50 to 53 which chapter question answer please
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ans 50
The respiratory system is the network of organs and tissues that help you breathe. It includes your airways, lungs, and blood vessels. The muscles that power your lungs are also part of the respiratory system. These parts work together to move oxygen throughout the body and clean out waste gases like carbon dioxide
ans 51
Visible light, also known as white light, consists of a collection of component colors. ... Upon passage through the prism, the white light is separated into its component colors - red, orange, yellow, green, blue and violet. The separation of visible light into its different colors is known as dispersion
ans 52
When an electric current flow through a solenoid,magnetic field is set up around solenoid similar to that of a bar magnet. One end of a solenoid act as a north pole and other as south pole. Magnetic field is represented by straight magnetic field lines parallel and very close to each other.
ans 53
Besides, another important aspect of domestic electric circuit is earthing. The earthing wire is connected with the metal plate and dumped deep near the house. In a domestic electric circuit, red coloured wire is used as live wire, black coloured wire as neutral wire and green coloured wire as earthing.
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