29.
P' : P = eσAT'⁴ : eσAT⁴
P' : P = T'⁴ : T⁴
P' : 20 = 500⁴ : 400⁴
P'/20 = (5/4)⁴
P' = 20 . 625/256
P' = 48,8
P' = 49 watt
Jawaban . C
31.
Pa : Pb = eσAaTa⁴ : eσAbTb⁴
Pa : Pb = AaTa⁴ : AbTb⁴
Pa : Pb = 2πRa².(2Tb)⁴ : 2πRb².Tb⁴ ......... A = 2πR² ..luas bola
Pa : Pb = Ra².(2Tb)⁴ : Rb².Tb⁴
Pa : Pb = (2Rb)². 2⁴.Tb⁴ : Rb².Tb⁴
Pa : Pb = 2².Rb². 2⁴.Tb⁴ : Rb².Tb⁴
Pa : Pb = 2². 2⁴ : 1
Pa : Pb = 64 : 1
Jawaban. E
33.
P = eσAT⁴
Q/t = eσAT⁴
Q = eσAT⁴t
Q' : Q = eσAT⁴t' : eσAT⁴t
Q' : Q = T'⁴t' : T⁴t
1 : 1 = (1,5T)⁴.t' : T⁴.81
1 = 1,5⁴. t' : 81
t' = 81/1,5⁴ = 81 . 16/81 = 16 menit
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29.
P' : P = eσAT'⁴ : eσAT⁴
P' : P = T'⁴ : T⁴
P' : 20 = 500⁴ : 400⁴
P'/20 = (5/4)⁴
P' = 20 . 625/256
P' = 48,8
P' = 49 watt
Jawaban . C
31.
Pa : Pb = eσAaTa⁴ : eσAbTb⁴
Pa : Pb = AaTa⁴ : AbTb⁴
Pa : Pb = 2πRa².(2Tb)⁴ : 2πRb².Tb⁴ ......... A = 2πR² ..luas bola
Pa : Pb = Ra².(2Tb)⁴ : Rb².Tb⁴
Pa : Pb = (2Rb)². 2⁴.Tb⁴ : Rb².Tb⁴
Pa : Pb = 2².Rb². 2⁴.Tb⁴ : Rb².Tb⁴
Pa : Pb = 2². 2⁴ : 1
Pa : Pb = 64 : 1
Jawaban. E
33.
P = eσAT⁴
Q/t = eσAT⁴
Q = eσAT⁴t
Q' : Q = eσAT⁴t' : eσAT⁴t
Q' : Q = T'⁴t' : T⁴t
1 : 1 = (1,5T)⁴.t' : T⁴.81
1 = 1,5⁴. t' : 81
t' = 81/1,5⁴ = 81 . 16/81 = 16 menit
Jawaban. E