In a high-intensity xenon-krypton discharge lamp, the krypton fill gas reaches an operating temperature of 2400 K2400 \text{ K}2400 K. The average mass of a krypton atom is 1.4×10−25 kg1.4 \times 10^{-25} \text{ kg}1.4×10−25 kg.
What is the mean square speed of the krypton atoms at this temperature?
[Boltzmann constant kB=1.38×10−23 J K−1k_B = 1.38 \times 10^{-23} \text{ J K}^{-1}kB=1.38×10−23 J K−1]
2.4imes105 m2 s−22.4 imes 10^5 \text{ m}^2 \text{ s}^{-2}2.4imes105 m2 s−2
3.6imes105 m2 s−23.6 imes 10^5 \text{ m}^2 \text{ s}^{-2}3.6imes105 m2 s−2
4.7imes105 m2 s−24.7 imes 10^5 \text{ m}^2 \text{ s}^{-2}4.7imes105 m2 s−2
7.1imes105 m2 s−27.1 imes 10^5 \text{ m}^2 \text{ s}^{-2}7.1imes105 m2 s−2
