Everyday Science

A washing machine works on the principle of centrifugation, where rapid spinning removes water from clothes by using centrifugal force.

Vitamin B-6 is known as Pyridoxine. It plays an important role in metabolism and brain function, distinguishing it from other B vitamins such as B-1 (Thiamine), B-2 (Riboflavin), and B-12 (Cobalamin).

The standard unit for measuring home electricity consumption is the kilowatt-hour (kWh), which represents the energy used when one kilowatt of power is consumed for one hour. This unit is commonly used by electricity meters and billing systems.

A hypsometer is an instrument used to measure height or altitude above sea level by determining the boiling point of water, which changes with atmospheric pressure. The other options measure different parameters: a hygrometer measures humidity, a pyrometer measures high temperatures, and a solometer is not a standard instrument.

The second largest component in milk after water is protein. Fat is the third largest component. Vitamins are present in very small amounts, and 'None of these' is incorrect.

The thickness of the ozone layer is measured in Dobson Units, which quantify the total amount of ozone in a column of the atmosphere.

Retinol is the chemical name for Vitamin A, which is essential for vision, growth, and immune function. The other options correspond to different vitamins with distinct chemical names.

Venus and Uranus are the two planets in our solar system that rotate from east to west, also called retrograde rotation, unlike most other planets which rotate from west to east.

Hydrogen is the most abundant element in the human body by number of atoms, primarily because water (H2O) makes up a large portion of the body and contains hydrogen atoms. Oxygen is abundant by mass but not by atom count. Blood and protein are not elements.

Earth is commonly called the Blue Planet because of its abundant water bodies that appear blue from space.