How do the conditions in tube c prevent air reaching the iron nail​

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.

Does a energy transformation happen when you drop your pencil