I think it’s B hope it helps:)
Answer:
Mechanical waves need matter to transfer energy while electromagnetic waves do not. ... Waves change direction when they move from one material into another (matter) through the process of refraction. The wave will change direction when the speed of the wave changes.
E=mgh. 196=5kg*9.81m/s^2*h. So h=196/(5*9.81)=4m
There is no <span>radioactive decay</span>
If I drop my egg unprotected, then it will break.