Write about the seeds of the plant.

Write about the term "dopin". What are the pentavalent and trivalent impurity used in the process of doping? Give examples.

Write about the buoyancy force and viscous force.

Write about X-rays and how they are used as a dignostic tool in medicine.

Example briefly about the pH values of salts.

Write about the modification of roots.

Write about the application of a diode.

Write about weightlessness in space.

Write about the principle of conservation of energy in interference and diffraction.

The Class X students of a secondary school in Krishinagar have been allotted a rectangular plot of land for their gardening activity.Sapling of Gulmohar are planted on the boundary at a distance of 1 m from each other.There is a triangular grassy lawn in the plot as shown in the Fig.7.14.The students are to sow seeds of flowering plants on the plot. (i)Talking A as origin,find the coordinates of the vertices of the triangle