Final answer:
Unloading or exfoliation is the physical weathering process that results in sheeting and exfoliation domes in granitic rock.
Step-by-step explanation:
The physical weathering process that results in sheeting and exfoliation domes in granitic rock is called unloading or exfoliation. Unloading occurs when overlying materials, such as soil or rocks, are eroded away, causing the granite to expand and crack parallel to the surface. This process creates thin layers of rock that separate and peel away, forming exfoliation domes.