Iof distilled wader
ond equal
a student takes about 4ml of distill
in four best tubes marked p q r & s
then dissolves in each test tube and et
amant or one salt in one test tubes
namely sodium sulphate in pardassium,
sulphate in g, calcium sulphate in ra
magnesium sulphate in s arder that he
adds an equal amount of soap solution in
each dest tube
naman die indipen
to which test tubecs he observes a good
amount of lather foam on shaking each!

the role of the microscope world in creating new materials .

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.