The third one.......................
The cold air sinks as it is heavier
This is diffraction. Reflection<span> is when waves, whether physical or electromagnetic, bounce from a surface back toward the source. ... </span>Refraction<span> is when waves, whether physical or electromagnetic, are deflected when the waves go through a substance. </span>
Answer:
ooh thanks but don't give me advise
1950 g This is the answer due to the kilograms of lead being distributed