| airship flagship lightship |
Airship: It is a self-propelled lighter-than-air aircraft with the means of controlling the direction of the flight.
Flagship: It is a ship carrying the flag officer or the commander of a fleet, or squadron. It displays the officer’s flag.
Lightship: It refers to a ship anchored in a specific location flashing a very bright light for the guidance of ships to avoid dangerous areas.
| take on sth: | to begin to have a particular quality or appearance; to assume sth |
| take sb on: | to employ sb; to engage sb to accept sb as one’s opponent in a game, contest or conflict |
| take sb/sth on: | to decide to do sth; to allow sth/sb to enter e.g. a bus, plane or ship; to take sth/sb on board |
Draw the Lewis structures for the following molecules and ions: \(H_2S\), \(SiCl_4\), \(BeF_2\), \(CO_3^{2-}\) , \(HCOOH\)
| λ (nm) | 500 | 450 | 400 |
|---|---|---|---|
| v × 10–5(cm s–1) | 2.55 | 4.35 | 5.35 |