Question

A brass wire of radius 1mm is loaded by a mass of 31.42 kg what would be the decreases in its radius? If Y =9×10^10​

Answer 1

Answer:

At 40º C, a brass wire of 1 mm radius is hung from the ceiling. A small mass, M is hung from the free end of the wire. When the wire is cooled down from 40ºC to 20ºC it regains its original length of 0.2 m. The value of M is close to : (Coefficient of linear expansion and Young’s modulus of brass are 10–5 /°C and 1011 N/m2 , respectively; g= 10 ms–2 )Read more on Sarthaks.com - https://www.sarthaks.com/364200/40-brass-wire-radius-is-hung-from-the-ceiling-small-mass-is-hung-from-the-free-end-of-the-wire