different solids are combined physically
physical_surface is tangible_thing. rdf_triple_store_physical is tangible_thing. dual_microtubule_connected_kinetochore is tangible_thing. solids is band. transport_protein is naturally_occurring_tangible_substance. weight is physical_property. prepared_solid_food is solid_tangible_artifact. ground is naturally_occurring_tangible_substance. ground_meat is homogeneous_structure. different_elements has different_mechanical_properties