Because mass is not always the same for objects made from the same material. Just because an object has the same mass as another doesn’t mean they are the same material.
Answer:
A) m = 
B) m = 
Explanation:
A) a process at the constant external pressure Pf,
We Know that
W = mgh-------------------------(1)
W=
---------------------------(2)
Equating (1) and(2)
mgh =
=
Therefore m =
B)In a irreversible process
W = mgh----------------------(3)
---------------------(4)
PV =nRT
P =
W =
W= 
W=
W=
From EQ(3)
mgh=
m =
Answer: The correct answer is option(4).
Explanation:
Malleability : It is a property of a material that under the pressure they can be drawn into thin sheets.
Conducting: It is a property of a material to allow electric current to easily pass through it.
Since both the above properties are of metals. And from the enlisted elements only one element is metal that is 'silver'.
So, the correct answer is option(4).
B. False (makes water as well)
