You’re interested in the intersection of physics and sports, and you recognize that many sporting events involve collisions—bat and baseball, foot and football, hockey stick and puck, basketball and floor. Using strobe photography, you embark on a study of such collisions. Figure 9.31 is your strobe photo of a ball bouncing off the floor. The ball is launched from a point near the top left of the photo and your camera then captures it undergoing three subsequent collisions with the floor. FIGURE 9.31 Passage Problems 94-97 Compared with the time between bounces, the duration of each collision is a. a tiny fraction of the time between bounces. b. a significant fraction of the time between bounces. c. much longer than the time between bounces.
You’re interested in the intersection of physics and sports, and you recognize that many sporting events involve collisions—bat and baseball, foot and football, hockey stick and puck, basketball and floor. Using strobe photography, you embark on a study of such collisions. Figure 9.31 is your strobe photo of a ball bouncing off the floor. The ball is launched from a point near the top left of the photo and your camera then captures it undergoing three subsequent collisions with the floor. FIGURE 9.31 Passage Problems 94-97 Compared with the time between bounces, the duration of each collision is a. a tiny fraction of the time between bounces. b. a significant fraction of the time between bounces. c. much longer than the time between bounces.
You’re interested in the intersection of physics and sports, and you recognize that many sporting events involve collisions—bat and baseball, foot and football, hockey stick and puck, basketball and floor. Using strobe photography, you embark on a study of such collisions. Figure 9.31 is your strobe photo of a ball bouncing off the floor. The ball is launched from a point near the top left of the photo and your camera then captures it undergoing three subsequent collisions with the floor.
FIGURE 9.31 Passage Problems 94-97
Compared with the time between bounces, the duration of each collision is
a. a tiny fraction of the time between bounces.
b. a significant fraction of the time between bounces.
A 11.8 L gas tank containing 3.90 moles of ideal
He gas at 26.0°C is placed inside a completely
evacuated insulated bell jar of volume 39.0 L .A
small hole in the tank allows the He to leak out into
the jar until the gas reaches a final equilibrium state
with no more leakage.
Part A
What is the change in entropy of this system due to the leaking of the gas?
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ΜΕ ΑΣΦ
AS =
?
J/K
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Part B
Is the process reversible or irreversible?
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