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  2. Beryllium-8 - Wikipedia

    en.wikipedia.org/wiki/Beryllium-8

    Namely, 8 Be decays with a half-life of 8.19 × 10 −17 seconds. [9] Beryllium-8 is the only unstable nuclide with the same even number ≤ 20 of protons and neutrons. It is also one of the only two unstable nuclides (the other is helium-5) with mass number ≤ 143 which are stable to both beta decay and double beta decay.

  3. District Level Examination - Wikipedia

    en.wikipedia.org/wiki/District_Level_Examination

    The Basic Level Examination (BLE) (Nepali: आधारभूत तह परिक्षा), now known as the Basic Education Examination (BEE) or "'District Level Examination ( DLE )'"(Nepali: जिल्ला स्तरीय परिक्षा), is an Examination taken in District Level especially in Eighth Grade in Nepal.

  4. List of unsolved problems in physics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    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.

  5. Secondary Education Examination (Nepal) - Wikipedia

    en.wikipedia.org/wiki/Secondary_Education...

    Secondary Education Examination (SEE) is the final examination in the secondary school system of Nepal which is being taken by National Examination Board .National Examination Board upgraded from what was previously known as School Leaving Certificate (SLC).

  6. Double pendulum - Wikipedia

    en.wikipedia.org/wiki/Double_pendulum

    A double pendulum consists of two pendulums attached end to end.. In physics and mathematics, in the area of dynamical systems, a double pendulum, also known as a chaotic pendulum, is a pendulum with another pendulum attached to its end, forming a simple physical system that exhibits rich dynamic behavior with a strong sensitivity to initial conditions. [1]

  7. Cavendish experiment - Wikipedia

    en.wikipedia.org/wiki/Cavendish_experiment

    Two massive 12-inch (300 mm), 348-pound (158 kg) lead balls, suspended separately, could be positioned away from or to either side of the smaller balls, 8.85 inches (225 mm) away. [9] The experiment measured the faint gravitational attraction between the small and large balls, which deflected the torsion balance rod by about 0.16" (or only 0.03 ...

  8. Bluetooth Low Energy - Wikipedia

    en.wikipedia.org/wiki/Bluetooth_Low_Energy

    Bluetooth Low Energy (Bluetooth LE, colloquially BLE, formerly marketed as Bluetooth Smart [1]) is a wireless personal area network technology designed and marketed by the Bluetooth Special Interest Group (Bluetooth SIG) [2] aimed at novel applications in the healthcare, fitness, beacons, [3] security, and home entertainment industries. [4]

  9. Academic grading in India - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_India

    Many colleges outside India favour CBSE and ICSE; those colleges either outright disallow students from other boards (e.g.: University of Oxford [1]) or require them to write additional examinations (e.g.: National University of Singapore).