11) The laser in a laboratory in the physics department at UNC emits visible light with a frequency (v) of 4.9 x 1014 s-1.
(a) What is the wavelength (m) of this light?
(b) What is the energy of this light?
(C) What color might this wavelength of visible light be?

the dependant variable is spilled water

the independent is the heat

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.