Tag: science & technology

Titan is Saturn's largest moon and the second-largest natural satellite in our solar system. It is larger than the planet Mercury and has a thick atmosphere. The other options are moons of Uranus or astronomers' names.

Voyager 1 launched on September 5, 1977 and is currently the most distant human-made object from Earth. Though Voyager 2 launched 16 days earlier, Voyager 1 became the first to reach Jupiter and Saturn. The Cassini-Huygens mission was a later Saturn-focused project.

The stapes (misspelled as 'Stepis') is the smallest bone in the human body, located in the middle ear. It's approximately 3mm × 2.5mm. The other ear bones are malleus (misspelled as 'Melius') and incus. 'Feemar' appears to be a misspelling of 'Malleus'. Note that the options contain spelling errors, but the intended answer is correct.

The liver is the largest internal organ and largest gland in the human body, weighing approximately 1.4-1.6 kg in adults. It performs vital functions including detoxification, protein synthesis, and bile production. The brain, while heavy, is not classified as a gland. Kidneys, eyes, and stomach are smaller than the liver.

Howrah Bridge (now Rabindra Setu) is a cantilever bridge that spans the Hooghly River in Kolkata. When commissioned, it was the third-longest cantilever bridge in the world and remains the largest cantilever bridge in India. Bally Bridge (Vidyasagar Setu) is a cable-stayed bridge, not a cantilever bridge.

India has the largest population of vegetarians globally, with estimates ranging from 20-40% of its population being vegetarian due to cultural, religious, and ethical reasons. Hinduism, Buddhism, and Jainism promote vegetarianism, making India the country with the highest number of vegetarians by far.

VY Canis Majoris is one of the largest known stars by radius and volume. This red hypergiant star in the constellation Canis Major has an estimated radius approximately 1,420 times that of the Sun. The Abell designations (Abell 2029, Abell 2049) refer to galaxy clusters, not individual stars. VY Canis Minor is not recognized as a major star designation.

Fruit flies (Drosophila melanogaster) were the first animals intentionally sent into space. On February 20, 1947, the United States launched fruit flies aboard a V-2 rocket to study the effects of radiation exposure at high altitudes. They were recovered alive. Monkeys, rats, and dogs (not birds) were sent later - Laika (dog) in 1957, and Albert II (monkey) in 1949.

Black holes are described by Einstein's theory of general relativity, specifically the Schwarzschild and Kerr metrics derived from Einstein's field equations. Option B correctly identifies this, though the note about physics breaking at the singularity is an important nuance. Special relativity (C) doesn't account for gravity, while Pascal's Law (A) and Brownian motion (D) are unrelated to black hole physics.

Swine flu (H1N1) primarily infects pigs, which is why it's called 'swine' flu. The virus originated in pig populations and can spread from pigs to humans. While humans can transmit it to each other, pigs remain the natural reservoir host. Note: 'Buffalow' in option D is misspelled (should be 'Buffalo').