Question

A small, hollow metal cylinder is closed at one end. Its mass is known. Which of the following instruments are required to find the density of the metal? 

(a) Slide callipers only 

(b) Slide callipers and screw gauge 

(c) Screw gauge and spherometer 

(d) Slide callipers and spherometer

Answer 1

Correct Answer is: (a) Slide callipers only

Slide callipers can measure the external and internal diameters as well as the depth of a hollow cylinder. This is sufficient to find its volume, and hence density, since mass is known.