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2. Smartphone - Wikipedia

   en.wikipedia.org/wiki/Smartphone

   The "Sooner" prototype Android smartphone. A smartphone, often simply called a phone, is a mobile device that combines the functionality of a traditional mobile phone with advanced computing capabilities.

3. Blockade of Germany (1939–1945) - Wikipedia

   en.wikipedia.org/wiki/Blockade_of_Germany_(1939...

   The whaler on HMS Sheffield being manned with an armed boarding party to check a neutral vessel stopped at sea, 20 Oct 1941. The Blockade of Germany (1939–1945), also known as the Economic War, involved operations carried out during World War II by the British Empire and by France in order to restrict the supplies of minerals, fuel, metals, food and textiles needed by Nazi Germany – and ...

4. Gamma ray - Wikipedia

   en.wikipedia.org/wiki/Gamma_ray

   Gamma-ray sensors are also used for measuring the fluid levels in water and oil industries. [17] Typically, these use Co-60 or Cs-137 isotopes as the radiation source. In the US, gamma ray detectors are beginning to be used as part of the Container Security Initiative (CSI). These machines are advertised to be able to scan 30 containers per hour.

5. X-ray photoelectron spectroscopy - Wikipedia

   en.wikipedia.org/wiki/X-ray_photoelectron...

   XPS physics - the photoelectric effect.. Because the energy of an X-ray with particular wavelength is known (for Al K α X-rays, E photon = 1486.7 eV), and because the emitted electrons' kinetic energies are measured, the electron binding energy of each of the emitted electrons can be determined by using the photoelectric effect equation,

6. X-ray reflectivity - Wikipedia

   en.wikipedia.org/wiki/X-ray_reflectivity

   X-ray reflectivity (sometimes known as X-ray specular reflectivity, X-ray reflectometry, or XRR) is a surface-sensitive analytical technique used in chemistry, physics, and materials science to characterize surfaces, thin films and multilayers.

7. Copper - Wikipedia

   en.wikipedia.org/wiki/Copper

   Others store physical copper in the form of copper bars or rounds although these tend to carry a higher premium in comparison to precious metals. [184] Those who want to avoid the premiums of copper bullion alternatively store old copper wire , copper tubing or American pennies made before 1982 .