Tag: science & technology

Trishul missile used a single-stage solid composite propellant system, typical for short-range surface-to-air missiles requiring quick response. Solid propellants provide instant thrust and are ideal for point defense systems.

Shaurya missile uses a two-stage solid propellant system, providing high thrust for its hypersonic trajectory. The solid propulsion enables rapid acceleration and is suitable for its tactical ballistic missile role.

Prithvi II uses a single-stage liquid propulsion system, an evolution from Prithvi I with improved range and payload. The liquid fuel system provides the necessary thrust and control for extended-range tactical operations.

Prithvi III, also known as Dhanush, uses a two-stage system with solid propellant in the first stage for initial boost and liquid propellant in the second for precise guidance. This hybrid system combines solid thrust power with liquid control.

The Bang Na Expressway bridge in Thailand is the longest bridge in the world by total length at 54 kilometers (33.5 miles). It's a six-lane elevated highway. The Lake Pontchartrain Causeway in Louisiana is often cited as the longest continuous bridge over water at 38.4 km. Manchac Swamp bridge is also in Louisiana, and Third Mainland Bridge is in Nigeria - neither is the longest.

Burj Dubai (now renamed Burj Khalifa) in Dubai, UAE, is the tallest tower in the world at 828 meters (2,717 feet). It surpassed previous record holders including the Petronas Twin Towers (452m) in Kuala Lumpur and the Willis Tower (formerly Sears Tower, 442m) in Chicago. Tokyo Tower (333m) is a communications tower inspired by the Eiffel Tower.

Mount Everest's official height is 8,848 meters (29,029 feet) above sea level. This was established by the Survey of India in 1954 and remained the accepted elevation for decades. Options A and D have incorrect heights, and option C incorrectly lists 29,029 as meters when that's actually the height in feet. Note there's a minor typo in option B ('above above' repeated).

The Eiffel Tower's height is approximately 324 meters, which converts to roughly 1063 feet. This height can vary slightly with temperature due to thermal expansion.

Construction of the Taj Mahal complex began around 1632 and was completed in its entirety by 1653. While the main mausoleum was finished earlier, the whole project spanned these two decades.