Which graph best represents the relationship between gravitational potential energy (PE) and height above ground (h)

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.

Positrons are spontaneously emitted from the nuclei of

Which sound characteristic is not affected by the relative motion of an object