What makes a glass different from a solid such as quartz ? Under what conditions could quartz be converted into glass ?

Under what conditions is work said to be done?

Rohit went to Jaipur with a school trip to visit some historical places. He and his friends observed that some old glass objects looked milky and windows pane of old buildings were looking slightly thicker at the bottom than at the top. Answer the following questions Under what conditions could quartz be converted into glass?

Under what conditions a concave lens can behave as a converging lens?

Under what conditions glucose is converted to gluconic and saccharic acid?

Under what condition is the relation S= ut correct?

Under what conditions are C_4 plants superior to C_3 ?

What is corpus luteum? Under what conditions does it undergo degeneration?

Under what conditions angular momentum of a moving body is zero?