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Think about washing dirty dishes or clothing. There will be lots of tiny little holes and cracks that water needs to get into to wash away dirt and grime, such as the spaces between the fibres of a shirt or between a plate and bits of dried food. In order for water to flow more easily into these small spaces, you need to decrease its surface tension. You can do this by adding soap, which is a surfactant (a material that decreases the surface tension of a liquid). In this activity, you will see how soap decreases the surface tension of water by putting water droplets on top of a penny.

The nucleus of an atom is held together by the strong nuclear force that binds together protons and neutrons. Although the strong nuclear force is the strongest of the four fundamental forces, it acts only over very short – typically nuclear – distances.

Through series of experiments, they concluded that DNA is the genetic material present in nucleus of cell.
Human DNA contains 3 million deoxyribonucleotide residues and contain 25000 genes.
Genes are stretch of DNA that carries codes of protein production.

Glycogen is a multibranched polysaccharide of glucose that serves as a form of energy storage in humans, animals, fungi, and bacteria.
It is a large multi-branched polymer of glucose which is accumulated in response to insulin and broken down into glucose in response to glucagon.
Glycogen is mainly stored in the liver and the muscles and provides the body with a readily available source of energy if blood glucose levels decrease.

A mirage is a naturally occurring optical phenomenon in which light rays bend to produce a displaced image of distant objects or the sky. The word comes to English via the French mirage, from the Latin mirari, meaning “to look at, to wonder at”. This is the same root as for “mirror” and “to admire”.
Mirages can be categorized as “inferior” (meaning lower), “superior” (meaning higher) and “Fata Morgana”, one kind of superior mirage consisting of a series of unusually elaborate, vertically stacked images, which form one rapidly changing mirage.

In contrast to a hallucination, a mirage is a real optical phenomenon that can be captured on camera, since light rays are actually refracted to form the false image at the observer’s location. What the image appears to represent, however, is determined by the interpretive faculties of the human mind. For example, inferior images on land are very easily mistaken for the reflections from a small body of water.

Hypercalcemia is a condition in which the calcium level in your blood is above normal. Too much calcium in your blood can weaken your bones, create kidney stones, and interfere with how your heart and brain work. Hypercalcemia is usually a result of overactive parathyroid glands.

Single-cell proteins (SCP) refers to edible unicellular microorganisms.
he biomass or protein extract from pure or mixed cultures of algae, yeasts, fungi or bacteria may be used as an ingredient or a substitute for protein-rich foods, and is suitable for human consumption or as animal feeds.
Single-cell protein is a generic term for crude or refined protein whose origin is bacteria, yeasts, molds, or algae, microorganisms that usually contain above 40% of crude protein on dry weight bases.

Corpuscular theory of Light was proposed by- Issac Newton.
Wave theory of light was proposed by- Christian Huygens.
The scientist who discovered that sunlight consists of 7 colours- Issac Newton.
The principle of three primary colours was proposed by- Thomas Young.
The scientist who discovered that constituent colours join together to form composite light-Issac Newton.
The scientist who proved that light is an electromagnetic wave- Henrich Hertz.

The hypoglossal nerve is the twelfth cranial nerve, and innervates all the extrinsic and intrinsic muscles of the tongue, except for the palatoglossus which is innervated by the vagus nerve. It is a nerve with a solely motor function.

Phosphorus is a chemical element with symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth.

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