place at the Academy in classrooms and bunkrooms , aboard their training ship the rocket cruiser Polaris , and on alien worlds , both within the solar system and in orbit around nearby stars . Monochrome describes paintings , drawings , ___MASK46___ , or photographs in one color or values of one color . A monochromatic object or image reflects colors in shades of limited colors or hues . Images using only shades of grey ( with or without black or white ) are called grayscale or black - and - white . However , scientifically speaking , monochromatic light refers to visible light of a narrow band of wavelengths ( see spectral color ). ___MASK56___ is an audio or visual form of marketing communication that employs an openly sponsored , nonpersonal message to promote or sell a product , service or idea . Sponsors of ___MASK56___ are often businesses who wish to promote their products or services . ___MASK56___ is differentiated from public relations in that an advertiser usually pays for and has control over the message . It is differentiated from personal selling in that the message is nonpersonal , i . e ., not directed to a particular individual . ___MASK56___ is communicated through various ___MASK83___ media , including old media such as newspapers , magazines , Television , Radio , outdoor ___MASK56___ or direct mail ; or new media such as search results , blogs , websites or text messages . The actual presentation of the message in a medium is referred to as an advertisement or " ad ". ___MASK7___ is a form of activity that holds the attention and interest of an audience , or gives pleasure and delight . It can be an idea or a task , but is more likely to be one of the activities or events that have developed over thousands of years specifically for the purpose of keeping an audience ' s attention . Although people ' s attention is held by different things , because individuals have different preferences in ___MASK7___ , most forms are recognisable and familiar . Storytelling , music , drama , dance , and different kinds of performance exist in all cultures , were supported in royal courts , developed into sophisticated forms and over time became available to all citizens . The process has been accelerated in modern times by an ___MASK7___ industry that records and sells ___MASK7___ products . ___MASK7___ evolves and can be adapted to suit any scale , ranging from an individual who chooses a private ___MASK7___ from a now enormous array of pre - recorded products ; to a banquet adapted for two ; to any size or type of party , with appropriate music and dance ; to performances intended for thousands ; and even for a global audience . In ___MASK99___ , energy is the property that must be transferred to an object in order to perform work on  or to heat  the object , and can be converted in form , but not created or destroyed . The SI unit of energy is the joule , which is the energy transferred to an object by the mechanical work of moving it a distance of 1 metre against a force of 1 newton . ___MASK20___ is the ___MASK73___ of using radio waves to carry information , such as sound , by systematically modulating properties of electromagnetic energy waves transmitted through space , such as their amplitude , frequency , phase , or pulse width . When radio waves strike an electrical conductor , the oscillating fields induce an alternating current in the conductor . The information in the waves can be extracted and transformed back into its original form .