At what height above the earth surface will the gravitational acceleration be 5mphysics

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The acceleration due to gravity at height r = a = GM/r²

Rearranging

r² = GM /a

= (6.674 x 10⁻¹¹ x 5.972 x 10²⁴ ) / 5

r = 8.917 x 10⁶ m

r = 8917 Km

Now Radius of earth = 6371 Km

So height = 8917 - 6371 = 2546 Km

c is the answer because when something is left after something evaporates that shows the chemical change.

it's c. elements are placed in rows based on how may valencies electrons have.