The escape velocity from the Earth is approximately 11.2 km/s. If the mass of helium atoms is 6.64 × 10^-27 kg, at what temperature would the average speed of helium atoms be equal to the escape velocity?

• A. 23,700 K
• B. 2.11 K
• C. 4.5 × 10^-42 K
• D. 3.9 × 10^-20 K