Answer:



Explanation:
From the question we are told that
Voltage 
Generally in a case of Y_connection
is mathematical represented as

Generally voltage drop across phase A


Generally voltage drop across phase B


Generally voltage drop across phase C


True.
As the length of the conductor increases, so also the resistance to the flow of current increases along the conductor.
It will cause heat from friction
First, we determine the volume of the trunk by finding
first the radius from the circumference through the equation,
<span> C
= 2πr</span>
<span> r
= C/2π</span>
Substituting the known values,
<span> r
= 4.5/2π = 0.716 m</span>
Then, we calculate for the volume through the equation,
<span> V
= πr2h</span>
<span> V
= π(0.716 m)2(8m) = 12.9 m3</span>
Multiplying the calculated value to the density will give
the mass as,
<span> Mass
= (12.9 m3)(752 kg/m3) = <span>9699.36 kg</span></span>
Canoe will start from rest and reach to speed v = 0.30 m/s
so here we will have


now in this speed increase it will take 0.75 second of time
so we can find the acceleration of canoe as we know that acceleration is rate of change in velocity


now we can find the force on Canoe by using Newton's II law

here m = mass of girl + mass of canoe
m = 27 + 52 = 79 kg
now by above formula

so here it will have net force F = 31.6 N