Question

happy valentines everyone <3 I dont want a partner i just want a crumb of future PLEASE "A steel bridge is 1000 m long at -20°C in winter. What is the change in length when the temperature rises to 40°C in summer? The average coefficient of linear expansion of this steel is 11 x 10-6 K-1. *

Answer 1

Answer :-

l2 = l1 (1 + α × change in temperature)

L1 = 1000m

Temperature 1 = -20

L2 = ?

Temperature 2 = 40

Temperature difference = 40 - (- 20)

40+20=60

Inserting into the formula

• l2 = l1 (1 + α × change in temperature)

• L² = 1000(1+11×10^-6 ×60)

• L² = 1000(1+6.6×10^-4)

• L² = 1000(1.000.66)

• L² = 1000.66m Ans.

Answer 2

1000.66m

Step-by-step explanation:

`l 2 = l1(1 + \alpha \: * change \:in \: temperature)`

L1=1000m

Temperature 1=-20

L2=?

Temperature 2=40

Temperature difference=40-(-20)

40+20=60

inserting into the formula

l2=l1(1+α×changeintemperature)

L2=1000(1+11×10^-6 ×60)

L2=1000(1+6.6×10^-4)

L2=1000(1.000.66)

L2=1000.66m