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  2. Thermal Micrometeoroid Garment - Wikipedia

    en.wikipedia.org/wiki/Thermal_Micrometeoroid_Garment

    Cross-section of layers in space suit construction. An (Integrated) Thermal Micrometeoroid Garment (TMG or ITMG) is the outer layer of a space suit.The TMG has three functions: to insulate the suit occupant and prevent heat loss, to shield the occupant from harmful solar radiation, and to protect the astronaut from micrometeoroids and other orbital debris, which could puncture the suit and ...

  3. Here's How to Give Gift Cards Through Cash App - AOL

    www.aol.com/heres-gift-cards-cash-app-222700737.html

    The good news is that using this new feature is a breeze: Simply open up your app and you can send a gift card just as you would buy stock, bitcoin, or reimburse a friend for last weekend's brunch.

  4. Earth's outer core - Wikipedia

    en.wikipedia.org/wiki/Earth's_outer_core

    Earth's outer core is a fluid layer about 2,260 km (1,400 mi) thick, composed of mostly iron and nickel that lies above Earth's solid inner core and below its mantle. [ 1 ] [ 2 ] [ 3 ] The outer core begins approximately 2,889 km (1,795 mi) beneath Earth's surface at the core-mantle boundary and ends 5,150 km (3,200 mi) beneath Earth's surface ...

  5. Layered clothing - Wikipedia

    en.wikipedia.org/wiki/Layered_clothing

    The purpose of the inner layer is to draw sweat away from the skin to the outer layers to make them feel warmer. If a piece of clothing does not transfer moisture well, it is not strictly an inner layer garment but simply a mid-layer garment. Wool has a combination of wicking and water-repelling properties [1] and is highly odour-resistant. [2]

  6. Core–mantle boundary - Wikipedia

    en.wikipedia.org/wiki/Core–mantle_boundary

    P-wave velocities are much slower in the outer core than in the deep mantle while S-waves do not exist at all in the liquid portion of the core. Recent evidence suggests a distinct boundary layer directly above the CMB possibly made of a novel phase of the basic perovskite mineralogy of the deep mantle named post-perovskite.

  7. Printed circuit board - Wikipedia

    en.wikipedia.org/wiki/Printed_circuit_board

    In multi-layer boards, the layers of material are laminated together in an alternating sandwich: copper, substrate, copper, substrate, copper, etc.; each plane of copper is etched, and any internal vias (that will not extend to both outer surfaces of the finished multilayer board) are plated-through, before the layers are laminated together ...

  8. Earth's mantle - Wikipedia

    en.wikipedia.org/wiki/Earth's_mantle

    Earth's mantle is a layer of silicate rock between the crust and the outer core. It has a mass of 4.01 × 10 24 kg (8.84 × 10 24 lb) and makes up 67% of the mass of Earth. [1] It has a thickness of 2,900 kilometers (1,800 mi) [1] making up about 46% of Earth's radius and 84% of Earth's volume.

  9. Double-clad fiber - Wikipedia

    en.wikipedia.org/wiki/Double-clad_fiber

    Double-clad fiber (DCF) is a class of optical fiber with a structure consisting of three layers of optical material instead of the usual two. The inner-most layer is called the core. It is surrounded by the inner cladding, which is surrounded by the outer cladding. The three layers are made of materials with different refractive indices.