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  2. Comparison of HP graphing calculators - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_HP_graphing...

    Comparison of HP graphing calculators. A graphing calculator is a class of hand-held calculator that is capable of plotting graphs and solving complex functions. While there are several companies that manufacture models of graphing calculators, Hewlett-Packard is a major manufacturer. The following table compares general and technical ...

  3. Carbon footprint - Wikipedia

    en.wikipedia.org/wiki/Carbon_footprint

    The carbon footprint explained Comparison of the carbon footprint of protein-rich foods [1]. A formal definition of carbon footprint is as follows: "A measure of the total amount of carbon dioxide (CO 2) and methane (CH 4) emissions of a defined population, system or activity, considering all relevant sources, sinks and storage within the spatial and temporal boundary of the population, system ...

  4. Bitcoin - Wikipedia

    en.wikipedia.org/wiki/Bitcoin

    On 3 January 2009, the bitcoin network was created when Nakamoto mined the starting block of the chain, known as the genesis block. [17] Embedded in this block was the text "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks ", which is the date and headline of an issue of The Times newspaper. [ 7 ]

  5. Human penis size - Wikipedia

    en.wikipedia.org/wiki/Human_penis_size

    The same review analyzed the results from ten prior studies where measurements of erect penis size were made by researchers. They reported an erect penis to be between 12.95 and 13.92 cm (5.1 and 5.5 inches, respectively) in length, a result significantly below the average obtained in self-reported studies.

  6. Rebar - Wikipedia

    en.wikipedia.org/wiki/Rebar

    Rebar (short for reinforcing bar ), known when massed as reinforcing steel or steel reinforcement, [ 1] is a steel bar used as a tension device in reinforced concrete and reinforced masonry structures to strengthen and aid the concrete under tension. Concrete is strong under compression, but has low tensile strength.

  7. Comparison of video codecs - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_video_codecs

    MSU MPEG-4 codecs comparison Objective comparison of MPEG-4 codecs 2005 Mar. DivX 5.2.1, DivX 4.12, DivX 3.22, MS MPEG-4 3688 v3, XviD 1.0.3, 3ivx D4 4.5.1, OpenDivX 0.3 Different versions of DivX were also compared. The Xvid results may be erroneous, as deblocking was disabled for it while used for DivX. Subjective Comparison of Modern Video ...

  8. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/Hardness_comparison

    Hardness comparison. A variety of hardness -testing methods are available, including the Vickers, Brinell, Rockwell, Meyer and Leeb tests. Although it is impossible in many cases to give an exact conversion, it is possible to give an approximate material-specific comparison table for steels .

  9. Comparison of audio coding formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_audio_coding...

    The 'Music' category is merely a guideline on commercialized uses of a particular format, not a technical assessment of its capabilities. For example, MP3 and AAC dominate the personal audio market in terms of market share, though many other formats are comparably well suited to fill this role from a purely technical standpoint.