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  2. Deadheading - Wikipedia

    en.wikipedia.org/wiki/Deadheading

    Deadheading can refer to the following: Dead mileage, the movement of commercial vehicles in non-revenue mode for logistical reasons; Deadheading (flowers), the pruning of dead flower heads; Deadheading (employee), carrying, free of charge, a transport company's own staff on a normal passenger trip

  3. Dead reckoning - Wikipedia

    en.wikipedia.org/wiki/Dead_reckoning

    The navigator plots their 9 a.m. position, indicated by the triangle, and, using their course and speed, estimates their own position at 9:30 and 10 a.m. In navigation , dead reckoning is the process of calculating the current position of a moving object by using a previously determined position, or fix , and incorporating estimates of speed ...

  4. Deadheading (employee) - Wikipedia

    en.wikipedia.org/wiki/Deadheading_(employee)

    Deadheading is the practice of carrying, free of charge, a transport company's own staff on a normal passenger trip so that they can be in the right place to begin their duties. In United States railway usage, the term may also be used for movement of train crews to or from a train using another means of vehicular transportation, [ 1 ] as ...

  5. Dead mileage - Wikipedia

    en.wikipedia.org/wiki/Dead_mileage

    A Transperth bus is doing a dead mileage run back to the depot, so the destination sign reads "Not in Service 000".. Dead mileage, dead running, light running, empty cars or deadheading in public transport and empty leg in air charter is when a revenue-gaining vehicle operates without carrying or accepting passengers, such as when coming from a garage to begin its first trip of the day.

  6. Glossary of chemistry terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemistry_terms

    Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...

  7. Natural science - Wikipedia

    en.wikipedia.org/wiki/Natural_science

    Natural science can be divided into two main branches: life science and physical science. Life science is alternatively known as biology, and physical science is subdivided into branches: physics, chemistry, earth science, and astronomy. These branches of natural science may be further divided into more specialized branches (also known as fields).

  8. Science education - Wikipedia

    en.wikipedia.org/wiki/Science_education

    Physics education is characterized by the study of science that deals with matter and energy, and their interactions. [11] Physics First, a program endorsed by the American Association of Physics Teachers, is a curriculum in which 9th grade students take an introductory physics course. The purpose is to enrich students' understanding of physics ...

  9. Deadheading (flowers) - Wikipedia

    en.wikipedia.org/wiki/Deadheading_(flowers)

    Deadheading is the horticultural practice of removing spent flowers from ornamental plants. Deadheading is a widespread form of pruning , [ 1 ] since fading flowers are not as appealing and direct a lot of energy into seed development if pollinated. [ 2 ]