7. A pizza is an exal it is classified as such? 8. Classify the following mixtures in their proper column. -batchoy -smoke -iron -alcohol -spaghetti -halo-halo -zonrox - Wine -books -clothes in the library inside the cabinet Homogeneous Heterogeneous

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.