Explanation:
It took for the sound to reach the 1st wall and at the same time time, the same sound took to reach the 2nd wall. Assuming that the sound travels at 343 m/s, then let be the distance of the person to the 1st wall and be the distance to the 2nd wall. So the distance between the walls X is
Gene flow occurs if a portion of population migrate or emigrate ...there would be gene flow !
genetic drift is just a gene flow but happens by chance !
The change in position of an object is called motion of that object.
Answer:
the potential energy a massive object has in relation to another massive object due to gravity
Answer:
D. Photoelectric cell
Explanation:
Photoelectric cell converts light energy into electrical energy. They can do this because of something called the photovoltaic effect