Which of the following is not a way that human activity has negatively affected the biodiversity of ecosystems? A Introduction of invasive species B Habitat destruction C The planting of trees D Overexploitation

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.

Could someone me find the answer to this problem.

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?