(b) A diver practicing how to swim in a swimming pool takes enough air from his tank to fully expand his lungs before abandoning the tank at depth L and swimming to the surface, failing to exhale during his ascent. At the surface, the difference between the external pressure on him and the air pressure in his lungs is 10.3 kPa. From what depth did he start? Take the density of water to be 998 kg/m³ and acceleration due to gravityg %3D 9.8 m/s?.

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Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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Q1(a) A Carnot engine absorbs 925J of heat from a reservoir at 130K and does
some work, and discards some heat to a reservoir at 75K.
(i) How much work does it do?
[3]
(ii) How much heat is discarded?
[3]
(ii) What is the Efficiency of the system?
[3]
(b) A diver practicing how to swim in a swimming pool takes enough air from
his tank to fully expand his lungs before abandoning the tank at depth L
and swimming to the surface, failing to exhale during his ascent. At the
surface, the difference between the external pressure on him and the air
pressure in his lungs is 10.3 kPa. From what depth did he start? Take
the density of water to be 998 kg/m³ and acceleration due to gravityg =
9.8 m/s?.
[11]
Transcribed Image Text:Q1(a) A Carnot engine absorbs 925J of heat from a reservoir at 130K and does some work, and discards some heat to a reservoir at 75K. (i) How much work does it do? [3] (ii) How much heat is discarded? [3] (ii) What is the Efficiency of the system? [3] (b) A diver practicing how to swim in a swimming pool takes enough air from his tank to fully expand his lungs before abandoning the tank at depth L and swimming to the surface, failing to exhale during his ascent. At the surface, the difference between the external pressure on him and the air pressure in his lungs is 10.3 kPa. From what depth did he start? Take the density of water to be 998 kg/m³ and acceleration due to gravityg = 9.8 m/s?. [11]
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