Question

An Aluminium rod of length 50 cm is heated so that its temperature increases from 20°C to 80°C. If the
linear coefficient of expansion of aluminium is 24 x 10-7°C. The increase in the length of the aluminium
rod is
a) 7.2 x 104 cm b) 7.2 x 10 cm
17.2 x 10 cm d) 7.2 cm
* 10cm
72 x 10-cm
.) 7.2 cm
C
LA
TI
Giant of volume expansion​

Answer 1

Answer:

a

Explanation:

Answer 2

Answer:

linear coeff= ∆l/L1*∆t

24*10^-7=∆l/50*(80-20)

∆l=50*60*24*10^-7

∆l=3000*24*10^-7

∆l=72*10^-4cm.