Which occurs at a convergent boundary where one plate moves under another plate? a. earthquakes b. mid-ocean ridge c. folds d. rift valleys

c. rb

explanation:

the atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.