A2.50 cm cube of copper metal has a mass of 140.125g. what is the density of copper

We know that density = mass / volume

Volume of a cube = a^3

Where a= length of a side

Given :

edge length of cube =  2.50 cm

so volume of cube of copper = 2.50 X 2.50 X 2.50 = 15.625 cm^3

mass of copper = 140.125 g

So density = Mass / Volume = 140.125 / 15.625 = 8.968 g / cm^3

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.