Science & Technology Basics

The human body continuously regenerates, with about 300 billion cells dying daily. This averages to roughly 300 million cells per minute. Most of these are blood cells, skin cells, and other short-lived cells that are constantly replaced through cell division.

Babies are born with approximately 270-300 bones, but many fuse together during growth. Adults have 206 bones because separate bones at birth (like skull plates and vertebrae) merge into single bones. This fusion is a normal part of skeletal development.

This is a documented physiological phenomenon called 'angel lust' or 'terminal erection.' It can occur after death, particularly in hangings and certain causes of death, due to gravity affecting blood circulation and the mechanics of penile tissue. The blood doesn't always drain immediately.

The human heart can generate significant pressure during strong contractions. The commonly cited trivia fact is that this pressure could theoretically squirt blood up to 30 feet if unobstructed. This is more of a theoretical maximum demonstrating the heart's power rather than a regularly observed phenomenon.

Alien hand syndrome is a real neurological condition where a person's hand moves involuntarily, often performing complex actions without the person's intention. This makes the statement True.

The statement is false on both counts. Humans can survive without food for weeks (depending on body reserves), but sleep deprivation can be fatal much faster - within 11 days to two weeks for extreme cases. Therefore you cannot survive without sleep.

N95 respirators are the standard masks used to prevent the spread of H1N1 influenza virus. The '95' indicates they filter 95% of airborne particles. Options like 'N007', 'W585i', and 'SN59' are not real mask designations and appear to be garbled text.

Olympus Mons on Mars is the tallest mountain in the solar system at about 21.9 km (72,000 ft), nearly 3x higher than Mount Everest. The question is poorly phrased but the intended meaning is clear.

James Watt (1736-1819) was the Scottish inventor who significantly improved the steam engine's efficiency in the late 1700s, making it practical for industrial use. While earlier steam engines existed (Newcomen), Watt's innovations were transformative.

The 1's complement of a binary number is obtained by flipping all bits - changing 0s to 1s and 1s to 0s. For 101100, flipping gives 010011. This operation is commonly used in computer arithmetic for representing negative numbers in signed binary formats.

PARAM, developed by the Centre for Development of Advanced Computing (C-DAC) in 1991, was India's first indigenously built supercomputer. It was developed in response to technology denial regimes and marked India's entry into high-performance computing. PARAM means 'supreme' in Sanskrit.

The Intel 4004, released in 1971, was a 4-bit processor and the first commercially available microprocessor. It contained 2,300 transistors and could execute 92,000 instructions per second. The '4004' designation reflects its 4-bit architecture.

Dry ice (solid carbon dioxide) was first observed by French chemist Charles Thilorier in 1825 when he opened a pressurized container of liquid carbon dioxide and noticed the solid formation. This discovery was significant for understanding CO2's properties. 1734 is too early, 1892 and 1906 are much later dates.

Both aspirin and heroin were synthesized by chemist Felix Hoffmann at Bayer in 1897, with aspirin developed in August 1897 and heroin following in November/December 1897 - only about 11 days apart in terms of their development timeline. This is one of chemistry's most fascinating coincidences. Neither was created by a hairdresser, dentist, nor Thomas Edison.

Boric acid in dilute solution is used as an eyewash and mild antiseptic for eye irritations, particularly conjunctivitis. It's beneficial for soothing minor eye infections and inflammation. Ascorbic acid (vitamin C) is for immunity, citric acid is in citrus fruits, and acetic acid is vinegar - none are used directly in eyes.

Norman Lockyer named helium after Helios, the Greek sun god, because helium was first detected in the solar spectrum (1868) during a solar eclipse before being found on Earth (1895). Lockyer recognized it as a new element unique to the sun at the time. The story about a dog, cat, or wife is纯属 fictional.

Earth's escape velocity is approximately 7 miles per second (about 11.2 km/s or 25,000 mph). This is the minimum speed a rocket must achieve to break free from Earth's gravitational pull without further propulsion. 14, 20, and 25 miles per second all exceed the actual escape velocity, which is around 7 mps.