энергия физика

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  • 1. - : . 8 .,2013

2. ? ? ? ? ? 3. ? () , , . 4. ? (,J) . 1889 .1 () = 100 1 () = 1 000 1 () = 1 000 000 1 () = 0.1 1 () = 0.01 1 () = 0.001 5. ? ..(1818-1889) , . : , ,... 2 . 97 . 6. 7. , . = (mV2) 2 8. .: :m = 2 = (mV2) 2V = 18/ 5/ = (2(5/)2) 2=E - ?= 25 18 /: = 25., 2 . 9. , . E = mgh 10. : C: = 600 600 000 = mgh =>,g = 10/2 h = (mg)=m = 2 2 000 600 000 h-? (2 000 10/2)=2 , =30 600 : h = 30 11. . ( = + ). . , 3 7.2/ . 20. . : :m = 20 0.02 = + => mgh + (mV2) 2 =>h = 3=> m(gh + V2 2)V = 7.2/ 2/ = 0.02(10/2 3 + (2/)2 2) =g = 10/2 = 0.64-?: = 0.64 12. . , ,, .. 13. 7 ..,... 7-9 .., ... :http://www.greensource.ru/http://www.wikipedia.org/