# James joule inventions

## What was James Joule famous for?

Joule studied the nature of heat, and discovered its relationship to mechanical work (see energy). This led to the law of conservation of energy, which in turn led to the development of the first law of thermodynamics. The SI derived unit of energy, the joule , is named after him.

## Who discovered the unit Joule?

James Prescott Joule

## Where did James Joule go to school?

Университет Эдинбург 1871 г. Оксфорд университет 1860 г. Тринити-колледж 1857 г.

## Who discovered energy?

Between 1842and 1847, Julius Robert von Mayer , James Prescott Joule , and Hermann Ludwig Ferdinand von Helmholtz discovered and formulated the basics of what we refer to today as the law of conservation of energy : Energy cannot be created or destroyed; it can only be transformed from one form to another.

Energy

## Where did the term Joule come from?

If you raise the apple one meter in the air, you’ve used one joule of work. The word joule comes from the English physicist James Prescott Joule , who studied the relationship between heat and mechanical work, research that led to the First Law of Thermodynamics.

## How do you spell joules?

Scientific definitions for joule (1 of 2) The SI derived unit used to measure energy or work. One joule is equal to the energy used to accelerate a body with a mass of one kilogram using one newton of force over a distance of one meter. One joule is also equivalent to one watt-second.

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19th century

## Who is the scientist of physics?

Famous Physicists

Classical Period
Galileo Galilei 1564-1642 Italian
Willebrod Snell 1580-1626 Dutch
Blaise Pascal 1623-1662 French
Christiaan Huygens 1629-1695 Dutch

## Is Joule’s heating a reversible effect?

Joule ‘s law of heating is not a reversible process, because we can not directly produce electric current by just heating any resistance.

## What is meant by mechanical equivalent of heat?

In the history of science, the mechanical equivalent of heat states that motion and heat are mutually interchangeable and that in every case, a given amount of work would generate the same amount of heat , provided the work done is totally converted to heat energy.

## What did Joule’s experiment directly show?

The experiment that showed most directly the connection between mechanical action and heat involved the stirring of water by a paddle. Joule recognized that, in a container that cannot exchange heat with the surroundings, if a gas is compressed, and then allowed to expand into a vacuum, the expanding gas does no work.

## Is another unit used to measure power?

The SI unit of power is joules per second (J/s) or Watts (W).

Joseph Black