Determining the efficiency of a hand-held mixer (students instruction)
In 1798, Count Rumford discovered during the boring of cannon barrels that mechanical energy can be converted into heat. We’ll try it without the cannon.
Information and ideas:
• Observe the safety information in the instructions as well as the applicable safety guidelines for your school and discuss it with your students.
• Mechanical energy can theoretically be converted 100 percent into heat, but the reverse process does not work. Why?
• You will find the answers to the questions contained in the experimention instructions on the answer sheet of the same name on the media portal of the Siemens Stiftung.