Question

Which of the following represent correct values for the normal atmospheric pressure?
A) 101.3 kilopascals
B) 76 mm of mercury
C) 101.3 pascals
D) 76 cm of mercury
A. A and B
B. B and C
C. A and D
D. B and D

Answer 1

Answer:

c . A&D

Explanation:

because 101.3 kilopascals = 76cm of mercury

Answer 2

C. A and D -- 101.3 kilopascals or 76 cm of mercury

Explanation:

Atmospheric pressure is the pressure exerted by the atmosphere, or rather the weight of air above a point on Earth. It can be measured using a barometer. The unit of pressure is Pascals. (pascal = Newton per square metre) As we go to a higher altitude on Earth, the weight of air above it decreases, so the pressure will also be lesser. So atmospheric pressure decreases with increasing elevation.

Atmospheric pressure is measured using a barometer. At sea level, the barometer will read a value of standard or normal atmospheric pressure, equivalent to the pressure exerted by 760 mm tall column of mercury or 101.3 KPa.

Option C is the answer.