Changing the accelerating voltage of an x-ray machine without changing the target material must change:
a. the work function of the material.
b. the wavelength of all the x-rays produced.
c. the wavelength of the minimum wavelength x-ray that will be produced.
d. Both b and c are correct.
c
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If the log of the creep strain rate is plotted as a function of the log of the applied stress, the slope is equal to the _________of the applied stress.
Fill in the blank(s) with the appropriate word(s).
A boy on a skate board skates off a horizontal bench at a velocity of 10 m/s. One tenth of a second after he leaves the bench, to two significant figures, the magnitudes of his velocity and acceleration are:
a. 10 m/s; 9.8 m/s2. b. 9.0 m/s; 9.8 m/s2. c. 9.0 m/s; 9.0 m/s2. d. 1.0 m/s; 9.0 m/s2. e. 1.0 m/s; 9.8 m/s2.
An electron in a hydrogen atom is in the n = 7 shell. How many possible values of the orbital quantum number l could it have?
A) 6 B) 7 C) 15 D) 33 E) 98
An object will ______________ in a fluid if its average density is ______________ the density of the fluid
a. sink; greater than b. float; equal to c. sink; less than d. float; twice