The distance-time graph of a body is as shown in the figure. The part of the graph that represents the
uniform speed of the body is
(a) OA
(b)AB
(c)BC
(d)N
Both OA andBC

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the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.