A barometer reads 780 mm Hg. Mercury has a density of 1.36 x 10^4 kg /m^3. What is the pressure of the atmosphere in N / m^2? A

Question

A barometer reads 780 mm Hg. Mercury has a density of 1.36 x 10^4 kg /m^3.
What is the pressure of the atmosphere in N / m^2?
A 1.1 x 10^4 N/m^2
B 1.1 x 10^5 N/m^2
C 1.1 x 10^7 N/m^2
D 1.1 x 10^8 N/m^2
How do we get to the answer? According to the mark scheme, it’s B.

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Thu Nguyệt 3 years 2021-09-03T14:54:17+00:00 2 Answers 104 views 0

Answers ( )

  1. sori
    1
    2021-09-03T14:55:19+00:00
    Reply

    Answer:

    B

    Explanation:

    Pressure = density × g × height

    p \: = (1.36 \times {10}^{4} )(10)(780 \times {10}^{ - 3} ) \\ p = 1.1 \times {10}^{5}

  2. ThanhThu
    -1
    2021-09-03T14:55:31+00:00
    Reply

    The correct answer is A

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