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9:28: Flight 93 is hijacked above northern Ohio, turning to the southeast. 9:37:46: Flight 77 crashes into the western side of The Pentagon. All 58 passengers and crew are killed aboard the aircraft including an additional 125 (including emergency workers) on the ground. The crash starts a violent fire.
The presidential transition of Joe Biden began on November 7, 2020, and ended on January 20, 2021. Unlike previous presidential transitions, which normally take place during the roughly 10-week period between the election in the first week of November and the inauguration on January 20, Biden's presidential transition was shortened somewhat because the General Services Administration under the ...
e. The president of the United States (POTUS) [B] is the head of state and head of government of the United States of America. The president directs the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces. The power of the presidency has grown substantially [12] since the first president ...
This is a list of the largest known epidemics and pandemics caused by an infectious disease in humans. Widespread non-communicable diseases such as cardiovascular disease and cancer are not included. An epidemic is the rapid spread of disease to a large number of people in a given population within a short period of time; in meningococcal ...
ChatGPT is a generative artificial intelligence chatbot [2][3] developed by OpenAI. Launched in 2022 based on the GPT-3.5 large language model (LLM), it was later updated to use the GPT-4 architecture. ChatGPT can generate human-like conversational responses and enables users to refine and steer a conversation towards a desired length, format ...
e. The number (; spelled out as " pi ") is a mathematical constant that is the ratio of a circle 's circumference to its diameter, approximately equal to 3.14159. The number appears in many formulae across mathematics and physics.
Laplace transform. In mathematics, the Laplace transform, named after Pierre-Simon Laplace (/ ləˈplɑːs /), is an integral transform that converts a function of a real variable (usually , in the time domain) to a function of a complex variable (in the complex-valued frequency domain, also known as s-domain, or s-plane).
Horizon: An American Saga is a film series consisting of four planned American epic westerns directed, co-written, and produced by, as well as starring Kevin Costner, from a script he co-wrote with Jon Baird and based on an original story co-written by Costner, Baird, and Mark Kasdan. The plot centers on fictional characters and takes place in ...