The Einstein frequency is often expressed in terms of an equivalent temperature θE, where θE = hv/k. Confirm that θE has the dimensions of temperature, and express the criterion for the validity of the high-temperature form of the Einstein equation in terms of it. Evaluate θE for

(a) diamond, for which ν =46.5 THz and

(b) for copper, for which ν = 7.15 THz.

What fraction of the Dulong and Petit value of the heat capacity does each substance reach at 25°C?

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.  

the doppler effect is used by weather forecasters to measure 

moving clouds