The table shows the percentages of hydrocarbons that are found in a sample of crude oil. Percentage 30 Hydrocarbons paraffins naphthenes aromatics asphaltics 49 15 6.0 Based on the given information, what is the best classification for this sample of crude oil? an element a pure compound a pure substance a mixture

here are some of the ways in which chemical and nuclear reactions differ.

explanation:

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.