Ann drove to the store 10 km north of her house and then drove to the library which is 5 km south of the store

5 km North

Your welcome

The rocks expand when there hot/warm  and contract when they are cold.

The modern-day generator works on the principle of electromagnetic induction discovered by michael faraday in 1831-32. faraday discovered that the above flow of electric charges could be induced by moving an electrical conductor, such as a wire that contains electric charges, in a magnetic field.