The diagram represents an energy change. waste energy
energy input
useful energy
output
Copy and complete the following two word equations for this energy change:
waste energy =
b efficiency=

Waste energy = Energy Input - Useful Energy Output (Principle of Energy Conservation)

Efficiency = Useful Energy Output/Energy Input (Definition of Energy Efficiency)

Explanation:

The waste energy is the difference between energy input and useful energy output. Then, the word equation is:

Waste energy = Energy Input - Useful Energy Output (Principle of Energy Conservation)

The efficiency, measured in percentage, is the ratio of the useful energy output to the energy input and multiplied by 100. Then, the word equation is:

Efficiency = Useful Energy Output/Energy Input (Definition of Energy Efficiency)

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray

chemical energy --> gravitational potential energy --> kinetic energy --> elastic potential energy --> gravitational potential energy

explanation:

when emma starts the hike, the chemical energy stored in her body is used to climb up the mountain, and so she gains gravitational potential energy (because at the end, she will be at a higher height h above the ground). then she goes bungee jumping: as she falls, this gravitational potential energy is converted into kinetic energy (because her speed increases as she falls down), until the point when the rope stretches, and she stops moving. at that moment, all the kinetic energy is converted into elastic potential energy due to the stretching of the rope. then, this energy is released because the rope returns to its natural length, and emma gains a small increase in altitude , so she gains some gravitational potential energy.