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goli12
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Homework Statement
A scientist wants to life 1000kg equipment tot the top of the hill he is working on, a rise of 50 metres. He sets up a solar energy system with parabolic mirrors that collects sunlight and warms his working fluid to 120°C (the working fluid does not freeze and does not biol in the temperature range over which it is being used). The exhaust temperature is -20°C. What is the minimum amount of energy required to heat his working fluid and run his engine to lift the mass?
Homework Equations
E=mgh
The Attempt at a Solution
Energy required to lift mass=1000*50*9.81=490500J
W=Q(hot)-Q(cold)=E(required to lift mass)+E(required to warm working fluid to 120°C)