The flying tea bag

In this activity, students observe an empty tea bag that is set alight. The burning causes a column of hot ...

One of the requirements for heavier-than-air flying machines is a structure that combines strength with light weight. This is true ...

In this activity, students observe an empty tea bag that is set alight. The burning causes a column of hot ...

All tea is made from the leaves of the tea plant, Camellia sinensis. Six main types of tea are produced ...