Energy
- Which engine is better at high altitude: diesel or gasoline?
- What is a short circuit?
- Why can’t fusion energy solve the global energy crisis?
- Is there a way to harness electricity from lightning?
- How do birds sit on high-voltage power lines without getting electrocuted?
- Can we use heat generated from an air conditioner or refrigerator?
- What’s the difference between AC and DC?
- Is it possible to collect energy from a moving roller coaster?
- Why can’t magnetism be used as a source of energy?
- How does a battery work?
- Can we calculate the efficiency of a natural photosynthesis process?
- Could we use exercise machines as energy sources?
- Can sound be converted to useful energy?
- Is it possible to construct a perpetual motion machine?
- What’s the difference between fuel efficiency and fuel economy?
- Is it possible to collect energy from foot traffic?
- How many wind turbines would it take to power all of New York City?
- Which is more likely to happen first: solar panels on every home, or giant solar power plants?
- Can traditional gasoline-powered cars be converted to run on hydrogen fuel cells?
- Why do the products of a nuclear fission reaction in uranium have three neutrons but not three protons?
- What happens to electricity when nothing is plugged into an outlet?
- How can solar cells become cost-effective enough to be commercially viable?
- What is the energy of gasoline compared to the same cost of other fuels in BTUs per dollar?
- What is “clean” coal?