Write any three uses of artificial satellites.

Write any two uses of yeast.

Write any two uses of boron.

Give any three uses of copper.

What are semiconductors' Explain the principle of working of solar cells made of semiconductor. Why are solar panel cells used in artificial satellites?

Write any two uses of aluminium.

What is the orbiting speed of an artificial satellite close to the surface of the Earth .

Write three uses of cyclotron.