Tag: science & technology

WAV stands for Waveform Audio Format, which is an audio file format standard developed by Microsoft and IBM for storing uncompressed audio bitstream. The term Waveform refers to the representation of sound as wave patterns. Format is the correct term describing the file structure.

Willis Carrier invented modern air conditioning in 1902. His invention was initially designed to control humidity in a printing plant, but it revolutionized how we live and work by making indoor spaces comfortable in hot weather. The other options are associated with different inventions: Mary Phelps Jacob (brassiere), Douglas Engelbart (computer mouse), Alan Shugart (floppy disk drive).

Ladislao (László) Bíró invented the ballpoint pen in the 1930s. He was a Hungarian journalist who Frustrated with fountain pens, he developed a pen with a rolling ball that distributed ink evenly. The name 'Biro' is still used as a generic term for ballpoint pens in many countries. Thomas Edison invented the light bulb and phonograph, not the ballpoint pen.

Douglas Engelbart invented the computer mouse in 1964 at the Stanford Research Institute. His invention was part of his pioneering work on human-computer interaction. The mouse revolutionized how people interact with computers. Willis Carrier invented air conditioning, Richard M. Hollingshead created the drive-in theater, and Alan Shugart developed the floppy disk drive.

Thomas Edison is credited with inventing the electric chair as a method of execution. He developed it in the 1880s as part of the 'War of Currents' to demonstrate that AC electricity (promoted by Tesla/Westinghouse) was more dangerous than DC. The first execution using the electric chair was in 1890 in New York. Edison's involvement is a controversial but historical fact.

Jack Kilby invented the integrated circuit (microchip) at Texas Instruments in 1958. His invention revolutionized electronics by allowing multiple transistors to be fabricated on a single semiconductor chip. Robert Noyce independently developed a similar integrated circuit at Fairchild Semiconductor shortly after. Both are credited as co-inventors. This invention earned Kilby the Nobel Prize in Physics in 2000.

Uranus and Neptune are both classified as ice giants in our solar system. Uranus is called an ice giant because its atmosphere contains water, ammonia, and methane ices. Jupiter and Saturn are gas giants, and Earth is a rocky planet.

Aryabhatta was India's first satellite, launched on April 19, 1975. IRS-1A was India's first remote sensing satellite launched much later in 1988. Bhaskar and Rohini were subsequent satellites. Aryabhatta marked the beginning of India's space program.

Taxila (Takshashila) is widely considered the world's first university, dating back to around 600 BCE in ancient India. Nalanda was a later but more famous university (427-1197 CE). Vikramashila was also established later. Oxford is a medieval European university from the 12th century, much later than Taxila.

Alexander Fleming discovered penicillin in 1928, the first antibiotic. The other options are inventors of other things (electric heating, diesel engine, steam vehicle).