sort the cans by size put the cans in water cool the cans to a low temperature put the cans under an electromagnet
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Steel cans are separated from aluminum cans in a recycling center. Which of the following is the best way the recycling center can separate the steel cans from the aluminum cans?
Possibilities:
- sort the cans by size
- put the cans in water
- cool the cans to a low temperature
- put the cans under an electromagnet

put the cans under an electromagnet