ency Of An Eng C 7. An Approximate Equa An x . y How do you set up \"sqa cture.c

Question

ency Of An Eng C 7. An Approximate Equa An x . y How do you set up "sqa cture.com/courses/72932/discussion_topics/1068026 This is a graded discussion: 100 points possible due Module 8-Discussion: Application PIN Problems The Efficiency of an Engine OTTO CYCLE EFFICIENCY 07 An approximate equation for the efficiency E (in percent) of an engine is: 5-100 . (1-_ where R is the compression ratio. Find R if E-4(a),.(e [d]. Round the answer to two decimal places Work this cu learned in this module. ic functions using the techniques you Unread Subscribed Reply Control music play navigate images hand gestures boack andd 73

Explanation / Answer

E = 100 ( 1 - 1 / 5th root (R^2 ))

plugging E = 4

4 = 100 ( 1 - 1 / 5th root (R^2 ))

dividing both sides by 100

4/100 = ( 1 - 1 / 5th root (R^2 ))

.04 -1 =  - 1 / 5th root (R^2 )

(.96)^5 = 1/ R^2

.903 = 1/ R

R = 1.11

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