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Author Question: The earliest thermometers were based on: A) The expansion and contraction of a spiral piece of ... (Read 19 times)

Pineapplelove6

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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.


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duke02

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Reply #1 on: Jul 26, 2018
Answer to Question 1

D

Answer to Question 2

C


Pineapplelove6

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Reply 2 on: Jul 26, 2018
Thanks for the timely response, appreciate it

tkempin

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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