## Essential University Physics: Volume 1 (3rd Edition)

We know 0 Celsius is 273.15 degrees Kelvin. Thus: $e_{water_{max}}=1 - \frac{273}{570}=52.1$% We know 25 Celsius is 298.15 degrees Kelvin. Thus: $e_{summer_{max}}=1 - \frac{298.5}{570}=47.6$%