ÉîÒ¹ÑÇÖÞ¸£Àû¾Ã¾Ã

  1. UCC Home
  2. Electronic Journals, Books and Publications
  3. Understanding Physics
  4. Chapter 12 Microscopic models of thermal systems: kinetic theory of matter
  5. Chapter 12 problems
  6. Answers to Chapter 12 Problems

Answers to Chapter 12 Problems

 

12.1.1   28.8 J K–1   

12.1.2   1.30 × 1023 molecules

12.1.3   (a)  0.81 kg     (b)  466 m s–1

12.1.4   5/3;    2 × 105 N m–2

12.1.5   1.0 m

12.1.6   (a)  1.6 × 103  m s–1 (vesc=  1.1 × 104  m s–1)   (b) 8.6 × 103  m s–1  (vesc=  6.0 × 105  m s–1)    

12.1.7   5.1 × 104  m s–1;   â‰ˆ 105  K

12.1.8   1.49 J;    0.17 %

12.1.9   (a)  324 K    (b)  2426 J    (c)  3.23 ×104 Pa

12.2.1   829 J;    \( 5 \over 7  \)

12.5.1   (a)  1.6 Ã— 1011 rad s–1    (b)  8.8 × 10–32 J s

12.6.1   (a)  \( 3N \over V^3  \)    (b)   \(  \sqrt{3 \over 5} V  \)   (c)  \( 7N \over 8  \) 

12.6.2    10.6

12.6.3    (a)  1.22 × 104 m s−1     (b)  6.18 × 105 m s−1;  Pesc/Prms is proportional to e−3850.  Since the exponential factor is extremely small, we may conclude that it is extremely unlikely that a hydrogen atom will escape from the surface of the Sun. 

Understanding Physics

Contact us

Mansfield and O'Sullivan, Understanding Physics, 3rd ed., John Wiley & Sons, Chichester (2020),

Connect with us

Choose areas of the website to search
Top