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The iPad Pro was released in 2015 alongside the Apple Pencil, and was the first iPad to use the Pencil as an input device. The iPad Pro was first sold in November 2015 at a screen size of 12.9 inches, larger than all previous iPad models. [7] [8] A smaller 9.7 inch model, based on the form factor of the iPad Air 2, was released in March 2016. [9]
The first generation of iPad Pro came in two sizes: 12.9-inch and 9.7-inch. The 12.9-inch version was announced on September 9, 2015 [ 12 ] and released on November 11, 2015. [ 13 ] It was larger than all previous iPad models, and was the first iPad to feature LPDDR4 RAM. [ 1 ]
The chart was designed by Ian Bailey [5] and Jan E. Lovie-Kitchin at the National Vision Research Institute of Australia. [1] [3] They described their motivation for designing the LogMAR chart as follows: "We have designed a series of near vision charts in which the typeface, size progression, size range, number of words per row and spacings were chosen in an endeavour to achieve a ...
One radian is defined as the angle at the center of a circle in a plane that subtends an arc whose length equals the radius of the circle. [6] More generally, the magnitude in radians of a subtended angle is equal to the ratio of the arc length to the radius of the circle; that is, =, where θ is the magnitude in radians of the subtended angle, s is arc length, and r is radius.
The partial sums of the series 1 + 2 + 3 + 4 + 5 + 6 + ⋯ are 1, 3, 6, 10, 15, etc.The nth partial sum is given by a simple formula: = = (+). This equation was known ...
The decibel originates from methods used to quantify signal loss in telegraph and telephone circuits. Until the mid-1920s, the unit for loss was miles of standard cable (MSC). 1 MSC corresponded to the loss of power over one mile (approximately 1.6 km) of standard telephone cable at a frequency of 5000 radians per second (795.8 Hz), and matched closely the smallest attenuation detectable to a ...
Their orbit is moderately eccentric, as it has an eccentricity of almost 0.52; [5] their closest approach or periastron is 11.2 AU (1.68 × 10 ^ 9 km), or about the distance between the Sun and Saturn; and their furthest separation or apastron is 35.6 AU (5.33 × 10 ^ 9 km), about the distance between the Sun and Pluto. [16]
Pennsylvania (/ ˌ p ɛ n s ɪ l ˈ v eɪ n i ə / ⓘ PEN-sil-VAY-nee-ə, lit. ' Penn's forest country '), officially the Commonwealth of Pennsylvania [b] (Pennsylvania Dutch: Pennsilfaani), [7] is a U.S. state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States.