A) To find the formula connecting R to E, we first need to determine the constant part and the part that varies with E. From the given values of R and E:
1) When R = 530 and E = 1600:
R = C + k*E
530 = C + k*1600
2) When R = 730 and E = 3600:
R = C + k*E
730 = C + k*3600
Solving these two equations simultaneously, we get:
C = 1145 and k = -0.05
Therefore, the formula connecting R to E is:
R = 1145 - 0.05*E
B) To find R when E = 1300, we substitute E = 1300 into the formula we found in part A:
R = 1145 - 0.05*1300
R = 1145 - 65
R = 1080
Therefore, when E = 1300, R = 1080.
R is partly constant and partly varies with E when R=530 ans E=1600 and when R=730 and E=3600.
A) find the formula which connects R to E
B) find R when E=1300
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2 answers