Question

The mirrors on the web telescope are made from beryllium (Be) what is a disadvantage of working with this material A it is a poor conductor of heat B it is a weak metal C it is a heavy metal D it is rare

Answer 1

The disadvantage of working with beryllium (Be) in the context of the mirrors on the web telescope is **D: it is rare**. While beryllium has several advantageous properties for specific applications (like its stiffness and lightweight nature), it is indeed considered a rare material compared to more common metals. However, it's worth noting that beryllium also has other disadvantages, such as toxicity when dust or fumes are generated during processing.