Tag: science & technology

Durba Banerjee was India's first woman commercial pilot, flying for Indian Airlines starting in 1966. She broke gender barriers in Indian aviation. Kamini Roy was a poet and women's rights activist. Asima Chatterjee was a renowned chemist. Anna Chandy (or Chandi) was India's first woman judge, not a pilot.

Mumbai's suburban railway network, established in 1853, was the first in India. The service connected Bombay (now Mumbai) to Thane, marking the beginning of railway suburban services in the country.

Dennis Ritchie created the C programming language at Bell Labs in the early 1970s. George Stephenson invented the steam locomotive, James Watt improved the steam engine, and James Naismith invented basketball.

James Gosling created Java at Sun Microsystems in the mid-1990s. Brendan Eich created JavaScript, and the other names are not programming language creators.

Rasmus Lerdorf created PHP in 1994. Tim Berners-Lee invented the World Wide Web, and the other names are not associated with programming language creation.

Larry Ellison co-founded Oracle Corporation (originally called Software Development Laboratories) in 1977 and is widely credited as the driving force behind Oracle Database. The other options are incorrect - Nathan B. Stubblefield invented wireless telephony, Martin Cooper invented the mobile phone, and Murray Kentucky is a place name not a person.

Edmund F. Codd invented the relational model for database management while working at IBM in 1970, which became the foundation for all RDBMS systems. His groundbreaking paper 'A Relational Model of Data for Large Shared Data Banks' revolutionized database technology. The distractors are incorrect - Layman worked on XML, Berners-Lee invented the World Wide Web, and Parino is not a known figure in database history.

The average distance from the Earth to the Sun is approximately 93 million miles (about 150 million kilometers). This distance is defined as one Astronomical Unit (AU) and varies slightly throughout the year due to Earth's elliptical orbit, ranging from about 91.4 million miles at perihelion (closest) to 94.5 million miles at aphelion (farthest). The average of approximately 93 million miles is the standard answer.

The Sun contains approximately 99.8% of the total mass of the entire Solar System. This is because the Sun's mass is about 1.989 × 10^30 kg, while all the planets, asteroids, comets, and other objects combined make up only about 0.2% of the Solar System's mass. Jupiter, the largest planet, itself contains about 71% of all planetary mass, but even Jupiter is tiny compared to the Sun.

Hydrogen is the most abundant element in the Sun, making up approximately 74% of its mass (about 92% by number of atoms). The Sun's composition is primarily hydrogen (74% by mass, 92% by count), with helium (24% by mass, 8% by count) as the second most abundant element. The remaining 2% consists of heavier elements like oxygen, carbon, neon, and iron.