Tag: science & technology

Dry ice is solid carbon dioxide (CO2) that sublimates directly from solid to gas at -78.5°C. It's called 'dry' because it doesn't melt into a liquid like regular ice does. The correct option has a typo.

While Xerox PARC invented the mouse concept in the 1970s, Apple was the first to commercially introduce it to the mass market with the Apple Lisa in 1983 and the Macintosh in 1984. This question likely refers to commercial introduction.

Ernest Rutherford discovered the proton in 1917-1919 through experiments showing that nitrogen could be converted into oxygen by alpha particle bombardment, identifying hydrogen nuclei as a fundamental particle. Option B misspelled.

Samuel F.B. Morse invented the telegraph and developed the Morse code system in the 1830s-1840s for transmitting messages electronically. Morse code uses combinations of dots and dashes to represent letters, numbers, and punctuation. It became crucial for long-distance communication, especially for maritime and telegraph communications. Richard Morse was Samuel's son who helped improve the system.

Alexander Graham Bell patented the first practical telephone in 1876. While others like Elisha Gray worked on similar technology, Bell's patent and successful demonstration earned him recognition as the inventor.

Robert Wilhelm Bunsen developed the Bunsen burner around 1855 with his laboratory assistant Peter Desaga. The burner's design produces a clean, hot flame essential for laboratory chemistry work.

Anders Celsius, a Swedish astronomer, proposed the Celsius temperature scale in 1742. His original scale had 0° as boiling point and 100° as freezing point, which was later reversed to the modern version.

Sir Humphry Davy created the first electric incandescent light in 1800 using a battery and platinum filament. Edison later improved the technology with a practical carbon filament bulb in 1879.

Wilhelm Conrad Röntgen discovered X-rays in 1895 while experimenting with cathode ray tubes. He received the first Nobel Prize in Physics in 1901 for this groundbreaking discovery.

Nikola Tesla pioneered wireless communication technology in the 1890s, demonstrating radio control and wireless transmission of electromagnetic energy. He holds the foundational patent for radio technology.