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Three Carnot engines operate in series between a heat source at a temperature T_1 = 600 K and heat sink at temperature T_4 = 100K (see figure). There are two other reservoirs at temperature T_2 " and " T_3 as shown, with T_1 gt T_2 gt T_3 gt T_4 The three engines are equally efficient if:

In the adjoining figure, PM = 4.8, MR = 2.4, QN = 5.4, NR = 3.6. State with reason whether seg MN is Parallel to side PQ or not?

In a certain code language, 'Thin paper neatly folded' is written as @ D6, % R5, !N4, ?Y6 'Four people from USA' is written as @M4, %E6, #A3, @R4 'Urban development programme launched' is written as %E9, *T11, #N5 & D8 'Dhaya likes forties hero' is written as @ S7, & S5, *A5, $O4 The code '*A5' denotes which of the following word ?

In a certain code language, 'Thin paper neatly folded' is written as @ D6, % R5, !N4, ?Y6 'Four people from USA' is written as @M4, %E6, #A3, @R4 'Urban development programme launched' is written as %E9, *T11, #N5 & D8 'Dhaya likes forties hero' is written as @ S7, & S5, *A5, $O4 The code word of 'Four' is

In a certain code language, 'Thin paper neatly folded' is written as @ D6, % R5, !N4, ?Y6 'Four people from USA' is written as @M4, %E6, #A3, @R4 'Urban development programme launched' is written as %E9, *T11, #N5 & D8 'Dhaya likes forties hero' is written as @ S7, & S5, *A5, $O4 The code for the word 'People' is

In a certain code language, 'Thin paper neatly folded' is written as @ D6, % R5, !N4, ?Y6 'Four people from USA' is written as @M4, %E6, #A3, @R4 'Urban development programme launched' is written as %E9, *T11, #N5 & D8 'Dhaya likes forties hero' is written as @ S7, & S5, *A5, $O4 '#' denotes which letter of the given words ?