Answer:
So the ratio will be 
Explanation:
We have given heat engine absorbs 450 joule from high temperature reservoir
So 
As the heat engine expels 290 j
So work done W = 290 J
We know that efficiency 
It is given that efficiency of the engine only 55 % of Carnot engine
So efficiency of Carnot engine 
Efficiency of Carnot engine is 


Answer:
15 less mins will be used by Bob
Explanation:
This is because it takes Tim 2000/50= 40mins to type the whole work
While it takes Bob 2000/80= 25 mins
So the difference 40-25= 15mins
Will be 15mins
C is incorrect because the atomic number and symbol are the only ones displayed.
I think it could be A but it is most likely C
Hope it helps!!
Answer:
<em><u>TROPOSPHERE</u></em><em><u> </u></em><em>the</em><em> </em><em>lowest</em><em> </em><em>layer</em><em> </em><em>of</em><em> </em><em>the</em><em> </em><em>atmosphere</em><em> </em><em>closest</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>earth</em>
<em><u>STRATOSPHERE</u></em><em><u> </u></em><em>constant</em><em> </em><em>temperature</em><em> </em>
<em>MESOSPHERE</em><em> </em><em>layer</em><em> </em><em>with</em><em> </em><em>the</em><em> </em><em>strongest</em><em> </em><em>wind</em><em> </em><em>and</em><em> </em><em>below</em><em> </em><em>the</em><em> </em><em>themosphere</em>
<em><u>Themosphere</u></em><em><u> </u></em><em>a</em><em>bsorbs</em><em> </em><em>UV</em><em> </em><em>radiation</em><em> </em>