Which of the following statements about newton's second law is not true?

measure their densities same density, same sub

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table

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.