Tag: science & technology

Isotopes are atoms of the same element with identical atomic numbers (same protons) but different mass numbers (different neutrons). This variation in neutrons changes atomic mass while preserving chemical identity.

C.V. Raman received the Nobel Prize in Physics in 1930 for discovering the Raman effect - the inelastic scattering of photons by molecules. This phenomenon (Raman scattering) became a fundamental tool in molecular spectroscopy.

The Mach number represents the ratio of an object's speed to the speed of sound in the surrounding medium. It is primarily used to characterize aircraft velocities, classifying flight regimes from subsonic (M<1) to supersonic (M>1).

The ozone layer in the stratosphere contains high concentrations of ozone (O3) molecules that absorb harmful UV-B and UV-C radiation from the sun, protecting life on Earth. The infrared, greenhouse, and ultraviolet layers are not actual atmospheric layers.

Venus is the hottest planet with surface temperatures around 465°C due to its thick atmosphere creating an extreme greenhouse effect. Although Mercury is closest to the sun, its lack of atmosphere means it can't trap heat like Venus does.

Firefox, Opera, Chrome, Safari, and Internet Explorer are all software applications used to access and navigate the World Wide Web, known as web browsers. They are not games, websites themselves, or search engines (though they can access search engines).

The Earth's core reaches temperatures of approximately 6,000°C, while the Sun's surface is about 5,500°C. The Moon's surface ranges from -173°C to 127°C, and Earth's surface averages 15°C. The center is hotter due to intense pressure and radioactive decay.

France gifted the Statue of Liberty to the United States in 1886 to commemorate the alliance between the two nations during the American Revolution and to celebrate the centennial of American independence. It was designed by French sculptor Frédéric Auguste Bartholdi.

A solar eclipse occurs when the Moon passes between the Sun and Earth, casting a shadow on Earth's surface. A lunar eclipse happens when Earth is between the Sun and Moon. 'Partial eclipse' is too general and 'All of the above' is incorrect.

Hydrogen (atomic number 1) is the first and lightest element on the periodic table, with one proton and one electron. Oxygen, carbon, and helium all have higher atomic numbers (8, 6, and 2 respectively).