Question

oblicz : 1kWh=....J

0.08kWh=....J

zad. ile kosztuje 1J energii elektrycznej ? przyjmij cene : 50gr za 1kWh.

Prosze help !

Answer 1

a)   1 kWh = 1000 Wh = 1000·3600Ws = 3 600 000 J

 

1 kWh = 3 600 kJ

1 kWh = 3,6 MJ

 

b)

     1 kWh ----- 3600000 J

0,08 kWh -----    x J

--------------------------------

x = 0,08kWh·3600000J/1kWh

x = 288 000 J

===========

 

Zad.

1 J = 1Ws = 0,001kWs = 0,001kW·(1/3600)h = 0,000000277 kWh ≈ 0,00000028 kWh

 

              1 kWh -----  50 gr 

0,00000028 kWh -----   x gr

------------------------------------

x = 0,00000028kWh·50gr/1kWh

x = 0,000014 gr 

x = 0,00000014 zł