Conservation and dissipation of energy

What does the principle of energy conservation state?

Energy cannot be created or destroyed

What is the equation for energy conservation?

Einitial​=Efinal

Energy can be destroyed within a closed system

False

Arrange the following principles of energy conservation in logical order:

1⃣ Total energy in a closed system remains constant

2⃣ Energy transforms from one form to another

3⃣ The initial total energy equals the final total energy

Match the process with its energy transformation:

Hydroelectric Power ↔ Potential to kinetic to electrical

Heat Engine ↔ Thermal to mechanical

Electric Motor ↔ Electrical to mechanical

What is energy dissipation?

Conversion to less useful forms

What is the formula for calculating energy transfer efficiency?

Useful Output Energy/Total Input Energy ​×100%

What is unwanted energy transfer usually lost as?

Heat, noise, or friction

How does energy transfer in conduction?

Particle collisions

Match the sound pollution reduction strategy with its description:

Noise Barriers ↔ Blocks sound transmission

Soundproofing ↔ Absorbs sound within buildings

Landscaping ↔ Absorbs sound and creates buffers