It is a gas.
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Yes, it is.
20 degrees Celsius = 68 degrees Fahrenheit Formula: [°F] = [°C] × 1.8 + 32
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20°C
The temperature difference between -20°C and 40°C can be calculated by subtracting the lower temperature from the higher one. This gives us 40°C - (-20°C) = 40°C + 20°C = 60°C. Therefore, there are 60 degrees between -20°C and 40°C.