4. a) What is the rms speed of a helium atom in the earth's atmosphere at room temperature (27° C)? b) Compare this to t

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4 A What Is The Rms Speed Of A Helium Atom In The Earth S Atmosphere At Room Temperature 27 C B Compare This To T 1 (134.6 KiB) Viewed 48 times

4. a) What is the rms speed of a helium atom in the earth's atmosphere at room temperature (27° C)? b) Compare this to the rms speed of an oxygen molecule (O2) at the same temperature. 2Gmarth Vesc = c) If the escape velocity of the Earth is given by earth , compare these speeds to the Earth's escape velocity. d) Why do you think the earth has little or no helium in its atmosphere? (Think about the speeds you found for helium and oxygen.) 5. Pressure is force per unit area. (Recall that Fat = Ap) In a period of 1.0 seconds, 5.0 x 1023 nitrogen molecules strike a wall of area 8.0 cm². If the molecules move at 300 m/s and strike the wall head on in a perfectly elastic collision, find the pressure exerted on the wall. (The mass of one N2 molecule is 4.68 x 10-26 kg.) What is the temperature of the gas?