The condition of earths atmosphere at a given time and place is the weather.
Center.........................
Answer:

Explanation:
As we know by radioactivity law

so here we will have


now we will have


now we also know that



Concrete is not a polymer which Nylon, and Kevlar are
Answer:
Without it, we could not survive on Earth. Earth orbits the sun due to the gravity of the sun, which maintains us at a convenient distance from it to enjoy the sun's warmth and light. It keeps the air we need to breathe and our atmosphere in place. Our planet is held together by gravity.