26. How do alloys solidify and melt? (A)At precise temperature. (B)Over a range of temperatures. (C)At temperature. (D)At exact low temperature. (E)None of above. strict high

1. A beam of light with an intensity of 15 W is. incident on a copper plate (work function is7.43xl0-19 J). Electrons with a minimum wavelength of 3.75x10 －10 m are ejected from the surface of the copper. Calculate the frequency of the incident light. [Hint: Plank constant = 6.626 x 10－34J·s] (A)3.7lx1015Hz (B) 3.71 x 1016 Hz,(C) 3.71 x 1017 Hz,(D) 3.71 x 1018Hz(E) none of above

26. How do alloys solidify and melt?
(A)At precise temperature.
(B)Over a range of temperatures.
(C)At temperature.
(D)At exact low temperature.
(E)None of above. strict high

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