Calculate the heat when a 250 g sample of water is heated from 15◦c to 100◦
c.

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.

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

Positrons are spontaneously emitted from the nuclei of