Science and Technology Inventions

ADA stands for Aeronautical Development Agency, which is India's nodal agency for the development of Light Combat Aircraft (LCA) Tejas. It is under DRDO.

EADS (European Aeronautic Defence and Space Company), now known as Airbus Group, took control of Airbus. Airbus was originally a consortium of European aerospace companies.

The Cauvery engine (GTX-35VS Kaveri) is being developed by GTRE (Gas Turbine Research Establishment) primarily to power India's LCA Tejas fighter aircraft. It is not for A400M, SARAS, or IJT.

Christopher Latham Sholes invented the first practical typewriter in the 1860s. Shockley worked on transistors, Pascal on calculating machines, and Waterman on fountain pens.

Charles Babbage designed the Analytical Engine in the 1830s, considered the first general-purpose computer concept. Edison worked on electricity and lighting, not computers.

Blaise Pascal invented the Pascaline in 1642, an early mechanical calculator. This predates modern computers by centuries.

Laszlo Biro patented the ballpoint pen in 1938. Waterman founded a fountain pen company but didn't invent ballpoint pens.

The Celsius and Fahrenheit scales intersect at exactly -40 degrees. -40°C = -40°F. This is the only temperature where both scales give the same reading.

Earthquake intensity is measured with a seismograph (not listed). Thermometers measure temperature, barometers measure air pressure, hydrometers measure liquid density. So 'None' is correct.