"Einstein gave the famous mass energy equivalence relation `E=mc^2`."Describe.

What do you mean by mass-energy equivalence? Give example

In the set of integers Z, exmine whether the following relations are equivalence relations or not : R={(a,b) : a,b in Z and a^2=b^2}

In the set of integers Z, exmine whether the following relations are equivalence relations or not : R={(a,b) : a,b in Z} and a-b is divisible by 2.

Express 16 mg mass into equivalent energy in electron volt.

What is meant by mass energy equivalence? Discuss its significance in Physics.

Show that the relation R defined in the set A of all polygons are as R = {(P_1,P_2) : P_1, P_2 in A} P_1 and P_2 have same number of sides is an equivalence relation. What is the set of elements in A which are related to the rectangle having sides 4 and 5 cm?