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Apple released the MacBook Air with the Apple M1 system on a chip in November 2020, at WWDC20. A redesigned model based on the Apple M2 chip was released in July 2022, and the first 15-inch MacBook Air was released in June 2023. [4] In March 2024, Apple introduced M3 chip-equipped MacBook Airs in both their 13- and 15-inch sizes. [5]
The first MacBook Pro with Apple silicon, based on the Apple M1, was released in November 2020. The 14-inch and 16-inch MacBook Pros were released on October 26, 2021. Powered by either M1 Pro or M1 Max chips , they are the first to be available only with an Apple silicon system on a chip.
Apple M1 is a series of ARM-based system-on-a-chip (SoC) designed by Apple Inc., launched 2020 to 2022.It is part of the Apple silicon series, as a central processing unit (CPU) and graphics processing unit (GPU) for its Mac desktops and notebooks, and the iPad Pro and iPad Air tablets. [4]
MacBook: May 15, 2007 2007 May 15, 2007 MacBook Polycarbonate (Mid 2007) MacBook: November 1, 2007 June 5, 2007 MacBook Pro Aluminum (Mid 2007) MacBook Pro: November 1, 2007 August 7, 2007 iMac Aluminum 20" (Mid 2007) iMac: April 28, 2008 Mac Mini Intel (Mid 2007) Mac Mini: March 3, 2009 November 1, 2007 MacBook Pro Aluminum (Late 2007) MacBook Pro
1.0 short cwt (100 lb; 45 kg) long quarter: long qtr long qtr 1.0 long qtr (28 lb; 13 kg) short quarter: short qtr short qtr 1.0 short qtr (25 lb; 11 kg) stone: st st 14 lb used mostly in the British Commonwealth except Canada 1.0 st (14 lb; 6.4 kg) st kg. st kg lb; st lb. st lb kg; pound: lb lb 1.0 lb (0.45 kg) lb kg. lb kg st; lb st. lb st kg ...
In chemistry, the mass concentration ρ i (or γ i) is defined as the mass of a constituent m i divided by the volume of the mixture V. [1]= For a pure chemical the mass concentration equals its density (mass divided by volume); thus the mass concentration of a component in a mixture can be called the density of a component in a mixture.
In meteorology, mixing ratio usually refers to the mass ratio of water , which is defined as the mass of water divided by the mass of dry air in a given air parcel: [3] ζ = m H 2 O m a i r − m H 2 O {\displaystyle \zeta ={\frac {m_{\mathrm {H2O} }}{m_{\mathrm {air} }-m_{\mathrm {H2O} }}}}
Mass fraction can also be expressed, with a denominator of 100, as percentage by mass (in commercial contexts often called percentage by weight, abbreviated wt.% or % w/w; see mass versus weight). It is one way of expressing the composition of a mixture in a dimensionless size ; mole fraction (percentage by moles , mol%) and volume fraction ...