Answered: If the work done on a closed system is…

If the work done on a closed system is 20 kJ/kg. and 40 kJ/kg heat is rejected from the system, its internal energy decreases by (a) 20 kJkg (c) -20 kkg (b) 60 kJkg (d) -60 kJ/kg

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

Solve fast please...

If the work done on a closed system is 20 kJ/kg.
and 40 kJ/kg heat is rejected from the system,
its internal energy decreases by
(a) 20 kJ/kg
(c) -20 kkg
(b) 60 kJkg
(d) -60 kJ/kg

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A 16-cm x 20-cm gas engine has a normal speed of 450 rpm. Determine a.) the speed, in rev/s and rad/s; b.) the linear velocity of the crank pin, in cm/s and m/s. If the engine is allowed to stop at a uniform rate in 3 minutes and 20 seconds, determine c.) the deceleration of the crank, in rad/s²; d.) the distance, in cm, traveled by the crankpin in coming to rest; and e.) the distance, in cm, traveled by the piston in coming to rest.