Question

33 Find the length of 13.2 kg of copper wire of diameter 4 mm, when 1 cubic cm of copper weighs 8.4 gm.

Answer 1

13.2 kg of copper = vol(?= let x)
when
8.4 gm of copper = vol(1 cm^3)
8.4*10^-3 kg = vol(10^-4 m^3)

mass= volume*density

assuming density constant

x= 13.2*10^-4/8.4*10^-3 m^3

volume of wire is considered as that of a cylinder with r<<l

where l is length of the wire
r is radius of cross sectional area of wire

then

x=2*pi*r*l

hence

l= x/2*r is your answer

Answer 2

Step-by-step explanation:

your answer is hear :—

call we will take out the the diameter of the radius then we will put the formula of volume of cylinder that is by a square with answer will come that 22 y71 75 x sin cube then there is given the weight 1 cm cube weight is equal to 8.4 G then we have to take out the answer in KG then we have to divide the number with thousand at last doing this work our last answer will come 125m