The amount of energy it takes to lift a box might be a function of the weight of the objects inside the box. Work is proportional to force and distance. The force of the box is the weight itself of the box. Hence the answer to this problem is B.
Answer:
The wavelength is 
Explanation:
From the question we are told that
The thickness is 
The refractive index of the non-reflective coating is
The refractive index of glass is 
Generally the condition for destructive interference is mathematically represented as

Where
is the angle of refraction which is 0° when the light is strongly transmitted
and n is the order maximum interference
so

at the point n = 1



at n =2




Now we know that the wavelength range of visible light is between

So the wavelength of visible light that is been transmitted is

The basic relationship between voltage, resistance and current of an electrical device is given by Ohm's law:

where
V is the voltage
I is the current
R is the resistance
The hot plate in our problem is connected to a source of V=120 V and it has a resistance of

, therefore we can rearrange the previous equation to calculate the current through the device:
Power = (voltage) x (current). The motor consumes (12)x(206)=2,472 watts. Some of it is dissipated as heat, but most of it is used to do useful work by turning the engine over to make it start.
When the piece of metal blundered into the air-core coil, it changed the inductance of the coil.