Covalent interactions (bonds) hold atoms together within molecules. Covalent bonds are strong, with enthalpies are on the order of 100 kcal/mole (400 kjoule/mole). Covalent bonds break during chemical reactions, as during the burning of paper.
Public bodies reports. Public bodies 2014 provides a directory of data on non-departmental public bodies (. ), executive agencies and non-ministerial departments (NMDs), as well as summary information on the size and expenditure of these bodies and information on public appointments.
The best known of these bodies are the public constabulary forces that patrol public spaces, often in marked cars, and whose members wear a uniform. They are the most visible representatives of the civil authority of government, and they provide the model typically associated with police organizations.