Question

In Physics:

Choose one topic to write on from the following list of topics.

• Electric motors are much more efficient than gas engines, does this fact alone suggest we should move to electric cars? Discuss from the point of view of an environmentalist OR Oil Company OR Government official.

• What is the difference between an energy source and something that stores energy? Are batteries sources of energy? Is hydrogen a source of energy?

• Describe what is meant by an explosion and what is going on in terms of atoms and molecules. Give examples of small "explosions" that serve useful purposes.

• Describe in a post what aspects of this chapter you think are most important. What would you tell your friends are the key points that are important for future presidents or just good citizens?

Answer 1

What is the difference between an energy source and something that stores energy? Are batteries sources of energy? Is hydrogen a source of energy?

Energy sources have normally large amounts of energy whereas something that stores energy have less amount of energy that might get depleted in a short time.

Examples of energy sources are Renewable sources like Solar, Wind, Geothermal, hydrogen, etc and Non-renewable sources like Coal, Oil and Natural Gas.

Energy storage or something that stores energy accumulates energy for a short time and are called Accumulator or Batteries.
As we have seen, batteries are not sources of energy but something that stores energy, whereas hydrogen is a huge source of energy.