The y-coordinate of the centroid of the figure below is located at y = (in.):
(A) 2.2
(B) 3.2
(C) 4.2
(D) 2.8
(A) 2.2
Physics & Space Science
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A photocathode whose work function is 2.5 eV is illuminated with white light that has a continuous wavelength band from 360 nm to 700 nm. The stopping potential for this white light illumination is closest to:
A) 0.94 V B) 0.85 V C) 1.0 V D) 1.1 V E) 1.2 V
Physics & Space Science
Alkali metals have how many electrons past the noble gas configuration?
A. 1 B. 2 C. 3 D. 4 E. 5
Physics & Space Science
Since its density is similar to ours, we think that Venus too has a core of ________
Fill in the blank(s) with correct word
Physics & Space Science
Of the following photons, which has the lowest energy?
a. visible b. ultraviolet c. infrared d. microwave
Physics & Space Science