Describes a laboratory experiment for freeze-drying fruits and vegetables which aims to expose college students to the principles of drying and simultaneous heat and mass transfer. The experimental apparatus, procedure of the experiment, and data analysis are also included. (HM)

Use of problem-solving skills in various classroom situations are discussed. Demonstrates that the thinking level of assigned problems, type of examination questions, example-type problems in class, time factor in examinations, grading, help outside of classroom, and behavioral objectives are all areas where problem-solving skills of students can…

The author is a chemical engineer (doing a research in mass transfer operations at a national laboratory) and an adjunct faculty member. The advantages of being such a faculty member are discussed, indicating that this is an effective mechanism for maintaining technical as well as educational skills. (JN)

Presents an undergraduate laboratory experiment in which a solar collector is used to heat water for domestic use. The working fluid is moved by natural convection so no pumps are required. Experimental apparatus is simple in design and operation so that data can be collected quickly and easily. (Author/JN)