Q. Two solid pieces, one of steel and the other of aluminum when immersed completely in water have equal weights. When the solid pieces are weighed in air
A) the weight of aluminium is half the weight of steel
B) steel piece will weigh more
C) they have the same weight
D) aluminium piece will weigh more
Explanation
(a) In air, force of gravity acts on metals. Thus, these have their actual weight. Atomic weight of steel, ie, iron is 56 and that of aluminium is 27. Hence, it can be said that in air the weight of aluminium is half the weight of steel.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.