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Broom- hill, Pendlebury, by tutors till he was about fifteen years of age. At fifteen he commenced working in the brewery, which, as his father's health declined, fell entirely into the hands of his brother [...] of his father’s home. His earliest experiments explored the relationships between electricity and work. In 1840, at the age of 22, he established that a conductor carrying an elec- tric current became [...] to each other what good can come out of a town where they dine in the middle of the day?” Joule’s work was so impressive that his provincial origins were forgiven, and by the late 1840’s he was regularly

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• The hard work of experimenting James Prescott Joule, William Thomson, and the mechanical equivalent of heat.

the world-changing effect that his work in physics and engineering would have. William, later to become Sir William, Baron Kelvin of Largs, achieved a monumental work in his lifetime, publishing 661 scientific [...] died of cholera two years after he was elected. In turn, Thomson devoted his life to working at Glasgow, continuing to work there for 53 years. Another great scientific interest of Thomson’s came about after [...] the experiments he had performed in his brewery, which dealt with temperature and mechanical work. His work impressed and intrigued Thomson so much that he stood and praised the author, and even joined

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• The hard work of experimenting James Prescott Joule, William Thomson, and the mechanical equivalent of heat.

values of the mechanical work W and the heat Q in the Joule’s simulation. 5. Explain how the most accurate calculation of the value of the relation between the mechanical work and the heat is achieved [...] the device, which was constructed by Joule, when he demonstrated the relation between the mechanical work and the heat. 2. Experiment with the simulation concerning the Joule’s experimental device for the

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• Scientific Partnership; James Prescott Joule, William Thomson, and the mechanical equivalent of heat.
• The hard work of experimenting James Prescott Joule, William Thomson, and the mechanical equivalent of heat.

………………………………………………………………………………… Activity 4 The formula W=m.g.h is used for the calculation of the work produced through the fall of a body with a mass of m. The mass is measured in kg, where g expresses [...] the constant height from which bodies fall measured in m. We will use it in order to calculate the work produced during the fall of the weights of the device. The heat produced in the cylinder with the [...] evolved various experimental settings were used, new methods were applied and the relation between work and heat was calculated as can be seen in the table below: Table 3 W=4,2 (Joule/cal) x Q . W is calculated

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• Scientific Partnership; James Prescott Joule, William Thomson, and the mechanical equivalent of heat.
• The hard work of experimenting James Prescott Joule, William Thomson, and the mechanical equivalent of heat.

Rumford’s work with re- spect to energy conservation, the importance of Lavoisier's work lies not in the fact that his system can be seen as the accepted theory – and actually Rumford’s work did not change [...] became familiar with the work of Victor Regnault and Sadi Carnot. The latter had demon- strated that the work of a steam engine is depend- ing on the temperature difference, thus the work was not equivalent [...] The hard work of experimenting Storytelling Teaching Model: www.science-story-telling.eu Joule_Didactical-Scenarios.pdf Illustrating the the possible transformation of heat into work and work into heat

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• The hard work of experimenting James Prescott Joule, William Thomson, and the mechanical equivalent of heat.

The solar heater had become a solar cooker. Over the next several years, Augustin contin- ued to work on his solar energy idea, employing his natural creativity and his university training in physics [...] then, Augustin set out to lay the groundwork for his solar dreams in other ways: by writing about his work and applying for patents. Astonishingly, while still being a full-time mathe- matics teacher, he managed [...] to register three patents for his designs, and by 1876, he had achieved suf- ficient fame with his work that the government awarded him a silver medal. Most importantly, though, that year Augustin was granted

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• Mouchot and the solar cooker

exploring solar cooking, based on the work of Horace-Bénédict de Saussure and Claude Pouil- let. Horace de Saussure was a French - Swiss scien- tist and started his work of solar cooking in 1767 building a [...] stem power. Solar cooking was his another field of investigations. Exploring solar cooking he used works of Hor- ace-Benedict de Saussure and Claude Pouillet. Mouchot also demonstrated prin- ciple of ice [...] bizarre – even magical.” Mouhout won a first place medal at this exhibi- tion and could continue his work on the devel- opments. In 1869 he poured himself into writing the first book ever devoted to solar

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• Mouchot and the solar cooker

a result, the French government ceased to support Mouchot’s research financially. This brought his work to an end. References Kryza, F. (2003). The Power of Light: The Epic Story of Man’s Quest to Harness

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• Mouchot and the solar cooker

measured the energy converted from food into heat and mechanical work (Rubner, 1902). Several other scientists worked on a theory of nutrition and work to enhance human performance in industry and the military [...] energy for their work in factories. After von Helmholtz’s publi- cation on the conservation of the “living force,” 11 it seemed obvious working men had to convert their food into mechanical work and that these [...] person at rest and second with a person at work We found that the person at work produces more carbon dioxide than the other at rest, which means that the person at work uses more oxygen in respiration and dur-

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• Antoine Laurent de Lavoisier and respiration

create a work force for his new “military workhouses”—factories to produce goods, such as clothing for the military to reduce the cost of its operations. Then, he encour- aged the soldiers to work for their [...] degree of military fame I have acquired, the road is open to me for the rest.” He had the freedom to work as he liked, and because no one knew his mission, he was free of criticism or opposition. Little did [...] and told, first, that begging was now outlawed, and second, that a paying job with food and good working conditions was awaiting them at the military workhouse. It was a bold and risky experiment. Early

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• Rumford and nutrition