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Selection of an elevator for a given extraction should consider all of the following EXCEPT:

Which surface contact is essential for initiating controlled luxation with a dental elevator?

Elevation from which aspect of the tooth roots is preferred to minimize fracture risk and maximize efficacy?

Which statements about images are correct? (There could be more than one correct choice.) 

Monochromatic light falls on a metal surface and electrons are ejected.  If the intensity of the light is increased, what will happen to the ejection rate and maximum energy of the electrons?

In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 450 nm. What is the work function of this material?

A 5.0-μF, a 14-μF, and a 21-μF capacitor are connected in parallel.  How much capacitance would a single capacitor need to have to replace the three capacitors?

As the temperature of a blackbody increases, what happens to the peak wavelength of the light it radiates?

If a quantity you calculated has units of A ∙ s, what is that quantity?

An electron is initially moving to the right when it enters a uniform electric field directed upwards, as shown in the figure. Which trajectory (X, Y, Z, or W) will the electron follow in the field?