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For example, Paraffin has very large molecules and thus a high heat capacity per mole, but as a substance it does not have remarkable heat capacity in terms of volume, mass, or atom-mol (which is just 1.41 R per mole of atoms, or less than half of most solids, in terms of heat capacity per atom).
The heat can be more efficiently and quickly removed by directly cooling the local hot spots of the chip, within the package. At these locations, power dissipation of over 300 W/cm 2 (typical CPU is less than 100 W/cm 2) can occur, although future systems are expected to exceed 1000 W/cm 2. [44]
Ultralight backpacking (sometimes written as UL backpacking) is a style of lightweight backpacking that emphasizes carrying the lightest and least amount of gear. [1] While no technical standards exist, some hikers consider "ultralight" to mean an initial base weight of less than 4.5 kg (9.9 lb). [2]
These effects usually combine to give heat capacities lower than 3R per mole of atoms in the solid, although in molecular solids, heat capacities calculated per mole of molecules in molecular solids may be more than 3R. For example, the heat capacity of water ice at the melting point is about 4.6R per mole of molecules, but only 1.5R per mole ...
The earliest laptops used passive cooling; this gave way to heat sinks placed directly on the components to be cooled, but when these hot components are deep inside the device, a large space-wasting air duct is needed to exhaust the heat. Modern laptops instead rely on heat pipes to rapidly move waste heat towards the edges of the device, to ...
A 2-in-1 laptop, also known as 2-in-1 PC, 2-in-1 tablet, [1] laplet, [2] [3] tabtop, laptop tablet, or simply 2-in-1, is a portable computer that has features of both tablets and laptops. 2-in-1 PCs consist of portable computer components within light and thin chassis , and exemplify technological convergence .
The first commercially sold portable computer might be the 20-pound (9.1 kg) MCM/70, released 1974. [citation needed] The next major portables were the 50-pound (23 kg) IBM 5100 (1975), Osborne's 24-pound (11 kg) CP/M-based Osborne 1 (1981) and Compaq's 28-pound (13 kg), advertised as 100% IBM PC compatible Compaq Portable (1983).
The Ultrabook would be a thin (less than 0.8 inches thick [6]) notebook that utilized Intel processors, and would emphasize portability and a longer battery life than other laptops [5] [6] By this marketing initiative and the associated $300 million fund, Intel hoped to influence the slumping PC market against rising competition from ...