Answer:
Oscillation whose amplitude reduce with time are called damped oscillation. This happen because of the friction. In oscillation if its amplitude doesn't change with time then they are called Undamped oscillation
We have the relation
where 
denotes the velocity of a body A relative to another body B; here I use B for boat, E for Earth, and R for river.
We're given speeds
Let's assume the river flows South-to-North, so that
and let 
be the angle made by the boat relative to East (i.e. -90° corresponds to due South, 0° to due East, and +90° to due North), so that
Then the velocity of the boat relative to the Earth is
The crossing is 153.0 m wide, so that for some time 
we have
which is minimized when 
so the crossing takes the minimum 30.0 s when the boat is pointing due East.
It follows that
The boat's position 
at time is
so that after 30.0 s, the boat's final position on the other side of the river is
and the boat would have traveled a total distance of
High voltage transmission wires. Electrical lines you see outside of your home and basically everywhere you go.
<span>1 C = 6.24150965(16)×10^18 electrons
31.25 x 10^18 electrons / (6.24150965(16)×10^18 electrons / C) = 5.007 Coulombs
</span><span>I hope this helps. </span>
The color for the moon is gray because if you would look outside when it is dark you would see the moon cloor gray
