Download App

Force and Pressure — Science STD 8 — Question

Maharashtra BoardEnglish MediumSTD 8ScienceForce and Pressure1 Mark
MCQ
Which of the following represent correct values for the normal atmospheric pressure?
  • A
    $101.3$ kilopascals and $76\ mm$ of mercury.
  • B
    $76\ mm$ of mercury and $101.3 $ pascals.
  • ✓
    $101.3$ kilopascals and $76\ cm$ of mercury.
  • D
    $76\ mm$ of mercury and $76\ cm$ of mercury.
✓

Answer

Correct option: C.
$101.3$ kilopascals and $76\ cm$ of mercury.
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.
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 $760\ mm$ or $76\ cm,$ tall column of mercury or $101.3$ kilopascals.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "MCQ" from Force and Pressure→Force and Pressure — all question types→Science STD 8 question papers→Maharashtra Board STD 8 question papers→Maharashtra Board question paper generator→

Similar questions

Which of the following is NOT a symptom of a heart attack?
→
A glowing filament will be:
→
If current does not flow through a circuit, then it is said to be an.
→
The nucleus of an atom contains 19 protons and 21 neutrons. The atomic mass number of the element is ………….. .
→
Which of the following is not a synthetic fibre?
→
When a rubber sucker is pressed on a plane surface than it sticks to the surface because of :
→
To which category of micro-organisms do the following belong?
Amoeba, Lactobacillus, Chlamydomonas, Penicillium, Yeast, HIV.
→
A tadpole develops into an adult frog by the process of:
→
The man$-$made fibre rayon is chemically identical to:
→
Which of the following precautions need not be taken while using electric gadgets$/$ appliances$/$ circuit?
→