Which wave interaction is shown by the diagram?

absorption
diffraction
reflection
refraction

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

He viscosities of several liquids are being compared. all the liquids are poured down a slope with equal path lengths. the liquid with the highest viscosity will

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.