Step-by-step explanation:
A glass knife is not suitable for many cutting tasks because it is brittle and can easily break or chip, especially when used to cut hard or dense materials. Glass knives are typically used in scientific applications, such as in histology or electron microscopy, where a very sharp and precise cutting edge is needed to make thin and precise sections. However, they are not practical for general purpose cutting tasks, such as in the kitchen, workshop, or for crafts, due to their fragility and limited cutting ability. Other types of knives made from more durable materials, such as steel or ceramic, are better suited for everyday cutting tasks.