Engine 1 has an efficiency of 0.18 and requires 5500 J ofinput heat to perform a certain amount of work. Engine 2 hasan efficiency of 0.26 and performs the same amount of work. How much input heat does the second engine require?

The input energy to  engine 2  is

Explanation:

From the question we are told that

     The efficiency of engine one is  

     The input energy required is

       The efficiency of engine 2 is

Generally the workdone by the engine 1  is mathematically represented as

=>    

=>    

Generally the workdone by engine 2  is mathematically represented as  

=>    

=>    

From the question we are told that

So  

=>    

second mirror gathers light from a faraway object and reflects it to another mirror. - a.