Final answer:
It is true that foods should never be stored under waste water lines to prevent contamination. Additionally, electric-field lines from a positive charge spread outwards, and dropping a magnet through a copper tube does induce an electric current.
Step-by-step explanation:
It is indeed true that you should never store foods under waste water lines. This practice is essential for maintaining food safety as waste water lines may leak, potentially contaminating food with bacteria and other hazardous substances. Restaurants and other food service establishments must adhere to strict regulations to prevent cross-contamination, which includes proper storage of food away from potential sources of contamination.
Upon inspection of other true or false statements related to different subjects, it is also true that the electric-field lines from a positive point charge spread out radially and point outward. This is a fundamental concept of electric fields in physics. Also, when you drop a bar magnet through a copper tube, it indeed induces an electric current in the tube due to the property of electromagnetic induction.