... 2324J. 8.5: 14 54W. 8.6: 72J. 8.7: 15 0J; 90 J. 8.8: 2,7kg; 25%. 8 .9: 6, 21. 10 21 J. Chng 9: 9 .1: b) Fd = 2,3 .10 39 Fhd. 9. 2 = 4 .10 16 rad/s; v = 2,2 .10 6 m/s. 9. 3: thiu 1, 25 .10 13 electron. ... 42m. 1. 18: b) t = 1/ ; =2rs0. 1. 19: = sin20. 1. 20: 30tb=. 1. 21: s = 85m. 1. 22: t 1 = 0, 894 s; t 10 = 0 ,14 5s. 1. 23: s = At. 1. 24: a) = 3 ,14 rad/s; b) v = 1, 02 m/s; at = 1, 02 ... electron. 9. 4: 1 21 2 21 2Fqq4)qq(F+=. 9. 5: 7mgtgq sin 1, 1 .10 Ck= =. 9. 6: a) 1, 35 .10 5 V/m; b) 3 ,1. 10 4 V/m; c) 1, 92 .10 4V/m; d) 1, 5 .10 4V/m; e) AN = 20cm, BN = 40cm. 9. 7:...