Bookmarks People Window Help 99%B1\" Sun 3:34 PM MasteringPhysics: Ch 19 HW Part

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Bookmarks People Window Help 99%B1" Sun 3:34 PM MasteringPhysics: Ch 19 HW Part2 Secure https://session.masteringphysics.com/my ct/itemview?a myct/itemView?assignmentProblemiD 78596744 rse.h Ch 19 HW Part2 Problem 19.21 PH previous 1 of 10 I next Problem 19.21 Assign Part A Inside a box, a 1.00-kg ball is gently launched from a height of 1.00 m (Figure 1). The box contains 1.00 mol of argon atoms, each having a mass of 6 63 × 10-26 kg and moving at an rms speed of 130 m/s before the ball is dropped. The ball rebounds elastically against the floor of the box, and so its energy is transferred only to the argon atoms. What is the average unergy of each argon atom before the ball is Express your answer with the appropriate units D B- 9.8 Submit My Answers Give Up Incorrect:; Try Again; 4 attempts remaining Figure 1 of 1 Part B After a long time interval has passed, the ball stops bouncing and rests on the box floor. What is the rms speed of the argon atoms now? Express your answer with the appropriate units. U. 132 Submit My Answers Give Up Correct 5, 1.00 kg 1.00 m

Explanation / Answer

average energy=1.5kT

vrms=sqrt(3kT/m)

we got T=(vrms)^2*m/3k=27.06 K

so we got energy=5.6*10^(-22) J

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