Answer:
Solar panel
Explanation:
You can often find solar panels on top of rooftops of buildings or apartments (usually in less developed countries), as because it consumes the light energy from sunlight and converts it into electrical energy which can be later used to run electrical energy in that specific building.
Answer:
We live on earth because we are not floating in the sky.
Explanation:
Because earth may be in the sky but we are not technically we are in the sky on earth not in the sky that's incorrect.
Answer : Option B) Perfect Circles
Explanation : In heliocentric model where sun is considered to be the center and earth and other planets revolves around it. The shape of the objects in the space is perfectly circle as they move around the sun.
As we know that gravitational force of Sun will provide the centripetal force to all planets
so here we will have
here we know that
now from above equation
