Answer:
If something is traveling at a constant velocity, then forces are balanced.
Explanation:
If something is traveling at a constant velocity, then the forces must be balanced because a constant velocity is only achieved with balanced forces.
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Answer:
Explanation:
a)
Using Ohms Law

Where J is the current density 
and the direction of E is the same as the direction of the current. Since J is uniform throughout the conductor
just inside at a radius a (and anywhere else).
b)
Since we have no changing electric fields we can use Ampere’s law in it’s simplest form without displacement current

such that

and by the right hand rule, since the current is going to the right, the magnetic field is circling around the conductor such that it’s pointing out of the page at the top and into the page at the bottom.
c)
The Poynting vector is given by

and by the right hand rule it’s always pointing in towards the center of the conductor.
d)
Note: directions of these three vectors are mentioned along with their magnitudes in above 3 parts a , b and c
Voltage is given by the formula
V = IR (Ohms law)
where V is the Voltage
I is the current
and R is the Resistance
Here it is given that the current is I=11
Resistance is R =12
so plugging this in the formula
V = IR
V= 11 * 12
V= 132 Volts
So the Voltage for the given dryer is 132 Volts
Because the atsmosphere in the sky makes it less gravity so air craft needs these cabins