What is the volume of new oceanic basalt added to earth’s crust each year? assume that the thickness of the new crust is 5 km, that there are 60,000 km of rifts, and that the average speed of plate motion is4 cm/y. what fraction of earth’s entire volume does this annual addition of new material represent?

Answerthe force between the charges will be  f/9 (one-ninth of force f)explanationcoulomb's law relates the magnitudes  two point charges q₁ and q₂, the distance, r, between the charges, and the electrostatic force, f, between the two charges:     k represents coulomb's constant, k = 8.99×10⁹ n·m²/c².note that if we have r = 3r, then   

Answavelength; amplitude;

The answer would be d. hope this : ))