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United States National Aeronautics and Space Administration: An independent Federal agency established in 1958. It conducts research for the solution of problems of flight within and outside the Earth's atmosphere and develops, constructs, tests, and operates aeronautical and space vehicles. (From U.S. Government Manual, 1993)

Diffusion and Osmosis- Concept

JoVE 10622

Cell Membranes and Diffusion

In order to function, cells are required to move materials in and out of their cytoplasm via their cell membranes. These membranes are semipermeable, meaning that certain molecules are allowed to pass through, but not others. This movement of molecules is mediated by the phospholipid bilayer and its embedded proteins, some of which act as transport channels…

 Lab Bio

Newton's Law of Universal Gravitation

JoVE 10325

Source: Ketron Mitchell-Wynne, PhD, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA


Legend states that Isaac Newton saw an apple fall from a tree. He noticed the acceleration of the apple and deduced that there must have been a force acting upon the apple.…

 Physics I

Scattering And Absorption of Light in Planetary Regoliths

1Department of Physics, University of Helsinki, 2Finnish Geospatial Research Institute FGI, National Land Survey, 3Max Planck Institute for Solar System Research, 4Institute of Physics and Technology, Ural Federal University, 5Institut für Geophysik und Extraterrestrische Physik, Technische Universität Braunschweig, 6Space Science Institute, 7Army Research Laboratory

JoVE 59607

 Engineering
123456
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