Relate I kWh with 1 joule.

Define electron volt. Express it in Joule.

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?

If R={(1,2),(2,3)} is a relation in N, list the least number of ordered pairs to be included in R so that R is an equivalence relation.

A certain household has consumed 250 units of energy during a month. How much energy is this in joules?

What is 1kwh?

Write relation between watt. Joule and second.

Let L be the set of all lines in the XY - plane and R be the relation in L defined by R={(l_(i)l_(j))|l_(i)" is parallel to "l_(j)l_(i)AA_(i),j} . Show that R is an equivalence relation. Find the set of all lines related to the line y=7x+5