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Idaho National Laboratory ran the Aurora Generator Test in 2007 to demonstrate how a cyberattack could destroy physical components of the electric grid. [1] The experiment used a computer program to rapidly open and close a diesel generator 's circuit breakers out of phase from the rest of the grid, thereby subjecting the engine to abnormal ...
From January 2020 onwards, an additional Paper-III is being introduced for B.Planning courses separately. [4] Due to the COVID-19 pandemic in 2020, JEE-Main 2021 has a change in paper format and number of attempts. Now there will be 20 single choice questions and 10 numerical questions out of which only five numerical questions are to be attempted.
Part A is a preliminary screening test. There are about 50 questions in this part having negative marking. Correct answers carry +2.0 marks and wrong answers carry -0.5 marks (negative). Each question in this part checks general knowledge and awareness. Part B is evaluated for those candidates who are short listed in the screening test (Part A).
The following is a list of notable unsolved problems grouped into broad areas of physics. [1]Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result.
When a photon interacts with an atomic nucleus, electron-positron pairs can be generated in case the energy of the photon matches the required threshold energy, which is the combined electron-positron rest energy of 1.02 MeV. However, if the photon energy is even higher, then the exceeding energy is converted into kinetic energy of the particles.
In 2020, the exam was postponed to the first Thursday in December (December 3) due to the COVID-19 pandemic. The Korean Education Ministry is planning to remove "killer questions" from the Suneung in 2024 after a failed attempt to do so in 2023, citing an excessive reliance on private education and academic pressure. [29]
A key question related to the consistency is the Yang–Mills existence and mass gap problem. Experiments indicate that neutrinos have mass, which the classic Standard Model did not allow. [60] To accommodate this finding, the classic Standard Model can be modified to include neutrino mass, although it is not obvious exactly how this should be ...
Using only a low head drop in a river or tidal flows to create electricity may provide a renewable energy source that will have a minimal impact on the environment. Since the generated power (calculated the same as per general hydropower ) is a function of the head these systems are typically classed as small-scale hydropower, which have an ...