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  1. 15 hours ago · The Schrödinger equation is a linear differential equation, meaning that if two state vectors and are solutions, then so is any linear combination. of the two state vectors where a and b are any complex numbers. [13] : 25 Moreover, the sum can be extended for any number of state vectors.

    • Scalar Potential

      The fact that the line integral depends on the path C only...

    • Hamiltonian

      In quantum mechanics, the Hamiltonian of a system is an...

    • Matrix Mechanics

      Matrix mechanics is a formulation of quantum mechanics...

  2. 15 hours ago · Birth control, also known as contraception, anticonception, and fertility control, is the use of methods or devices to prevent unintended pregnancy. [1] Birth control has been used since ancient times, but effective and safe methods of birth control only became available in the 20th century. [2] Planning, making available, and using human birth ...

  3. 15 hours ago · Exports are down 50%. For the first three months of 2009 GDP has shrunk by 2%. Households and small businesses are heavily in debt. June 25, 2009: Colombia. Colombia enters into recession after witnessing 0.7% contraction in the last quarter of 2008 and 0.6% in the following quarter. [84] June 30, 2009: Turkey.

  4. en.wikipedia.org › wiki › RoboticsRobotics - Wikipedia

    15 hours ago · Robotics is the interdisciplinary study and practice of the design, construction, operation, and use of robots. [1] Within mechanical engineering, robotics is the design and construction of the physical structures of robots, while in computer science, robotics focuses on robotic automation algorithms. Other disciplines contributing to robotics ...

  5. 15 hours ago · Totalitarianism is a political system and a form of government that prohibits opposition political parties, disregards and outlaws the political claims of individual and group opposition to the state, and controls the public sphere and the private sphere of society. In the field of political science, totalitarianism is the extreme form of ...

  6. en.wikipedia.org › wiki › BisexualityBisexuality - Wikipedia

    15 hours ago · Bisexuality is a romantic or sexual attraction or behavior toward both males and females ( gender binary ), [1] [2] [3] to more than one gender, [4] or to both people of the same gender and different genders. [5] It may also be defined to include romantic or sexual attraction to people regardless of their sex or gender identity, which is also ...

  7. en.wikipedia.org › wiki › EugenicsEugenics - Wikipedia

    15 hours ago · t. e. Eugenics ( / juːˈdʒɛnɪks / yoo-JEN-iks; from Ancient Greek εύ̃ (eû) 'good, well', and -γενής (genḗs) 'come into being, growing') [1] is a set of beliefs and practices that aim to improve the genetic quality of a human population. [2] [3] [4] Historically, eugenicists have attempted to alter human gene pools by excluding ...

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