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The clean air delivery rate (CADR) of a four-filter, US$75 design were estimated at between 165–239 cubic feet (4.7–6.8 m 3) per minute (depending on fan speed) in an August 2021 case study by UC Davis researchers. [24] In April 2022, a team based at UC Davis published a study of a Corsi–Rosenthal Box that used five two-inch MERV-13 filters.
Ordering the 15-inch MacBook Air started on June 5, with the general availability having started on June 13. [44] On March 4, 2024, Apple announced a refreshed M3 MacBook Air in both 13-inch and 15-inch sizes. This model retains the same design as the M2 MacBook Air but adds support for two external displays when the lid is closed. [45]
As part of the Mac transition to Intel processors, Apple released a 13-inch laptop simply named "MacBook", as a successor to the PowerPC-based iBook series of laptops. . During its existence, it was the most affordable Mac, serving as the entry-level laptop that was less expensive than the rest of the Mac laptop lineup (the MacBook Pro portable workstation, and later the MacBook Air ultra-port
The MacBook and the 13-inch MacBook Pro use a 60 W MagSafe charger, whereas the 15- and 17-inch MacBook Pro use an 85 W version. The MacBook Air used a lower-powered 45 W version. According to Apple, an adapter with a higher wattage than that originally provided may be used without problems. [12]
The 13-inch and 15-inch MacBook Pros (2016–19) were criticized for its keyboard's unreliability, and the USB-C-only port configuration. The Touch Bar MacBook Pro was released in October 2016. It was the thinnest MacBook Pro ever made, replaced all ports with four Thunderbolt 3 (USB-C) ports, gained a thinner "Butterfly" keyboard, and replaced ...
The MacBook Air was introduced in January 2008 with a 13.3-inch screen, and was promoted as the world's thinnest notebook, opening a laptop category known as the ultrabook family. Apple released a redesigned MacBook Air in October 2010, with a redesigned tapered chassis, standard solid-state storage , and added a smaller 11.6-inch version.
The fan works by drawing air in through an inlet in the base pillar and forcing it through an outlet in the upper ring. The jet of air travels over the airfoil shape of the ring, creating local low pressure, thereby pulling air from behind it as it decelerates in a process known as "induction". [40]
Black polycarbonate MacBook (early 2006) White polycarbonate MacBook (early 2006) The original MacBook, available in black or white colors, was released on May 16, 2006, and used the 32-bit Intel Core Duo processor and 945GM chipset, with Intel's GMA 950 integrated graphics on a 667 MHz front side bus.