1、 2015-2016 1 10g J 4.6 10 7 J/kg 2 10kg 50 J kg c =4.2 10 3 J/ kg q =7 l0 7 J/kg 3 L 1 L 2 4 S 2 5 S 1 S 2 L 1 L 2 S 2 L 2 “ ” “ ” “ ” 6 P 7 3V S 1.2A 0.3A R 1 A R 2 8 R 1 R 2 10 2 0 S 1 S 2 6V S 1 S 2 V 9 A B C D 10 A B C D 11 A B 0 0 C D 12 A B C D 13 S A B C D 14 S L 1 L 2 A L 2 B L 2 C L 1 D 15
2、A S 1 S 3 S 2 L 1 L 2 B S 2 S l S 3 L 1 L 2 C S 1 S 2 S 3 L 1 L 2 D S 1 S 2 S 3 16 A B C L 1 D L 217 S P a A B C D 18 S 0.8 S 0.5 R 1 R 2 A 13 5 B 3 5 C 5 3 D 5 13 19 A B C “ ” D 20 A B A B C D 21 S L 1 L 2 A L 1 B L 1 C L 2 D L 2 22 R 10 S P a 0.6A P b 0.2A A 6V B 20 C P 0.3A D P b 4V 23 1 2 24 25
3、26 L 1 L 2 L 1 L 2 0.5A 27 “ ” A B C D E F G m 1.0 0.5 1.5 1.0 1.2 1.5 0.5 2 3.2 0.8 1.2 0.8 1.2 1.2 1.2 1 C 2 C 3 A 4 1m 1 2 20 R / 0.016 0.017 0.027 0.052 0.096 0.44 1.1 28 7.5 R X 1 2 3 1 B 4 2 U/V I/A R / R / 1 2 0.26 7.69 R X = 2 3 0.40 7.50 3 5 6 29 50kg 20 60 0.8kg q=4.2 10 7 J/kg c=4.2 10 3
4、J/ kg 1 50kg 20 60 2 0.8kg 3 30 S 4V 0.4A S 6V 1 R 1 R 2 2 2015-2016 1 10g 4.6 10 5J 4.6 10 7 J/kg 1 2 Q =mq 3 1 2 Q =mq=0.01kg 4.6 10 7 J/kg=4.6 10 5 J 3 4.6 10 5 2 10kg 50 2.1 10 6J 0.03 kg c =4.2 10 3 J/ kg q =7 l0 7 J/kg 1 2 3 4 1 2 3 Q =cm t=4.2 10 3 J/ kg 10kg 50 =2.1 10 6 J 4 Q =Q = m q m =0.03kg 2.1 10 6 0.03 3 S 1 S 2 L 1 L 2 S 1 S 3 L A L B S 1 S 2 L A L B S 1 S 3 S 1 S 2 S 1 S 3 4 S 2 L 2 S 2 S 1 L 1 L 2 S 2 S 2 L 2 S 2 L 2 L 2 5 S 1 S 2 L 1 L 2 S 2 L 2 “ ” “ ” “ ” S 1 S 2 L 1 L 2 S 2 L 2 S 2 L 2 6 P R 1 R 2 R 1 R 2 P
