burn-out indicator
41space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… …
42Delta-v — For other uses, see Delta v (disambiguation). In astrodynamics a Δv or delta v (literally change in velocity ) is a scalar which takes units of speed. It is a measure of the amount of effort that is needed to change from one trajectory to another …
43Turkish Airlines Flight 981 — CG render of TC JAV moments after failure of the cargo hatch. Accident summary Date 3 March 1974 …
44TXE — TXE, which stands for Telephone eXchange Electronic, was the designation given to a family of telephone exchanges developed by the British General Post Office (GPO), now BT, designed to replace the ageing Strowger systems. When World War II ended …
45steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
46THE MIDDLE AGES — …
47Pit stop — For the technique to cause a car to spin around (and stop) quickly, see PIT maneuver. For other uses, see Pitstop. Indianapolis Motor Speedway Formula 1 pit lane and garages (right) adjacent to the oval racing lane …
48Laser safety — A typical laser warning symbol. Laser safety is safe design, use and implementation of lasers to minimize the risk of laser accidents, especially those involving eye injuries. Since even relatively small amounts of laser light can lead to… …
49TARDIS — The TARDIS used from 2005 to 2010 on display at BBC Television Centre …
50Havok (comics) — Superherobox caption=Havok from the cover of X Men: Emperor Vulcan #1. comic color=background:#ff8080 character name=Havok real name=Alexander Alex Summers species=Human Mutant publisher=Marvel Comics debut= Uncanny X Men #54 (March, 1969)… …
