Answer:
None of the wavelength is in the visible range
Explanation:
Constructive interference of the reflected waves for different wavelengths can be estimated using:
λ = 2nd/m
where m is 1,2,3, ...
Therefore:
m=1, λ = 750 nm
m=2, λ = 750/2 = 375 nm
The limits of eye's sensitivity is between 430 nm and 690 nm. Beyond this range, the eye's sensitivity drops to approximately 1% of its maximum value.
The net force acting on the object perpendicular to the table is
∑ F[perp] = F[normal] - mg = 0
where mg is the weight of the object. Then
F[normal] = mg = (15 kg) (9.8 m/s²) = 147 N
The maximum magnitude of static friction is then
0.40 F[normal] = 58.8 N
which means the applied 40 N force is not enough to make the object start to move. So the object has zero acceleration and does not move.
Answer:
Inductive Reactance is caused by the induced voltage and is proportional to the number of wire turns, strength of magnetic field and the speed of cutting action.
Explanation:
Inductive reactance is the opposition of a circuit element to the flow of current due to that element's inductance.
It is caused by the induced voltage and depends on the factors that determine the induced voltage.
It is proportional to the number of wire turns & strength of the magnetic field (which both depend on the physical make-up of the inductor) and the speed of cutting action which depends on the frequency.