What is electronic's ???

Any Indian's here??​

Which of the following terms describes the layers of air surrounding the earth ?

Compare the quantity in column a with the quantity in column b. pa p a is tangent to the circle at a. column a column b ap a p ax a x question 4 options: the two quantities are equal. the quantity in column a is greater. the relationship cannot be determined from the information given. the quantity in column b is greater.

Which layer surrounds the center of the earth? a: crust b: core c: mantle