Calculate the R value of (a) a window made of a single pane of flat glass in thick, and (b) A thermal window made of two single panes each in thick and separated by a in air space (c) By what factor is the transfer of energy by heat through the window reduced by using the thermal window instead of the single pane window

Question: Calculate the R value of (a) a window made of a single pane of flat glass in. thick, and (b) A thermal window made of

Calculate the R value of
(a) a window made of a single pane of flat glass ⅛ in. thick, and
(b) A thermal window made of two single panes each ⅛ in. thick and separated by a ¼ in air space.
(c) By what factor is the transfer of energy by heat through the window reduced by using the thermal window instead of the single pane window?

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