Can someone please help, I\'ve asked this like 4 times already but I keep gettin
ID: 1998783 • Letter: C
Question
Can someone please help, I've asked this like 4 times already but I keep getting the wrong answer, thanks!A bridge is made with segments of concrete 74 m long (at the original temperature). If the linear expansion coefficient is 1.2 × 105 (C)1, how much spacing is needed to allow for expansion for an increase in temperature of 66F?
Can someone please help, I've asked this like 4 times already but I keep getting the wrong answer, thanks!
A bridge is made with segments of concrete 74 m long (at the original temperature). If the linear expansion coefficient is 1.2 × 105 (C)1, how much spacing is needed to allow for expansion for an increase in temperature of 66F?
Can someone please help, I've asked this like 4 times already but I keep getting the wrong answer, thanks!
A bridge is made with segments of concrete 74 m long (at the original temperature). If the linear expansion coefficient is 1.2 × 105 (C)1, how much spacing is needed to allow for expansion for an increase in temperature of 66F?
Explanation / Answer
increase in temp, deltaT = 66 deg F = 19 deg C
L = Lo (1 + alpha deltaT )
L - Lo = deltaL = Lo alpha deltaT
deltaL = 74 x (1.2 x 10^-5) (19)
= 0.0167 m Or 1.67 cm
Spacing = 1.67 cm