What percent of the Earth\'s radius is 20 kilometers? The major gases that compr

Question

What percent of the Earth's radius is 20 kilometers? The major gases that comprise the Earth's atmosphere are shown in Table below. The properties of the gases (ignoring water vapor, which is variable) in the atmosphere remain virtually constant to a high of about 25km. At sea level, the weight of 1 cm^2 of air is approximately 1 kilogram. This value, 1 kg/cm^2 is also known as the atmospheric pressure. For this analysis, we will assume a featureless Earth without continents. This will simplify but not significantly alters your calculations. Question 2: How much does the atmosphere weigh over each square meter of surface? Express this in tonnes (units of 1000 kg). Recall the conversion factors: 10^4 cm^2 I m^2 1 tonne- 1000 kg-10^6 g

Explanation / Answer

1) (20 km/Earth's radius)*100

(20/ 6,378)*100 = 0.3136 %

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