Question

15) Find the length of 3.3 kg of copper wire of radius 2 mm, given that specific density of copper is 8.4gm/cm?​

Answer 1

3.3kg Copper =3300g

volume 3300/8.4=392.857cm3

, r = 2 mm = 0.2cm

πr2h=392.857

3.14x0.2^2 xh=392.857

h = 392.857 / 3,14 x 0.2 x 0.2

= 3128cm (length of copper wire)