Elements are: A) The forces of velocity pressure and density ...

[sarasara]

Elements are:
 
  A) The forces of velocity pressure and density upon a substance.
  B) Pressure and temperature.
  C) Naturally occurring chemicals.
  D) Force and pressure.

Question 2

An advantage of open-drive compressors is that:
 
  A) They are generally less expensive than comparable semihermetic compressors.
  B) The motor and compressor can be replaced separately.
  C) They require no type of regular maintenance.
  D) They are smaller and more compact than hermetic compressors.

[Carliemb17]

Answer to Question 1

C

Answer to Question 2

B

[sarasara]

Thanks for the timely response, appreciate it

[dyrone]

Great answer, keep it coming