The electrostatic potential satisfies Laplace’s equation in any region free of charges. Also the heat equation (Sec. 12.5) reduces to Laplace’s equation if the temperature u is time-independent ("steady-state case"). Using (20), find the potential (equivalently: the steady-state temperature) in the disk if the boundary values are (sketch them, to see what is going on)

the correct choice is a .

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this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.  

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation: