Which statement best explains that sound waves are pressure waves? sound waves have regions of compressions and rarefactions. sound waves cannot propagate through metals. sound waves move perpendicular to the medium particles. sound waves cannot propagate through water. nextreset

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer