When calculating the angular velocity of the Earth as it completes a full rotation on its own axis (a solar day), this equation is represented as: Ï avg = 2Ïrad/1day (86400 seconds), which works out to a moderate angular velocity of 7.2921159 Ã 10 -5 radians/second.
Roof sarking is a membrane that is fitted during tile or metal roof construction. The flexible membrane is usually installed under the battens to provide thermal insulation and to prevent water and dust penetration in the roof space.In bushfire prone areas flying embers cannot enter this space through the roof due to sarking protection.he flexible membrane is usually installed under the battens to provide thermal insulation and to prevent water and dust penetration in the roof space. In bushfire prone areas flying embers cannot enter this space through the roof due to sarking protection.
A rake is an architectural term for an eave or cornice which runs along the gable of the roof of a modern residential structure. It may also be called a sloping cornice, a raking cornice. The trim and rafters at this edge are called rake-, verge-, or barge-board or verge-or barge-rafter. It is a sloped timber on the outside facing edge of a roof running between the ridge and the eave.