For a floating body, its weight w and upthrust FB on it are related as
W > FB
W < FB
W = FB
Nothing can be said
The unit torr is related to the barometric height as
1 torr = 1 cm of Hg
1 torr = 0.76 m of Hg
1 torr = 1mm of Hg
1 torr = 1m of Hg
SI unit of upthrust is
Pa
N
Kg
Kgm2
Which of the following device is used to check the purity of milk?
Hydrometer
Lactometer
Barometer
None of these
Density of substance decrease when temperature
increases
decreases
no change
1st increase then decrease
The SI unit of thrust is
dyne
m
Nm
A hydrometer is used to measure the following quantity of a liquid.
Mass
Volume
Relative density
Density
Large the area on which a thrust acts, the pressure exerted on it will be
equal
less
more
very large
The narrow stem in hydrometer
Increase its sensitivity
Increase upthrust on it
Raises its centre of gravity
Increase its size
Find out correct expression.
