Question

11) what is the commercial unit of energy ?
12) what is the relationship between the commercial unit and si unit ?
13) calculate the work done against the gravity?

Answer 1

$$\begin{gathered} Dearstudent, \\ i)commercialunitofenergyisKWhi.ekilowatthour \\ ii)1KWh=1000\times 3600=3.6\times {10}^{6}J \\ iii)workdoneagainstgravity=F\times displacement=m\times g\times h \\ hence, \\ W=mgh \\ Regards \end{gathered}$$