Przelicz jednostki: a) 1200 Ws = ______ J b) 10,8 MJ = ______kWH c) 0,2 kWh = ______ J d) 25 kWh = ______ MJ

a) 1200 Ws = 1200 J b) 10,8 MJ = 10800000Ws=10800kWs/3600kWH=3kWh                               (k czyli 10^3) c) 0,2 kWh =200Wh=200W*1h= 200W*3600s=720000Ws=0,72MJ d) 25 kWh =25000Wh=25000*3600Ws=90000000J=90MJ                              (M czyli 10^6)

1 J = 1 W · 1 s 1 kJ = 1000 J 1 MJ = 1 000 000 J  1 kW = 1000 W 1 kWh = 1 kW · 1 h = 1000 W · 3600 s = 3 600 000 J   a) 1200 Ws = 1200 J b) 10,8 MJ = 10,8 · 1000000J/(1/3600000 kWh) = 3 kWh c) 0,2 kWh = 0,2 · 3600000J = 720 000 J d) 25 kWh = 25 · 3600000J = 90 000 000 J = 90 MJ