<span>There are two
types of modern wind turbines. In a Verical-axis wind turbines (VAWTs), the
shaft is mounted on a vertical axis perpendicular to the ground. They are
aligned with the wind so there’s no adjustment necessary when the wind
direction changes. It can’t start moving on itself that is why it needs a boost
from its electrical system to get started. It uses wires for support so the
rotor elevation is lower. They are less efficient than HAWTs due to its lower
elevation. Lower elevation means slower wind due to ground interferences. The other
type is Horizontal-axis wind turbines (HAWTs), the shaft s mounted horizontally
parallel to the ground. It is constantly aligned with the wind using a
yaw-adjustment mechanism. This mechanism moves the entire rotor left or right
in small increments. It uses a tower to lift the turbine components to an
optimum elevation for wind speed and take up very little ground space. It is
much more efficient than VAWT. </span>
The answer is: In recent years, scientists have discovered fossils from long ago that glaciers have hidden
25. D nucleus
27. A Small molecules are obtained from large molecules during digestion
64. D (?)
I hope this helps
<em>An impact of an asteroid strike</em><em> would be damage to the ozone layer. </em><em>The vitality bestowed to the atmosphere by </em><em>the approaching object would be sufficient to disturb the defensive layer of ozone high within the stratosphere.</em>
Glad to help ya!! :)
Looking at the features of past species you can determine how old and what differences they have from fossils.
