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Among other things firewood, carbon, and - depending how far you go back in time - petroleum. Also some water and wind energy.

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Is there a limit to how many times energy can be transferred?

In theory, energy can be transferred multiple times in various forms such as from one object to another or between different forms like potential and kinetic energy. However, with each transfer, some energy may be lost as heat due to inefficiencies in the system, so there is a practical limit to the number of times energy can be transferred before it becomes too low to be useful.


How many times did Alessandro Volta try and make the battery and fail?

Alessandro Volta tried many times to create a battery before being successful. It's estimated that he conducted over a thousand experiments before inventing the voltaic pile, the first modern electric battery, in 1800.


How has the consumption of energy per person changed over the last 50 years?

There was not that much of a usage before but in modern times people are using too much energy. An example is large houses. You look behind the house and you see at least 2 huge air conditioners. It is using too much energy.


What is the energy in a spring in a pinball machine before it is released?

The energy stored in a spring in a pinball machine before it is released is potential energy. When the spring is compressed, it gains potential energy due to the elastic potential energy stored in it. This potential energy is then converted into kinetic energy when the spring is released, propelling the pinball into motion.


What famous equation did Einstein propose about the relationship of matter and energy?

Einstein proposed the equation E=mc^2, which states that energy (E) is equal to mass (m) times the speed of light (c) squared. This equation demonstrates the equivalence of mass and energy and is a fundamental concept in modern physics.

Related Questions

In what parts of the world did most people live before modern times?

Most people lived in Europe and Asia.


How did people transport rocks before Modern Times?

The used to push them with the help of logs


Why did people use wood-burning stoves before the industrial revolution?

Because there was no electricity for electrical stoves in modern times


What was likely a way people explained disease before modern times?

Either as illness or the work of demons or some supernatural force.


Who was the god of energy?

Energy is much a notion of modern times, so none of the ancient gods will fit in there.


Country with most influence on Japan before modern times?

China


What do people sell in Egypt in modern times?

food


What substances are in a thermometer?

Red and blue coloured alcohols are the most common in modern times, although mercury was used for a long time before people figured out how toxic it was.


Are we less racist today?

No. People are just as intolerant in modern times as they were back when. Things have changed towards how racists can treat those they despise, but it's still there as it was before.


What samurai techniques can be used in modern times?

After WWII people could no longer become samurai, but the devotion of samurai is still used in modern times.


How did women cure yeast infections before modern times?

They poured lemonade on the troubled areas.


Do people still worship Egyptian gods in modern times?

Yes, some people still worship Egyptian gods in modern times, particularly in the form of modern pagan or Kemetic religions. These belief systems draw inspiration from ancient Egyptian mythology and practices.