This “sphere” covers 70% of the earth what am i

Identify the electromagnets with poles that are reversed from the electromagnet shown above

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.

The same side of the moon always faces earth because the