An engine takes in 2400 J of heat, and rejects 1880 J of heat into the air. What is the efficiency of the engine? (No Unit)
1 answer:
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Answer:
Explanation:
Given
Volume of fixed chamber
Initial Temperature
Final Temperature
Heat Supplied
From First law of thermodynamics
Change in internal energy of the system is equal to heat added minus work done by the system
as the volume is fixed therefore work
thus
for mono-atomic gas is
and 1 mole contains
thus No of molecules
No of molecules
Answer
given,
length of bar = 80 cm
mass of the bar = 10 kg
smaller mass = 4 kg
distance = 20 cm
taking moment about B
difference between two scale = 8 - 6
= 2 N