Questions

Each model of a computer has a unique machine language.

I am black gold i.e charcoal. It is black when it is not used and when using it is red due to fire and when used it is in grey color as it becomes ash. 

The only bird that can rotate its head to 270 degrees is OWL.

The mesosphere lies above the stratosphere and extends to an altitude of about 85 km. This is layer is often referred to as the cold layer, as the lowest readings in the atmosphere are found here.

Temperature decreases with height, reaching a minimum average value of -90 ºC at the top of the layer.

Hierarchy is a method to structure an establishment employing various levels of administration and a vertical section, or series of command, between higher and lower levels of the organization. Superior levels dominate lower levels of the bureaucracy.

The Speaker is at the top, and the members are at the bottom.

In the OSI model of computer networking, a frame is the protocol data unit at the data link layer. Frames are the result of the final layer of encapsulation before the data is transmitted over the physical layer.

A single packet on a data link is known as Frame.