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80 Fahrenheita = 26,(6) Celsjusza i ~ 300 Kelwina
500 Kelwinów = 226,85 Celsjusza i 440,33 Fahrenheita
20 st. C = 20 + 273 = 293 K
20 = 5/9 * (st.F - 32)
20 = 5/9* st.F - 160/9 / + 160/9
20 + 160/9 = 5/9* st.F
340/9 : 5/9 = st.F
st.F = 68
20 st. c = 68 st. F
b)
80 st. F
st. C = 5/9 * (80 st.F - 32)
st. C = 5/9 * 48
st. C = 26,(6)
80 st. F = 26,(6) st. C
26,(6) st. C + 273 = 299,(6) K
80 st. F = 299,(6) K
c)
500 K = 500 - 273 = 227 st. C
227 st. C = 5/9*st.F - 160/9
2203/9 = 5/9 st. F / :5/9
440,6 = st. F
500 K = 440,6 st. F