To make a crucible oneself, one can start by obtaining a heat-resistant material such as clay, graphite, or silicon carbide. Then, the material can be shaped into a small, cylindrical container with a flat bottom and tall sides. The container can be fired in a kiln or furnace to harden the material and make it heat-resistant. Finally, the crucible can be cooled and then used for melting and casting metals or other high-temperature applications. **

"ws Physik" is an abbreviation for "wissenschaftliche Physik," which translates to "scientific physics" in English. It refers to the academic discipline that studies the natural phenomena of the physical world, including the properties and interactions of matter and energy. In a university context, "ws Physik" may be used to denote courses, research, or programs related to the study of physics. **

The 5 Ws are a set of questions used in journalism and research to gather information about a topic. They include: who, what, when, where, and why. These questions help to ensure that all relevant information is gathered and reported accurately. By answering the 5 Ws, a complete picture of a situation or event can be presented. **

A graphite crucible will start to glow red at temperatures above 700 degrees Celsius. As the temperature increases, the intensity of the glow will also increase. At temperatures around 1000 degrees Celsius, the graphite crucible will emit a bright orange glow. **

Graphite for a crucible can be produced through a process called graphitization. This involves heating carbon materials, such as petroleum coke or coal tar pitch, to high temperatures in a controlled environment. The carbon material is first heated to around 3000 degrees Celsius to create a carbonized product, and then further heated to around 2500 degrees Celsius to convert it into graphite. This process allows for the carbon atoms to rearrange into the crystalline structure of graphite, resulting in a material with high thermal stability and resistance to chemical corrosion, making it suitable for use in crucibles. **

"Gesamtschule freie WS" translates to "Comprehensive School Free WS" in English. This term refers to a type of school in Germany that offers a comprehensive education for students of all abilities and backgrounds. The "WS" likely stands for "Wahlschule," which means "choice school," indicating that students have the freedom to choose their courses or subjects of study. **

A flower pot is not typically designed to withstand the high temperatures required for melting metals or other materials, which is a key function of a crucible. Crucibles are usually made of materials such as ceramic, graphite, or metal that can withstand extreme heat. Using a flower pot as a crucible could result in the pot breaking or shattering due to the high temperatures, making it unsuitable for this purpose. It is recommended to use a proper crucible made of heat-resistant materials for any melting or high-temperature applications. **

You cannot melt iron in a copper crucible because iron has a much higher melting point than copper. Iron melts at around 1538°C, while copper melts at around 1085°C. This means that the copper crucible would melt before the iron reaches its melting point, making it impossible to contain the molten iron. Additionally, the two metals can form an alloy at high temperatures, which could contaminate the iron and affect its properties. **