The base of the 3rd metacarpal articulates with which carpal? ...

[deesands]

The base of the 3rd metacarpal articulates with which carpal?
 
 trapezoid
  capitate
  hamate
  trapezium

Question 2

In accordance to the anode heel effect, the thicker part should be aligned with:
 
 either end
  the cathode
  the center of the beam
  the anode

[covalentbond]

Answer to Question 1

capitate

Rationale: The base of the 1st metacarpal articulates with the trapezium, the base of the 2nd metacarpal articulates with the trapezoid, the base of the 3rd metacarpal articulates with capitate, and the bases of the 4th and 5th metacarpal articulate with the hamate.

Answer to Question 2

the cathode

Rationale: According to the anode heel effect, the thicker part or the heel should be aligned with the cathode end of the tube to assist with production of more uniform density.

[deesands]

Thanks for the timely response, appreciate it

[Zebsrer]

Great answer, keep it coming