The Sankey diagrams below show the energy transfers in two light bulbs. How much energy is wasted by light bulb 2?

The amount of energy wasted by light bulb 2 = 70 J

Explanation:

Sankey diagrams are used to graphically indicate the proportional flow rate of a quantity

The labelled Sankey diagrams, here, indicate the energy transfers in two light bulbs, light bulb 1 and light bulb 2

From the labelled Sankey diagrams, we have;

For light bulb 1, the input energy = 80 J

The useful energy = 40 J

The wasted energy = 80 - 40 = 40 J

For  light bulb 2, the input energy = 80 J

The useful energy = 10 J

Therefore, the wasted energy = 80 - 10 = 70 J

The amount of energy wasted by light bulb 2 = 70 J.

70 Joules of energy is wasted by light bulb 2 whereas bulb 1 wasted 40 joules of energy.

Bulb 1 uses 40 joules of energy out of 80 joules of energy and 40 joules of energy are wasted out of 80 joules of energy while on the other hand, bulb 2 uses 10 joules of energy as useful energy and 70 joules of energy are wasted out of 80 joules of energy.

According to the image, bulb 2 wasted more energy than bulb 1 so we can conclude that 70 joules of energy is wasted by bulb 2 out of 80 joules of energy.

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as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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