¡Hola!
For this problem, first, lets recabe information:
v = 0 m/s
t = 3 s
g = 9,82 m/s²
v' = ?
d = ?
First, for calculate the final velocity:
v' = v + g * t
v' = 0 m/s + 9,82 m/s² * 3 s
v' = 29,46 m/s
Now, for calculate how far did it fall:
d = v * t + g * t^2 / 2
Like v = 0 m/s, we can simplificate equation:
d = g * t^2 / 2
d = 9,82 m/s² * (3 s)^2 / 2
d = 9,82 m/s² * 9 s² / 2
d = 88,38 m / 2
d = 44.19 m
¡Buena suerte!
<span>There are five (5) levels of cell
organization recognized by biologists. They are cells, tissues, organs, organ
systems and organisms. These are applicable to multicellular organisms though
as they are needed for the cells to sustain their functions alone and
eventually coordinating with one another.
Cells are the basic unit of life, when grouped together, they are
tissues. When tisuues are grouped together, they are organs and organ systems comprises
of two or more organs to function and overall, creating an organism.</span>
The direction in which the wave is moving.
The moths that did not evolve,due to the lack of traits to survive, died off. Over time the species evolved/adjusted to the new conditions. Soon enough the whole species had evolved.
Close enough? I had this in 7th grade. Good luck!
My GUESS is that as the sound source moved past the observer, the pitch that he heard dropped suddenly, to a lower note. That's only a guess, though. You really need to check with somebody who was there and actually observed it.