In mercury barometer any change in the height of the column of mercury means that the……… has changed.
a) density
b) pressure
c) weight
d) atmospheric pressure
In barometer the mercury is used instead of water because……….
a) water is less dense than mercury
b) mercury is less dense than water
c) water is more dense than mercury
d) both have same density
Mercury is ……times than water.
a) 13.6
b) 14.6
c) 15.6
d) 16.6
Explanation: atmospheric pressure can hold vertical column of water about 13.6 times the height of mercury column at a place.
At sea level the vertical height of water column in barometer would be…….
a) 10.34m
b) 11.34m
c) 12.34m
d) 9.34m
Explanation: To make a water barometer a glass tube more than 10m long is required.
Atmospheric Pressure And Weather:
The atmospheric pressure…..as we go up.
a) decreases
b) increases
c) constant
d) none of these
