2) The altitude above mean sea level. This is important for long range precision shooting because the air density changes with elevation and affects the path of the bullet. Extractor* A device that withdraws or elevates a fired shell casing or a live round from the chamber as the breech mechanism is opened.
The rebec (sometimes rebecha, rebeckha, and other spellings, pronounced /ËriËbÉk/ or /ËrÉbÉk/) is a bowed stringed instrument of the Medieval era and Renaissance era. In its most common form, it has a narrow boat-shaped body and 1-5 strings.he instrument was used by dance masters until the 18th century, however, often being used for the same purpose as the kit, a small pocket-sized violin. The rebec also remained in use in folk music, especially in eastern Europe and Spain. Andalusi nubah, a genre of music from North Africa, often includes the rebec.
The melodica, also known as the pianica, blow-organ, key-flute or key-ute, is a free-reed instrument similar to the melodion and harmonica. It has a musical keyboard on top, and is played by blowing air through a mouthpiece that fits into a hole in the side of the instrument. Pressing a key opens a hole, allowing air to flow through a reed. The keyboard is usually two or three octaves long. Melodicas are small, light, and portable.