Medium Questions Questions

The liver is the largest internal organ in the human body, weighing approximately 1.5 kilograms (3.3 pounds) in adults. Located in the upper right abdomen, this vital organ performs over 500 essential functions, including detoxifying harmful substances, producing bile for digestion, storing vitamins and minerals, synthesizing proteins, and regulating blood sugar levels.

Ohm's Law relates voltage V, current I, and resistance R with the formula V = I cdot R. It states that the current passing through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature remains constant.

The process of a liquid turning into a gas is known as vaporization, which includes both evaporation and boiling. Evaporation happens only at the surface of the liquid and can occur at any temperature, while boiling happens throughout the entire liquid when it reaches its boiling point temperature.

The speed of light in a vacuum is approximately 299,792,458 meters per second (often rounded to 300,000 km/s or 186,000 miles per second. According to Einstein's theory of relativity, this is the universal speed limit; nothing with mass can travel faster than light. It is a fundamental constant of physics denoted by the letter 'c'.

Faults are fractures or cracks in the Earth's crust where significant movement has occurred. This movement is caused by the forces of plate tectonics. When the stress building up along a fault is suddenly released, it results in an earthquake.

The Outer Core is the layer of the Earth located between the mantle and the inner core. Unlike the solid inner core, the outer core is a liquid layer composed of molten iron and nickel. The movement of this liquid metal creates the Earth's magnetic field.

The Sun is composed mostly of the chemical elements Hydrogen (about 73% of its mass) and Helium (about 25%. The rest is made up of heavier elements like oxygen, carbon, and iron.

A prism disperses (splits) white light into its constituent colors-red, orange, yellow, green, blue, indigo, and violet. This happens because different colors of light travel at different speeds through the glass, causing them to refract (bend) at different angles.

A meteorite is a meteor that survives its passage through Earth's atmosphere and hits the surface. Before entering the atmosphere, it is called a meteoroid. While passing through the atmosphere, it becomes a meteor (or "shooting star") as friction with air molecules heats it to incandescence. If any part survives to reach the ground, it becomes a meteorite.

Yuri Gagarin was the first human in space, launched on April 12, 1961, aboard the Vostok 1 spacecraft. He completed one orbit of Earth in 108 minutes, reaching an altitude of 327 kilometers (203 miles). Gagarin became an international hero and was awarded the title Hero of the Soviet Union.

The electron was discovered by the British physicist J.J. Thomson in 1897 through his experiments with cathode ray tubes. He showed that cathode rays were composed of previously unknown negatively charged particles, which he initially called "corpuscles."

The Lithosphere is the rigid, outermost rocky layer of the Earth. It consists of the crust and the very top part of the mantle. This layer is broken into several large pieces called "tectonic plates" that move slowly over the more fluid layer below.

The boiling point of water is 373.15 Kelvin (which is equal to 100^circCelsius or 212^circFahrenheit. The Kelvin scale is the absolute temperature scale used by scientists; it starts at absolute zero 0 K and has the same unit size as the Celsius scale. You can convert Celsius to Kelvin simply by adding 273.15.

Carbon dioxide makes up about 96.5% of Venus's atmosphere, with nitrogen accounting for most of the remaining 3.5%. This extremely thick atmosphere, about 90 times denser than Earth's, creates a runaway greenhouse effect that makes Venus the hottest planet in the solar system. The atmosphere also contains clouds of sulfuric acid.

Vitamin K is essential for the process of blood clotting (coagulation). Without enough Vitamin K, the body cannot produce the proteins needed to stop bleeding after an injury. It is found in leafy green vegetables like spinach and kale.

Mercury (symbol Hg) is the only metal that is liquid at standard room temperature and pressure. It is also known as "quicksilver" due to its mobility and silver color. Because it has a high rate of thermal expansion that is constant over a wide range of temperatures, it was historically used in thermometers and barometers. However, mercury is highly toxic, and its use is being phased out in many applications.

A nebula is a giant cloud of dust and gas in space. Some nebulae are "stellar nurseries" where new stars are being born, while others are the remains of dying stars.

The Watt (symbol: W) is the SI unit of power, defined as one joule of energy per second. Power measures the rate at which work is done or energy is transferred. For example, a 100-watt light bulb converts 100 joules of electrical energy into light and heat every second. The unit was named in honor of James Watt, the Scottish engineer who greatly improved the steam engine.

The kidneys are the organs responsible for filtering the blood to remove waste products and excess water, which are then excreted as urine. They also help regulate blood pressure, maintain electrolyte balance, and produce hormones that stimulate red blood cell production.

Nitrous oxide N_2O is commonly known as "laughing gas" because it can cause euphoria and laughter when inhaled. It is used in dentistry and minor surgery as an anesthetic and analgesic.