A positron is a particle similar to an electron, but with the opposite charge of an electron. If a positron and an electron collide, sometimes both the electron and positron disappear (annihilate), and two photons are created. This is an example of .A. the conversion of potential energy into thermal energyB. the conversion of rest-mass energy into radiative energyC. the conversion of rest-mass energy into kinetic energyD. the conversion of kinetic energy into rest-mass energy

C the conversion of rest mass energy into kinetic energy

Explanation:

The positron is similar to the electron but with an opposite charge. When the positron and the electron collide together, annihilation occurs where the electron and the positron disappears and two photons in form of gamma rays are produced. They are said to converted all their rest mass energy into kinetic energy.

This is described as the conservation of relativistic energy.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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