Energy

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?