Question 22
PressureMercury is suitable as a barometric fluid because it
- A.expands uniformly
- B.is opaque
- C.is several times denser than water
- D.is a good conductor of heat.
Show the answer and explanation
Answer: C (is several times denser than water)
Explanation
Mercury's high density means atmospheric pressure supports only about 76 cm of it, a convenient length; water would need over 10 m.