<span>The reason a static method can't access instance variable is because static references the class not a specific instance of the class so there is no instance variable to access.</span>
Answer:
Constructive interference
Explanation:
Here, the medium is same, same wavelength, same frequency, same amplitude and same direction of propagation.
Let the intensity of waves be I which is same for both
The formula for the net intensity is

where, Ф be the phase difference
So, 
Here, IR is maximum so the interference is constructive in nature.
B.
It can go from very hot to very cold, it depends on the area of the moon and where the sunlight hits.
<span><u><em>This begins with the sun’s radiation,
which is absorbed differently on the earth’s surface. The earth's
surface is heated differently because of scenarios like cloud cover,
mountains, valleys, water bodies, vegetation and desert lands.</em></u>
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<u><em>Good luck! </em></u></span><u><em></em></u>