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Classically, electromagnetic radiation consists of electromagnetic waves, which are synchronized oscillations of electric and magnetic fields that propagate at the speed of light through a vacuum.

The humerus is the long bone in the upper arm. It is located between the elbow joint and the shoulder.

Carrot is a Root Vegetable.

Another word for rust is ‘iron oxide’. An oxide is a compound that contains a metal or a non-metal combined with oxygen. Oxidisation is the chemical process of combining a substance with oxygen. When iron comes into contact with the oxygen in the water, a chemical reaction occurs to make a new compound.

Potential energy is energy stored in an object due to its position or arrangement. Kinetic energy is energy of an object due to its movement – its motion.

Penicillin is a secondary metabolite of certain species of Penicillium and is produced when growth of the fungus is inhibited by stress. It is not produced during active growth. Production is also limited by feedback in the synthesis pathway of penicillin.

Human muscles contain 75% of water.

Every cell in the human body contains protein. The basic structure of protein is a chain of amino acids. You need protein in your diet to help your body repair cells and make new ones.

An endoscope is an instrument used by doctors, has a bundle of optical fibres which are used with lenses to see inside the patient’s body. Endoscopes work on total internal reflection phenomenon.

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