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  2. Twin-lead - Wikipedia

    en.wikipedia.org/wiki/Twin-lead

    Ladder line is an older, simpler form of parallel-wire line, often called open wire line. The configuration looks like a rope ladder , hence the name. It can either be purchased already made by a cable company, or home-made ; the construction is easy, though tedious, and originally all radio amateurs made their own open wire line.

  3. Attic ladder - Wikipedia

    en.wikipedia.org/wiki/Attic_ladder

    An attic ladder (US) or loft ladder (UK) is a retractable ladder that is installed into an attic door/access panel. They are used as an inexpensive and compact alternative to having a stairway that ascends to the attic of a building. They are useful in areas with space constraints that would hinder the installation of a standard staircase.

  4. Psychrometrics - Wikipedia

    en.wikipedia.org/wiki/Psychrometrics

    The underlying psychrometric parameter data for the psychrometric chart and the Mollier diagram are identical. At first glance there is little resemblance between the charts, but if the chart is rotated by ninety degrees and looked at in a mirror the resemblance becomes apparent. The Mollier diagram coordinates are enthalpy and humidity ratio.

  5. Moisture sorption isotherm - Wikipedia

    en.wikipedia.org/wiki/Moisture_sorption_isotherm

    Moisture sorption isotherm. The relationship between water content and equilibrium relative humidity of a material can be displayed graphically by a curve, the so-called moisture sorption isotherm. For each humidity value, a sorption isotherm indicates the corresponding water content value at a given temperature. If the composition or quality ...

  6. 18 Secrets To Turning Your Home Into A Winter Fortress - AOL

    www.aol.com/jack-frost-cold-shoulder-18...

    Buy Now: amazon.com #3 Clean The Gutters. Clogged gutters can cause water to back up and potentially damage your home's foundation, walls, and roof. Cleaning the gutters is a crucial task to ...

  7. Enthalpy–entropy chart - Wikipedia

    en.wikipedia.org/wiki/Enthalpy–entropy_chart

    A horizontal line in the diagram represents an isenthalpic process. A vertical line in the h–s chart represents an isentropic process. The process 3–4 in a Rankine cycle is isentropic when the steam turbine is said to be an ideal one. So the expansion process in a turbine can be easily calculated using the h–s chart when the process is ...

  8. Antenna feed - Wikipedia

    en.wikipedia.org/wiki/Antenna_feed

    The most widely used types of feed line are coaxial cable, twin-lead, ladder line, and at microwave frequencies, waveguide. Particularly with a transmitting antenna, the feed line is a critical component that must be adjusted to work correctly with the antenna and transmitter. Each type of transmission line has a specific characteristic impedance.

  9. Thermodynamic diagrams - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_diagrams

    This Process Path is a straight horizontal line from state one to state two on a P-V diagram. Figure 2. It is often valuable to calculate the work done in a process. The work done in a process is the area beneath the process path on a P-V diagram. Figure 2 If the process is isobaric, then the work done on the piston is easily calculated.