Atoms exhibit line spectrum when an electron moves from the excited state to the ground state.
Answer: C) The net force on the brick is 0 N, and the brick remains at rest.
A chemical change cannot be separated by any physical means it is always separated by chemical means
The answer is D. energy of activation increase
A biomedical device is a device that could help save the life of a person or to improve his quality of life, some examples are MRI's, artificial knees and joints or pacemakers.
