Which of the following is the lightest one?
a) copper
b) mercury
c) aluminum
d) lead
Explanation: a) copper = 8960 Kg/m3
b) mercury=13600 Kg/m3
c) aluminum=2710 Kg/m3 d) lead=11343Kg/m3
What should be the approximate length of glass tube
to construct a water barometer?
a) 0.5m
b) 1m
c) 2.5m
d) 11m
The density of a substance can be found with the help
of ………
a) Pascal’s law
b) Archimedes law
c) Boyle law
d) hooks law
Explanation: Archimedes principle is also helpful to
determine the density of an object
