Govt. Exams
Entrance Exams
The speed of light in vacuum is approximately 3 × 10^8 meters per second or 300,000 km/s.
Diamond is the hardest naturally occurring substance, rating 10 on the Mohs hardness scale.
Coal is a fossil fuel and non-renewable energy source. Solar, wind, and hydroelectric are renewable sources.
Water boils at 100°C (212°F) at standard atmospheric pressure of 1 atm or 101.325 kPa.
Carbon has atomic number 6, meaning it has 6 protons in its nucleus. It is the basis of all organic compounds.
Vitamin D is synthesized in the skin upon exposure to ultraviolet (UV) radiation from sunlight.
Table salt is sodium chloride (NaCl), composed of sodium and chlorine ions in a 1:1 ratio.
Carbon dioxide (CO₂) is the primary greenhouse gas responsible for global warming. It traps heat in the atmosphere.
The standard acceleration due to gravity at Earth's surface is approximately 9.8 m/s² or 10 m/s² for approximations.
Kidneys filter waste products from the blood to produce urine. Each person typically has two kidneys.
