Questions tagged [energy]

For questions about sources of power, generation, storage, how much is needed to perform different tasks, etc.

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4
votes
3answers
146 views

How can I meaningfully define the energy cost of magical levitation?

In the world I'm building, there is a form of "magic"¹ that effectively amounts to metabolism-powered telekinesis. In particular, there is a maximum power limit of approximately 20 W/kg relative to a ...
4
votes
4answers
839 views

Would it be possible to “teleport” energy?

This is for a storyline that I have been building. Currently, scientists are able to teleport spin cubits in laboratory conditions. This is often mentioned in connection with information transfer. ...
3
votes
9answers
1k views

What would be the most practical raw fuel for a hydrogen economy?

In a near-future world we have stopped directly fueling private, public, and mass transit and we have migrated to a hydrogen economy as the standard energy carrier. Consider the following factors: ...
3
votes
4answers
3k views

How would technology differ, if fossil fuels never existed?

Although the fossil fuel coal had been used as a fuel since 1,000 B.C., it wasn't until the arrival of the Industrial Revolution from the mid-1700s through the 1800s that coal began to replace biomass ...
3
votes
2answers
1k views

Harnessing the Moon's kinetic energy

Instead of trying to tether the Moon, can we somehow harness the Moon's kinetic energy, the same way we do wind? If so, how is this possible?
2
votes
4answers
207 views

Solar panels on rotating wheel space stations

What would be the best configuration of solar panels on a rotating wheel space station? I am thinking about Space Station V design and dimensions. Space Station V comes from 2001: A Space Odyssey. ...
2
votes
4answers
220 views

A discriminating lightsaber?

In a type III civilization probably even type II, would have developed solid energy construct resembles force shield which acts like a semi-permeable membrane to allow friend to pass but prohibit ...
1
vote
1answer
290 views

Are human batteries energy efficient? [closed]

After watching Animatrix I started to wonder if it would be energy efficient to draw power from human "batteries". Without the Sun there would be no endless - in our time frame - source of power. ...