In the spring, when the air temperature is 100 C , the length of the bridge is 1
ID: 1474972 • Letter: I
Question
In the spring, when the air temperature is 100 C , the length of the bridge is 160.0 m. Answer the questions below knowing that the value of for gold is 1.42×105C1.
a) Compared to its length in the spring, by what amount Lwinter does the length of the bridge decrease during the Teharian winter when the temperature hovers around -150C?
b) Compared to its length in the spring, by what amount Lsummer does the length of the bridge increase during the Teharian summer when the temperature hovers around 700C?
Explanation / Answer
A)
change in temparature dT = -100-150 = -250 C
alpha = 1.42*10^-5 C-1
L = alpha*L*dT = -1.42*10^-5*160*250 = -0.568 m
B) change in temparature dT = 700-100 = 600 C
L = alpha*L*dT = 1.42*10^-5*160*600 =
change in temparature dT = -100-150 = -250 C
alpha = 1.42*10^-5 C-1
L = alpha*L*dT = -1.42*10^-5*160*250 = -0.568 m
B) change in temparature dT = 700-100 = 600 C
L = alpha*L*dT = 1.42*10^-5*160*600 = 1.3632 m