Author Question: The earliest thermometers were based on: A) The expansion and contraction of a spiral piece of ... (Read 36 times)

Pineapplelove6 · **on:** Jul 26, 2018

The earliest thermometers were based on:

A) The expansion and contraction of a spiral piece of metal.
B) The position of the sun casting shadows.
C) The expansion of a fluid trapped inside a glass tube.
D) The expansion and contraction of air trapped in a tube above a column of liquid.

Question 2

Valves that use motors that move in tiny increments are:

A) Cross charged expansion valves. B) Pulse modulated valves.
C) Stepper motor valves. D) Electronic expansion valves.