Aperson can only see object placed at 40cm from him state his defect

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

If anyonee has done the momentum lab practical in physics can you give me the answers i am s lostt rnn : (