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1 day ago · t. e. The second law of thermodynamics is a physical law based on universal empirical observation concerning heat and energy interconversions. A simple statement of the law is that heat always flows spontaneously from hotter to colder regions of matter (or 'downhill' in terms of the temperature gradient).
1 day ago · v. t. e. In calculus, Taylor's theorem gives an approximation of a -times differentiable function around a given point by a polynomial of degree , called the -th-order Taylor polynomial. For a smooth function, the Taylor polynomial is the truncation at the order of the Taylor series of the function.
1 day ago · A photon (from Ancient Greek φῶς, φωτός (phôs, phōtós) 'light') is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force. Photons are massless particles that always move at the speed of light ...
1 day ago · Maximilian Karl Emil Weber ( / ˈveɪbər /; German: [maks ˈveːbɐ]; 21 April 1864 – 14 June 1920) was a German sociologist, historian, jurist, and political economist who was one of the central figures in the development of sociology and the social sciences more generally. His ideas continue to influence social theory and research .
1 day ago · Carl Friedrich Gauss in 1828. In mathematics, the differential geometry of surfaces deals with the differential geometry of smooth surfaces with various additional structures, most often, a Riemannian metric . Surfaces have been extensively studied from various perspectives: extrinsically, relating to their embedding in Euclidean space and ...
1 day ago · Botulinum toxin is used to treat a number of disorders characterized by overactive muscle movement, including cerebral palsy, [31] [32] post-stroke spasticity, [38] post-spinal cord injury spasticity, [39] spasms of the head and neck, [40] eyelid, [25] vagina, [41] limbs, jaw, and vocal cords. [42] Similarly, botulinum toxin is used to relax ...
