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September 6, 2021 21:04
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Modern Thermodynamics
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| sage: g = 9.8*units.length.meter/(units.time.second^2); | |
| ....: h = 10*units.length.meter; | |
| ....: cw = 4.1868*units.energy.joule/(units.temperature.celsius*units.mass.gram);t = g*h/cw | |
| sage: t | |
| 23.4068978694946*celsius*gram*meter^2/(joule*second^2) | |
| sage: tt = t/(units.temperature.celsius) | |
| sage: tt.convert() | |
| 0.0234068978694946 |
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problem 1.11
sage: torque = 200units.force.newtonunits.length.meter
sage: rpm = 2pi4000/(units.time.minute)
sage: power = torquerpm
sage: power.convert(units.power.horsepower)
(4000000000000000000/111854980737340533pi)horsepower
sage: n((4000000000000000000/111854980737340533pi))
112.345203865957
sage: power.convert(units.power.watt)
(80000/3*pi)watt
sage: n((80000/3pi))
83775.8040957278