Explain how the law of conservation of energy applies to the energy transformation you chose above (electrical energy, chemical, sound energy, and thermal energy) staring from the phone charging from the outlet Two students got together to study for their science test. on the table where they were studying they had a glass of water and identical cell phones. both of their phones had run out of battery so they plugged their phone into the same outlet to charge. one student’s charging cord was 3 ft long and the other student’s charging cord was 9 ft long. vibrate, ring, and light up. As this occurred, the phone bumped into the mostly full glass of water causing it to almost spill.