what is the total energy of the system and the height that the ball will reach based on m=451g g=7.6m/s/s 6.069m/s

Ineed the answer to question 1 , i’m desperate

Quantum mechanics applies to subatomic, atomic, nanometer-size, and micrometer-size systems. nanometer, micrometer, and kilometer-size systems. atomic, nanometer-size, and micrometer-size systems. subatomic, atomic, and nanometer-size systems.

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles