Answer:
The value is 
Explanation:
From the question we are told that
The work input is 
The heat delivered is 
The value of A is A = 14
The value of B is B = 72
Generally the efficiency of the heat engine is mathematically represented as
Here 
is the total out energy produce by the heat engine and this is mathematically represented as
=> 
=> 
So
=> 
=> 
=>
Mechanical waves<span> require an initial </span>energy<span> force. Once this </span>energy<span> is added, the </span>wave<span> travels through the medium until all its </span>energy<span> is </span>transferred<span>. In contrast, electromagnetic </span>waves<span> require no medium, but can still travel through one.</span>
For the swimmer to go straight the sin component of his velocity should cancel the river velocity.
So, we have 
θ
This angle θ is the angle shall the swimmer point upstream from the shore.
0.32 = 0.85 sin[/tex]θ
θ = 
The velocity of swimmer across the river is given by cos componet of his velocity
v = 0.85 cosθ = 0.85 cos 22 = 0.79 m/s
