Why is the sky blue? Why does the moon appear in the daytime?
How much does the sky weigh?
How do airplanes stay in the air?
Why is water wet?
Why don't birds get electrocuted when they land on an electric wire?​

the sky is blue because of reflection of blue light of sea and ocean.

the moon appear in the daytime because light of sun is brighter than of moon

airplanes stay in the air by maintaining balance in air and gravity.

birds did not get electrocuted when they land on an electric wire because there body is non conductor.

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."