sentences: unbalanced electrical charge of material causes static electricity
docs: static is non_ionizing_radiation. lightning is electrical_charge. electric_shock is electrical_conduction. electrical_charge is non_aspectual_quantity. metals has relatively_little_electrical_resistance_to_electricity electrical_charges is additive. static_electricity is electricity. superconductors has almost_no_resistance_when_conducting_electricity not_all_matter has electrical_charge static_friction is surface_force_vector.