Meixiu and joey used what they have learned to solve the following problem. a projectile is launched with a launch angle of 65° with respect to the horizontal direction and with initial speed 72 m/s. how long does it remain in flight?

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.

Which of the following list the divisions of the geologic time scale in order from longest to shortest

Elements that have one valence electron and are very reactive are called