Question

Length of a metal rod at temperature 27 °C is 4.256 m. Find the temperature at which the length of the
rod increases to 4.268 (for iron = 1.2 x 10-5 k-1)​

Answer 1

$\huge\star\underline\mathbb{HELLO}$

$<marquee behaviour="side" direction="down" style="background:pink" >$:

In this case, l= 0.5 m

dl=2.7 mm = 27X 10

−4

m

α=90 X10

−6

dt=dl/(lX α) =(3/5) ×10

2

Since the initial temperature is 0 degree, the final temperature will be 60 degree centigrade.