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  2. Desmos - Wikipedia

    en.wikipedia.org/wiki/Desmos

    The name Desmos came from the Greek word δεσμός which means a bond or a tie. [6] In May 2022, Amplify acquired the Desmos curriculum and teacher.desmos.com. Some 50 employees joined Amplify. Desmos Studio was spun off as a separate public benefit corporation focused on building calculator products and other math tools. [7]

  3. Delta-v budget - Wikipedia

    en.wikipedia.org/wiki/Delta-v_budget

    Launch to LEO—this not only requires an increase of velocity from 0 to 7.8 km/s, but also typically 1.5–2 km/s for atmospheric drag and gravity drag [citation needed] Re-entry from LEO—the delta-v required is the orbital maneuvering burn to lower perigee into the atmosphere, atmospheric drag takes care of the rest.

  4. Windows Calculator - Wikipedia

    en.wikipedia.org/wiki/Windows_Calculator

    A simple arithmetic calculator was first included with Windows 1.0. [5]In Windows 3.0, a scientific mode was added, which included exponents and roots, logarithms, factorial-based functions, trigonometry (supports radian, degree and gradians angles), base conversions (2, 8, 10, 16), logic operations, statistical functions such as single variable statistics and linear regression.

  5. Propellant mass fraction - Wikipedia

    en.wikipedia.org/wiki/Propellant_mass_fraction

    In rockets for a given target orbit, a rocket's mass fraction is the portion of the rocket's pre-launch mass (fully fueled) that does not reach orbit.The propellant mass fraction is the ratio of just the propellant to the entire mass of the vehicle at takeoff (propellant plus dry mass).

  6. Porkchop plot - Wikipedia

    en.wikipedia.org/wiki/Porkchop_plot

    By examining the results of the porkchop plot, engineers can determine when a launch opportunity exists (a 'launch window') that is compatible with the capabilities of a particular spacecraft. [2] A given contour, called a porkchop curve , represents constant C 3 , and the center of the porkchop the optimal minimum C 3 .

  7. TI-Nspire series - Wikipedia

    en.wikipedia.org/wiki/TI-Nspire_series

    The colors of the calculator are still the same as those of the TI-Nspire models; the CX is white and dark blue, while the CX CAS is gray and black. The external connectors have changed slightly. The mini-USB port, located at the center on the top of the TI-Nspire series, has moved to the right on the top on the CX series.

  8. Two-line element set - Wikipedia

    en.wikipedia.org/wiki/Two-line_element_set

    International Designator (last two digits of launch year) 98 5: 12–14: International Designator (launch number of the year) 067 6: 15–17: International Designator (piece of the launch) A 7: 19–20: Epoch year (last two digits of year) 08 8: 21–32: Epoch (day of the year and fractional portion of the day) 264.51782528 9: 34–43

  9. Launch commit criteria - Wikipedia

    en.wikipedia.org/wiki/Launch_commit_criteria

    The following should delay launch: delay launch for 15 minutes if field mill instrument readings within 9.3 kilometres (5 nmi) of the launch pad exceed +/- 1,500 volts per meter, or +/- 1,000 volts per meter, delay launch for 30 minutes after lightning is observed within 10 nautical miles (19 km; 12 mi) of the launch pad or the flight path.