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2. Photovoltaic system - Wikipedia

   en.wikipedia.org/wiki/Photovoltaic_system

   A photovoltaic system, also called a PV system or solar power system, is an electric power system designed to supply usable solar power by means of photovoltaics.It consists of an arrangement of several components, including solar panels to absorb and convert sunlight into electricity, a solar inverter to convert the output from direct to alternating current, as well as mounting, cabling, and ...

3. Compact fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Compact_fluorescent_lamp

   The luminous efficacy of lamps is the number of lumens emitted for each watt of electric power used. The luminous efficacy of a typical CFL is 50–70 lumens per watt (lm/W) and that of a typical incandescent lamp is 10–17 lm/W. [38]

4. Transformer - Wikipedia

   en.wikipedia.org/wiki/Transformer

   In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits.A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core.

5. BMW 5 Series (E60) - Wikipedia

   en.wikipedia.org/wiki/BMW_5_Series_(E60)

   The development programme for the E60 began in 1997, concluding in 2002. The lead designer was Boyke Boyer. [1] The final design, developed by Davide Arcangeli [2] under BMW Design Director Chris Bangle, [3] [4] was approved in 2000 and German design patents filed on 16 April 2002.

6. BMW 5 Series (E39) - Wikipedia

   en.wikipedia.org/wiki/BMW_5_Series_(E39)

   In 2001, the American market 540i's power output was increased to 216 kW (290 hp), [65]: 12 [73] unlike other markets where the 540i's power remained at 210 kW (282 hp). [74] All North American models from factory arrived pre-wired for mobile phones; it was a dealer option to have a mobile phone installed into the centre console.

7. Gulfstream V - Wikipedia

   en.wikipedia.org/wiki/Gulfstream_V

   The Gulfstream V (Model GV, pronounced "G-five") is a large, long-range business jet aircraft produced by Gulfstream Aerospace, derived from the previous Gulfstream IV.It flies up to Mach 0.885 (508 kn; 940 km/h), up to 51,000 feet (16,000 m) and has a 6,500 nmi (12,000 km) range.

8. List of most luminous stars - Wikipedia

   en.wikipedia.org/wiki/List_of_most_luminous_stars

   Note that even the most luminous stars are much less luminous than the more luminous persistent extragalactic objects, such as quasars. For example, 3C 273 has an average apparent magnitude of 12.8 (when observing with a telescope), but an absolute magnitude of −26.7.

9. Shirley Jones - Wikipedia

   en.wikipedia.org/wiki/Shirley_Jones

   During its first season, it became a hit and was screened in over 70 countries. Within months, Jones and her co-stars were pop culture television icons. [12] Her real-life 20-year-old stepson David Cassidy, who was an unknown actor at the time, played Shirley Partridge's eldest son Keith and became a teen idol. The show also spawned a number of ...