Mercury is the only metal that remains liquid at room temperature (25°C). Its melting point is -38.8°C.

The speed of light in vacuum is approximately 3 × 10⁸ m/s or 299,792,458 m/s to be precise.

Vitamin D helps in the absorption of calcium from the intestines, essential for bone health and development.

Sublimation is the process where a solid directly converts to a gas. Dry ice (solid CO₂) is a common example.

O- blood type is the universal donor as it lacks A, B, and Rh antigens on red blood cells.

Sulfuric acid is H₂SO₄, one of the most important industrial chemicals with numerous applications.

Newton's Third Law states that for every action, there is an equal and opposite reaction.

The pancreas produces insulin, a hormone that regulates blood glucose levels. The beta cells in the pancreas secrete this hormone.

Solar energy is renewable as the sun's energy is continuously available. Coal, petroleum, and natural gas are non-renewable fossil fuels.

AB blood group is the universal recipient because it has both A and B antigens, allowing it to receive blood from all groups.