Response:
The resistivity can be expressed as
Clarification:
According to the information provided,
The value of the electric field measures
The density of current is given as
Typically, resistivity is represented in mathematical terms as
by inserting values
Answer:
The air exiting from the hairdryer is moving at a speed of 10 m/s.
Explanation:
The thrust generated by the hairdryer enables it to maintain an elevation angled at 5° from vertical; thus, we derive from the force diagram
by substituting ,
into the equation and resolving for
we find:
This thrust is linked to the speed of air ejection through the equation
where signifies the rate of air ejection, which is known to be
and since ,
by inserting these values into equation (2), we obtain the value of as:
resulting in
which indicates the air velocity discharged from the hairdryer.
